The guide includes nearly 500 glass fiber reinforcement products and solutions for making composite parts. They are in various shapes from bobbins to mats or fabrics and can be used through all existing composite fabrication processes.

OCV™ Technical Fabricsscroll to top

OCV™ Technical Fabrics provides high-value-added solutions for demanding commercial and industrial applications. In its 10 factories, located in eight countries, OCV™ Technical Fabrics manufactures a comprehensive glass, carbon and hybrid product range including:

  • A variety of 3D fabric reinforcements for closed-mold processes
  • Multiaxial, woven and unidirectional carbon and aramid fibers with a dedicated aerospace-approved manufacturing facility
  • Multiaxials, knits and combinations made with two or more layers of unidirectional fibers stitched together with a light polyester thread; also available are multiaxials that are powder-bonded instead of stitched
  • Specialty mats made with chopped glass fibers with either a universal silane sizing or special sizings for thermoplastic or phenolic resins
  • Unidirectionals and combinations of stitched, woven and hot-melt reinforcements in full width or tape form
  • Woven roving (WR) fabrics and combinations made with glass and/ or other fibers, based on direct, assembled or texturized roving
  • A complex of WR and chopped strand mat (CSM) either powderbonded or mechanically stitched with a fine polyester or glass yarn without chemical binder
OCV™ Technical Fabrics is also developing advanced solutions to help its customers transform markets with new applications. A prime example is Ultrablade™ fabric developed to enable customers to produce longer and lighter wind blades. The Technical Fabrics business is also working on solutions for the in-situ relining of pressurized pipe and fabrics for thermoplastic composites. Cured-in-place pipe (CIPP) relining uses winding and folding technology with oriented-chop fabrics and woven roving mat fabrics. The business also has a fabrics excellence center at its facility in Zele, Belgium. The 5,500-square-meter (about 60,000 square feet) facility has both pilot- and full-scale state-of-the-art production equipment for developing, testing and evaluating new fabric technologies before production and use in customer processes.

OCV™ Non-Woven Technologiesscroll to top

Owens Corning is the leading global producer of glass-based specialty non-wovens. The products are made from randomly dispersed glass fibers, wet or dry laid and bonded into a thin sheet.

Veils and specialty non-wovens are used in multiple applications in several industries:

  • Surfacing veils for glass-reinforced polymer (GRP) laminates including pipe and chemical storage tanks
  • Surfacing veils for flat GRP panels
  • Surfacing veils for gypsum sheathing and wallboard
  • Core materials for flat panels

Nearly all of the non-woven products manufactured by Owens Corning are unique for each customer and application. Its business model is grounded in servicing individual customer needs. The marketfocused organization works closely with a diverse set of marketleading global customers to identify and design new solutions.

OCV™ Reinforcementsscroll to top

OCVTM Reinforcements is dedicated to creating customer value by delivering world-class solutions, expertise and support. The business offers the widest range of glass fiber reinforcement products in the world.
Our industry-leading portfolio includes reinforcements focused on specific markets and applications to expand the use of composite materials. Markets and solutions include:

  • Transforming translucent panels with OC HiLightTM roving
  • Transforming advanced closed-mold processes with Uniconform®
  • Transforming automotive mufflers with Silentex® noise control solutions including new pre-form technology
  • Transforming planes, pressure tanks and military vehicles with new high-performance reinforcements
  • Transforming roads, runways and parking lots with TruPave® engineered paving mat that helps prevent cracking
  • Transforming applications for corrosive environments with Advantex® E-CR glass fiber reinforcements
  • Transforming reinforced concrete with Cem-FIL® alkali-resistant glass fibers
  • Transforming reinforced thermoplastics with Twintex® co-mingled glass and thermoplastic reinforcements

All of these specialty products are:

  • Engineered for high quality and premium performance
  • Tailored to help you grow your business and develop new applications
  • Designed to compete against steel, aluminum and other traditional materials
These products and others are commercially available and can help you expand the use of composites for years to come.

Advantex® E-CR Glassscroll to top

Advantex® glass fiber reinforcements from Owens Corning are both an E-glass and a true E-CR glass according to ASTM D 578, ISO 2078, and DIN1259-1. The product provides improved corrosion resistance compared to standard E-glass.

When it was introduced in 1997, boron-free Advantex® glass was expected to provide superior corrosion resistance in acidic environments. That benefit was confirmed with field use data, and field experience also found that the product performs well in any aqueous environment, including water and alkaline solutions.

Compared to standard E-glass, Advantex® glass also decreases emissions and reduces the environmental impact of manufacturing fiberglass.

A recent study by Owens Corning also shows how Advantex® glass fiber outperforms standard E-glass reinforcements in stressed composite laminates in a corrosive environment. Previous testing examined the impact of corrosive chemicals on bare glass. The new study checked laminates under load in a corrosive environment to more closely simulate conditions an application may encounter in the field.

The study combined corrosion and stress testing and examined the laminates using SEM (Scanning Electron Microscopy) and EDX (Energy Dispersive X-ray) spectroscopy. Advantex® glass fiber laminates demonstrated superior corrosion resistance compared to E-glass in laminates exposed to a solution of 10 percent sulfuric acid. The study also confirmed previous findings on the leaching mechanism of E-glass in acidic environments.

The outcome provides a compelling reason for using Advantex® glass fiber reinforcements throughout a composite structure. While some designs require E-CR glass in a corrosion barrier and allow standard E-glass in the rest of the laminate, these results argue for reducing the risk of laminate failure by using E-CR glass throughout the structure.

Advantex® glass fibers provide a competitive advantage for our customers by helping them create high-value applications for the benefit of their customers and the end-users.

For additional information, visit

High-Performance Reinforcementsscroll to top

The OCV™ High-Performance Reinforcements product platform features ShieldStrand®, XStrand®, FliteStrand® and WindStrand® high-strength reinforcement products targeted at ballistics, industrial, aerospace and wind energy markets.

Building on its heritage of leadership and innovation in glass fiber reinforcement and composite technology, Owens Corning developed a new generation of reinforcement technology that redefines the availability and value of high-performance glass fiber materials.

Owens Corning high-performance reinforcements offer these benefits:

  • Strength - Up to 50 percent higher strength with S-glass versus conventional E-glass
  • Modulus (stiffness) - Up to 20 percent higher modulus with S-glass versus conventional E-glass fibers
  • Fatigue - End-use parts have higher fatigue properties, a key requirement for high-performance composite applications
  • Impact Resistance - Up to 80 percent better impact resistance than conventional E-glass fibers
  • Aging and Corrosion Resistance - Better aging and corrosion resistance than E-CR and conventional E-glass fibers
  • Temperature Resistance - Better resistance at elevated temperatures than conventional E-glass fibers

Proprietary technology provides the nucleus for the growing array of products with special properties. In 2006, Owens Corning introduced large-scale production to high-strength glass fiber, an achievement previously thought to be technically unfeasible.

Capacity for the new direct-melt process is about 50 times the size of paramelters typically used to produce high-strength glass. This scale production process was developed to make high-performance reinforcements widely available and achieve a level of value that enhances their competitiveness.

Wider availability provides greater choice and security of supply, encouraging the use of high-performance glass fiber reinforcements by designers and manufacturers.

Silentex® Engineered Noise Control Solutionsscroll to top

Owens Corning Silentex® engineered products are the preferred solutions for acoustic and thermal applications in harsh environments.

Silentex® engineered products have been used successfully in the automotive exhaust market for more than 25 years to meet acoustic and thermal requirements. The products are produced with proprietary Advantex® E-CR glass, which provides exceptional thermal and chemical durability.

The Silentex® product line uses specially formulated sizings to enable highspeed processing and ensure maximum texturization can be obtained to achieve acoustic and thermal performance requirements.

  • Equipment that can be used to directly fill silencers (mufflers) of all types
  • Custom-designed bags (polymer or glass) filled with texturized glass fibers for insertion into silencers
  • Low-binder molded inserts (preforms) that provide rapid mistakeproof insertion of texturized glass fibers into silencers
  • Continuous tangle-free strand with customized texturization

Owens Corning Advantex® glass production facilities are in Europe, Asia and the Americas. Operations for bags and preforms are available in each of these regions along with technical support to assist with applications.

The use of Silentex® engineered solutions is not limited to the automotive market. The products can be used wherever extreme acoustic and thermal insulation is required. Current applications include power sport vehicles (motorcycles, snowmobile and ATVs), industrial silencers and other non-automotive applications.

Twintex® Co-Mingled Glass and Thermoplastic Reinforcementsscroll to top

Twintex® reinforcements are ready-to-use thermoplastic and glass combination designed for high mechanical properties, such as excellent stiffness-to-weight ratio and impact properties. The proprietary reinforcement also provides efficient and clean (no VOCs) process conditions, high freedom of design and is recyclable.

Twintex® products are made of co-mingled glass and thermoplastic filaments. Direct, single-end roving is the base material for the whole Twintex® reinforcement product line, and can be provided with a polypropylene matrix (PP) or co-polyester resin (PET).

Consolidation is achieved by heating the roving above melting temperature of the matrix (180°C-230°C/360°F-450°F for PP) and applying a pressure before cooling step under pressure.

The Twintex® PP product range also includes fabrics, plates and long glass fiber concentrated pellets:
Applications made with Twintex® reinforcements include:

  • Bumper beams
  • Kayak seats
  • Truck panel skins
  • Micro-car floors
  • Under engine protection
  • Small boat hulls
  • Front end assemblies
  • Inside door panels
  • Standard profiles and profiles with external coating
  • Pressure vessels

Cem-FIL® Alkali-Resistant Glass Fibersscroll to top

Special alkali-resistant (AR) glass fibers have been developed for use with cement-based products (glass-reinforced concrete [GRC], mortars, composite cement, etc.). The fibers are manufactured with Zirconia content in compliance with ASTM C 1666/0 1666/M-07 and EN 15455. AR glass fibers from Owens Corning are marketed as Cem-FIL® glass fiber.

AR glass fibers have been in use for 40 years in more than 100 countries worldwide to create some of the world's most stunning architecture while offering strong and durable performance in widely varying cement- and mortar-based applications, including new and restored building facades, pre-cast components, utility poles, and residential and industrial flooring. In some flooring applications, AR glass fibers can replace the structural steel grid.

AR glass fibers are unique as a concrete reinforcement. They have the same specific gravity as the stone or gravel mixed in concrete so fiber dispersion is easier to achieve than with other fibers.

AR fiber contributes efficiently to tensile strength before concrete is able to crack, thanks to its high elastic modulus and its affinity for and efficient bonding with concrete. AR glass fiber reinforcements can reduce the weight and thickness of concrete by a factor of 10.

The benefits of Cem-FIL® AR glass fiber include:

  • Excellent compatibility with cement matrix
  • Excellent workability even at high dosage
  • Increases chemical resistance (e.g. deicing products)
  • Extends long-term durability of concrete
  • Does not float or sink in concrete
  • Does not entrap air
  • Fast and uniform dispersion

Cem-FIL® fibers are manufactured under a quality management system approved as meeting the requirements for ISO 9001. Additionally, the performance of Cem-FIL® fibers has been subjectded to independent assessment and approval in Germany (Zulassung N° Z-3.72.1731), and Cem-FIL® fibers meet the safety standards of European Directive 99/45/ EC, 67/548/EEC and their latest amendments.

Glass Fiber Manufacturingscroll to top

The manufacturing process for glass fiber reinforcements begins with raw materials, which are basically minerals. We mix those minerals based on the recipe of the glass formulation.

The three main ingredients used to make glass are silicon dioxide (SiO2), lime (calcium oxide or CaO) and aluminum oxide (Al2O3). Changing the mix of those components and other minerals will result in significantly different glasses. E-glass (with good electrical insulation properties, hence the name) is a commonly used glass on the market.

Advantex® glass, which is recognized as the standard within the OCV™ businesses, has no boron in the batch and as a result has better corrosion resistance and a smaller environmental footprint than standard E-glass. Other glasses (alkali-resistant glass [AR] for cement or high-performance glasses) are also available in the OCV™ product line.

A furnace converts the mineral batch into molten glass and then distributes the glass through a channel into an area called the forehearth where the glass fibers are formed. A typical furnace is about the size of a three-car garage. It runs at a little more than 2,300°F (1250°C) for 24 hours a day and seven days a week.

Once completely molten, the liquid and homogeneous glass composition flows into heated refractory channels to feed the bushings. The bushings are made of a platinum and rhodium alloy that has small holes through which liquid glass flows.

The glass then solidifies into filament shape by rapid cooling. Once solidified, the glass filaments are coated with a sizing made of chemical components which give the glass strands a good process-ability and adhesion with resins.

Several fabrication processes exist to produce different product formats: multi-end roving, chopped strands, veil or continuous filament mat.

Composite Advantagesscroll to top

Composites are combinations of two or more materials (reinforcing elements and resin) that retain their identities while acting in concert. Fiberglass-reinforced polymer (FRP) composites are safe and reliable solutions, able to face tough conditions in various environments and have outperformed traditional materials for many years.

Composites offer these important benefits:

  • Light Weight - Composite parts help save weight compared to steel parts (up to 30 percent lighter) with similar thermomechanical properties.
  • High Strength - Pound for pound, glass fibers are stronger than steel. Composites gain their strength when fibers are set within a resin matrix. Fibers carry the load while the resin spreads the load imposed on the composite.
  • Easy to Shape - Composites can be molded into complex shapes at relatively low cost. This flexibility offers designers extensive latitude in new product design.
  • Integration of Functions - Parts with multiple functions can often be made in a single step with composites.
  • Corrosion Resistance - Composites provide long-term resistance to severe chemical and temperature environments. Composites are the material choice for outdoor exposure, chemical handling and severe environment service.
  • Durability - Composite structures have an exceedingly long life span. Coupled with low maintenance requirements, the longevity of composites is a benefit when used in critical applications. After a half-century of use, many well-designed composite structures have yet to wear out.
  • Cost savings - Thanks to their low weight and high mechanical properties, the use of composites in many applications reduces manufacturing, shipping and maintenance costs compared to traditional materials such as steel.

For more information about the advantages of composites, visit the website of the American Composite Manufacturers Association at

Composites and Sustainabilityscroll to top

Composite materials have many benefits in end-use applications including four that have special significance for the environment.

  • Lightweight parts for automobiles and trucks are contributing to fuel savings while resisting corrosion and lasting longer
  • The use of durable fiberglass-reinforced polymer (FRP) pipe for oil, water and sewage projects takes advantage of the noncorrosive properties of FRP
  • The Silentex® muffler filling system is being adopted by leading car and truck manufacturers to help quiet their vehicles
  • With various technical methods now available, the recycling of glass strand is possible in both thermoplastic and thermoset applications

Owens Corning has worked with its customers to analyze the environmental impact of their products and similar goods made with competitive materials. Composite materials fared well in these studies. The embodied energy and greenhouse gas (GHG) environmental burden for the raw materials mined and used in finished composite parts were consistently lower than their steel or aluminum equivalents. The studies also quantified reduced energy and greenhouse gases during the transportation of finished parts due to their significantly lighter weight.

The company's proprietary Advantex® glass formulation contributes to sustainability by increasing mechanical properties and corrosion resistance - compared to standard E glass - while also decreasing emissions and reducing the environmental impact of manufacturing fiberglass.

Owens Corning glass fiber veils for carpet, ceilings and flooring are the first in the glass non-woven industry to earn two rigorous indoor air quality certifications from the GREENGUARD Environmental Institute. These products - for new interior applications - are now GREENGUARD Indoor Air Quality Certified®, along with being certified for the more stringent GREENGUARD Children & SchoolsSM product emissions standard.

Glass fiber reinforcements for wind turbine blades enable commercial generation electricity from a renewable resource. Owens Corning is the leading provider of materials for wind energy.


Following are definitions of some uncommon terms used in this Guide:

  • Advantex® glass:

    A patented boron-free glass formulation with excellent corrosion resistance in a wide range of environments; it is both an E-CR glass and an E-glass as defined by ASTM D578. Bare glass: Glass fiber from the bushing before binder or sizing is applied.
  • Basis weight:

    Nominal weight of mat for a certain area, ex. 1.5 oz/ft2.
  • Beaming:

    The operation of winding yarns onto a beam, usually in preparation for slashing, weaving or warp knitting. Also called warping.
  • Biaxial material:

    Material having fibers oriented in both the warp (0 degree) and weft (90 degree) direction.
  • Binder:

    The agent applied to glass roving, glass mat or preforms to bind the fibers prior to laminating or molding.
  • Bundle:

    A general term for a collection of essentially parallel filaments or fibers.
  • Bundle TEX:

    A measure of the size of the glass bundles in the mat.
  • Burst strength:

    The ability of a material to resist rupture by pressure.
  • Cem-FIL® reinforcements:

    Alkali-resistant (AR) glass fiber reinforcements for concrete.
  • Chop length:

    The length to which the glass fibers have been cut.
  • Composite:

    A combination of two or more materials (reinforcing elements, filler, and resin). The constituents retain their identities though they act in concert.
  • Count:

    Determined by the number of warp and weft (fill) yarns per cm/ inch of fabrics. Indicates tightness of weave.
  • Creel:

    A device for holding the required number of roving balls or mat plies in the desired position before they are fed into the resin bath.
  • Crimp:

    The amount of extra yarn required to allow for warp and weft (fill) to make a meter (yard) of fabric. Often expressed as a percent.
  • Cure:

    To irreversibly change the properties of a thermosetting resin by chemical reaction.
  • Dry strength:

    Strength of the mat as received, an indication of it's handling properties prior to addition of resin.
  • E-glass:

    A family of glasses composed primarily of the oxides of calcium, aluminum and silicon that have chemical compositions as listed in ASTM D578-05 for glasses that are used as reinforcements in general applications.
  • Fabric, non-woven:

    A textile structure produced by bonding or interlocking fibers by mechanical, chemical or solvent means.
  • Fabric, woven:

    Material constructed of interlaced yarns, fibers or filaments.
  • Fiber:

    A general term used to refer to filamentary materials; it is the general term for a filament of finite length.
  • Filament:

    The smallest unit of fibrous material. Yarn that consists of one strand is called monofilament. Most textile filament yarns are multifilament, meaning there are many continuous filaments or strands.
  • Fill:

    See Weft.
  • Finish:

    In composite applications, a finish or sizing promotes adhesion between fiber glass and a matrix resin or coating. Sizing compounds are applied to yarn to bind the fiber together and stiffen the yarn to provide abrasion resistance.
  • FliteStrand® reinforcements:

    High-performance reinforcements for aerospace applications.
  • Knitted fabrics:

    Produced by interlooping strands of yarn, roving, etc.
  • Laminate:

    Material composed of successive layers of resin and reinforcement bonded together.
  • Loss on ignition (LOI):

    Weight loss, usually expressed as percent of total, after burning off an organic sizing from glass fibers, or an organic resin from a glass fiber laminate.
  • Mat:

    A fibrous material for reinforced plastic consisting of randomly oriented chopped filaments, or swirled continuous filaments, loosely held together with a binder; available in various widths, weight, and lengths.
  • Modulus:

    The measurement of stiffness in a material, equaling the ratio of applied load (stress) to the resultant deformation of the material. A high modulus indicates a stiff material.
  • Ply:

    The number of single yarns twisted together to form a plied yarn, or the number of plied yarns twisted together to form a cord.
  • Polyester resin:

    The term generally used for unsaturated polyesters, formed by the reaction of dibasic organic acids and polyhydric alcohol.
  • Polymer:

    An organic compound, natural or synthetic, whose structure can be represented by a repeated small unit, such as polyethylene, rubber, polyester and cellulose.
  • Prepreg:

    Abbreviation for pre-impregnated reinforcement fibers. Prepreg is any reinforcing material loaded with B-stage resin, catalyst and pigment ready for placement in the mold.
  • Appearance of fiber pattern on part surface.
  • Profile:

    A shape, referring to the cross-section of the part to be pultruded.
  • Pultrusion:

    A continuous process for manufacturing composites with a constant cross-sectional shape. The process consists of pulling a fiber reinforcing material through a resin impregnation bath and through a shaping die, where the resin is heated and cured.
  • Reinforced plastics:

    Plastic parts consisting of resins to which reinforcing fibers, mats, fabrics, etc., have been added before the forming operation.
  • Reinforcements:

    Material used in plastic processes to give physical and mechanical properties that plastic alone cannot provide. Typically fiberglass, graphite, aramids and others in roving, mat and/or fabric form.
  • Resin:

    A solid or pseudo-solid organic material that exhibits a tendency to flow under stress. Most resins are polymers. In reinforced plastics, the material used to bind together the reinforcement material.
  • Roving:

    A number of strands, tows or ends collected into a parallel bundle with little or no twist of reinforcing fibers.
  • Roving yield:

    A unit of measure of the linear density of a fiberglass roving in yards/lb., the lower the number the larger the size of the roving bundle.
  • S-glass:

    A magnesia-alumina-silicate glass, especially designed to provide very high tensile strength glass filaments.
  • Scrim:

    A lightweight, open-weave, coarse fabric.
  • Selvage or selvedge:

    The narrow edge of a woven fabric that runs parallel to the warp. It is woven more tightly to prevent the fabric from unraveling.
  • ShieldStrand® reinforcements:

    High-performance reinforcements for armor and ballistic protection applications.
  • Silentex® system:

    A durable noise control system for automotive and industrial mufflers and silencers.
  • Sizing:

    Any treatment consisting of starch, gelatin, oil, wax or other suitable ingredient that is applied to yarn or fibers at the time of formation to protect the surface and aid the process of handling and fabrication. The treatment contains ingredients that provide surface lubricity and binding action, but no coupling agent.
  • Surfacing mat:

    A very thin ply, usually 7-20 mils thick, of non-woven glass or synthetic fiber used primarily to produce a smooth, cosmetic surface on a reinforced-plastic laminate.
  • Tear strength:

    The resistance of the mat to shearing or tearing.
  • Tensile strength:

    The strength exhibited by a fabric subjected to tension, as distinct from torsion, compression or shear.
  • TEX:

    Weight in grams per kilometer (1,000 meters) of yarn, fiber, filament or strands.
  • Thermoplastic:

    Capable of being repeatedly softened by increase of temperature and hardened by decrease in temperature; applicable to those materials whose change upon heating is substantially physical rather than chemical and that in the softened stage can be shaped by flow into articles by molding or extrusion.
  • Thermoset:

    A plastic that, when cured by application of heat or chemical means, changes into a substantially infusible and insoluble material.
  • Thickness:

    Fabrics range in thickness and are commonly from .025 mm to 1.27 mm (.001" to .050").
  • Twintex® reinforcement:

    A co-mingled glass and thermoplastic fiber reinforcement for lightweight, high stiffness, abrasion- and impactresistant laminates.
  • Veil:

    A non-woven glass fiber material used to enhance surface finish, weather-ability, appearance and smoothness to the touch (see surfacing mat).
  • Warp:

    The set of yarns that runs lengthwise and parallel to the selvage, and is interwoven with the fill. The sheet of yarns wound together on a beam for the purpose of weaving or warm knitting.
  • Warping:

    The operation of winding yarns onto a beam, usually in preparation for slashing, weaving or warp knitting. Also called beaming.
  • Weave:

    The system or pattern of intersecting warp and filling yarns. The three most common are plain, twill and satin.
  • Weft (fill):

    The transverse threads or fibers in a woven fabric; those fibers running perpendicular to the warp. Each crosswise length is called a pick. In the weaving process, the filling yarn is carried by the shuttle, rapier or some other type of yarn carrier. Weft is also called the fill or filling yarn.
  • Weight ratio:

    The ratio of warp to fill.
  • Wet strength:

    The apparent strength of mat after addition of resin, an indication of mat performance during impregnation and molding.
  • WindStrand® reinforcements:

    High-performance reinforcements for wind blade applications.
  • Woven fabric:

    Manufactured on a loom, a fabric consists of a warp and a weft (fill). Together, the warp and weft determine the type of weave.
  • XStrand® reinforcements:

    High-performance reinforcements for commercial and industrial applications.
  • Yarn size:

    Weight, thickness and coverage of the fabric, thus determining performance characteristics.
  • Yield:

    The maximum allowable stress in a material, less than the maximum attainable stress, at which an increase in strain occurs without an increase in stress. Only materials that exhibit this unique phenomenon of yielding have a yield point. Fiberglassreinforced thermoset plastics generally do not exhibit a yield point. Also a term to describe weight per unit length in yards/lbs., for example a 113 yield product weighs 113 yards/lb.

For more information, download the Composite Solutions Reinforcement Guide scroll to top

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