Fortec 5680-BD Kevlar

Fortec 5680-BD Kevlar | Fortec Stabilization

Fortec 5680-BD Kevlar

Kevlar® fiber aramid fiber fabric for crack repair, segmental seam repair, waterproofing and structural reinforcement.

Fortec 5680-BD Kevlar

Product Description

Fortec 5680-BD Kevlar® is an aramid fiber fabric system comprised of highly durable 5,680 denier Kevlar yarns, producing a superior and dense weave. The system is designed for heavy duty crack repair, crack control, and structural strengthening of concrete and masonry structures where durability, impact resistance and protection of water intrusion is needed. The system of Fortec 5680-BD Kevlar textile used with Fortec Lo-Mod 526 Flexible epoxy resin is the best alliance of strength and bonding that seals out moisture, transfers loads and allows temperature and stress related movements to occur without brittleness.

Target Applications

  • Transverse cracks in bridge decks
  • Post-tensioned segmental bridge joints
  • Longitudinal cracks and joints
  • Rigid pavement joint and dowel protection
  • Cast-in-place water storage structures
  • Cyclical loading applications
  • Where crack control with water protection is needed

Repair Applications

  • Collision and impacts
  • Excessive movement
  • Elastomeric joint failures
  • Age
  • Overuse


  • Protection from corrosion
  • Increased strength
  • Water and chloride prevention
  • Ride quality
  • Long term repairs
  • Increased service life

Key Features

  • High bond strength
  • Conforms to irregular surfaces
  • Easy gun-applied epoxy resins
  • Strongest duty Kevlar system available
  • Excellent crack control


  • Custom widths and lengths are available.


Base Material:
5,680 denier Kevlar yarns woven into a dense, bidirectional weave
Product shall be kept from direct sunlight
Shelf Life:
Filament Tensile Strength, ksi (MPa):
522 (3,600)

Filament Tensile Modulus, ksi (MPa):
17,985 (124,000)
Fabric Nominal Width, in (mm):
8 (200)
Fabric Nominal Thickness, in (mm):
0.040 (1.0)
Primary Fiber Direction:
0o and 90o, bidirectional plain weave
Fabric Weight, oz/yd2 (g/m2):
26.6 (900)

Mechanical and Physical Properties

0o / 90oUltimate Tensile Strength1 f*fu ksi (MPa)Modulus of Elasticity1 Ef ksi (GPa)Ultimate Tensile Strength per Unit Width p*fu kips/in (kN/mm)Tensile Elastic Modulus per Unit Width Eftf kips/in (kN/mm)Ultimate Strain at Rupture î*fu in/in (mm/mm)
Average Values100 (0.69)3,450 (23.8)4.0 (0.69)138 (23.8)0.029 (0.029)
Design Values60 (0.41)2,070 (14.3)2.4 (0.41)82.8 (14.3)0.029 (0.029)
1ASTM D3039

How To Use

Preparation. Protect the work area from standing water and inclement weather. Surfaces may be damp. Surfaces must be clean and sound. Spalling or other damaged substrate must be removed to solid material. Laitance must be removed. Grinding, chipping, scarifying, shot blasting, sand blasting, or water jet are all acceptable methods. For concrete and masonry applications, patch all uneven surfaces with Fortec #4550 LPL or #1276 Hi-Modulus Fiber Matrix epoxy resins. Broadcast silica sand on patches to avoid amine blush. Use oil-free compressed air to remove any dust debris immediately prior to application of epoxy resins. Keep Fortec 5680-BD Kevlar from contamination. Store in a clean and dry area away from direct sunlight. Keep in original packaging until installation and protect from physical damage. Remove dust, dirt, and any other foreign materials. Remove water, grease, wax, oil or any other liquids with an appropriate solvent.

Cutting. Fortec 5680-BD Kevlar fabric may be cut to a desired length with sharp scissors or a sharp utility knife. Dull tools tend to fray the ends of the product and should be avoided. Do not cut with circular or reciprocal saws.

Epoxy Resin. Fortec Lo-Mod 526 Flexible epoxy resin is recommended for all applications.

Applications. Horizontal and vertical applications may use either the dry or wet lay-up techniques. The wet lay-up technique using an automated impregnator will provide best results for overhead applications. An automated impregnator will typically provide more uniform application of resin using less resin, and improved results with fewer voids and less waste.

Dry Lay-Up Application. Apply resin to the substrate at a uniform rate of approximately 45 ft2/gal (35 mils). Coverage yield will vary with substrate roughness. Using gloved hands and a plastic laminating roller, press Fortec 5680-BD Kevlar fabric into the resin pressing out any wrinkles and air voids. Allow the resin to squeeze through the grid to assure a proper bond. For a single grid layer, apply a epoxy resin top coat at a rate of approximately 160 ft2/gal (10 mils) while the base resin is still within its working limit (depending on temperature) and smooth for a finished appearance. If more than one layer of Tow Sheet textile is used, apply intermediate epoxy resin layers at a rate of approximately 100 ft2/gal (15 mils). A good measure for dry lay-up applications will use approximately twice the weight of resin to textile. After cure, perform sounding to locate any voids. Inject epoxy resin as needed to fill all voids.

Wet Lay-Up Application. Prior to applying the wetted Fortec 5680-BD Kevlar Fabric, apply Fortec Lo-Mod 526 Flexible epoxy resin at a rate of approximately 160 ft2/gal (6 mils) to a prepared substrate to seal the surface and to provide a tacky surface to apply the textile. Resin will tack at 30 minutes at 70oF. Saturate and infuse the 5680-BD Kevlar Fabric with Fortec Lo-Mod 526 Flexible epoxy resin. For uniform application, the resin infusing process should be completed using an automated impregnator. Apply the saturated 5680-BD Kevlar Fabric textile to the sealed substrate and press out any wrinkles and air voids with a plastic laminating roller. Apply additional saturated 5680-BD Kevlar Fabric textile while the previous layer is still within its resin working limit if multiple layers are desired. Finally, apply a top coat of epoxy resin a rate of approximately 160 ft2/gal (10 mils) and smooth for a finished appearance. After cure, perform sounding to locate any voids. Inject epoxy resin as needed to fill all voids.

Surface Coating. Because Kevlar and all other aramid fibers absorb and are degraded by ultraviolet light, the finished Fortec 5680-BD Kevlar system must be protected from UV light. Fortec 105 Superstick Hi-Build 100% epoxy is an excellent, corrosive resistant coating designed for this application. Apply Fortec 105 Superstick Hi-Build as directed.

Qualifications. Each structural and life safety application requires the design and certification of a licensed, professional engineer.

Cautions. An externally applied Kevlar and epoxy system is a vapor barrier. Consult with a licensed, professional engineer to evaluate results of encapsulating porous substrates. Installation should be performed only by a Fortec trained and approved installer. Caution must be used when handling Fortec 5680-BD Kevlar Fabrics. As with any cutting and adhesive operation, proper eye protection should be used. Always follow OSHA and site safety requirements.

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