LORD Fusor T21 Slow Composite Repair Epoxy Adhesive, 210 mL

LORD Fusor T21 is a slow-setting epoxy for composite panel repair and assembly. Its 45-minute working window allows time to position larger body panels and fairings before the adhesive sets.

Benefits

• 45 minute work time for large composite assemblies
• Heat cure option: clamp in 20 minutes, sand and paint in 60 minutes at 180°F (82°C)

Features

• Bonds fiberglass, SMC, carbon fiber, FRP, RTM, Metton and GTX, plus primed metals
• Gray paste

Technical Specifications

• Chemistry: 2-part epoxy
• Color: Gray paste
• Work time: 45 minutes at 70°F (21°C)
• Clamp time: 4 hours at 70°F (21°C), or 20 minutes at 180°F (82°C)
• Sand time: 60 minutes at 180°F (82°C)
• Paint time: 60 minutes at 180°F (82°C)
• Cure time: 60 minutes at 180°F (82°C)
• Lap shear (ASTM D1002, typical): greater than 1600 psi (11.0 MPa) to greater than 2500 psi (17.2 MPa) depending on substrate

Directions for Use

1. Tape off exposed fibers and clean with Fusor 703 adhesion prep/cleaner.
2. For through-cracks or punctures, build a backing patch from Fusor 702 fiberglass cloth and Fusor 100EZ, or a matching SMC piece. Sand the back of the part with 80-grit.
3. Dish out and taper the front of the repair so there are no square edges.
4. Level the plungers, attach the mixing tip and dispense one mixer length to confirm an even mix.
5. Build the patch in layers of 702 cloth and adhesive, pressing in with a Fusor 704 roller. Heat set 15 to 20 minutes at 180°F (82°C).
6. Rough sand, optionally finish with Fusor 114LG, then heat cure the repair 1 hour at 180°F (82°C). Cool before final sanding, priming and painting.

Parker recommends the Fusor 423 mixing tip with a Fusor 502 manual or 504 pneumatic applicator.

Storage and Shelf Life

24 months from date of manufacture when stored at 75°F (24°C) in the original, unopened container.

Safety and Use Limits

For industrial and commercial use by trained personnel only. Not for adhesive-only bonding of structural components unless the vehicle manufacturer specifically recommends it. Read the current Safety Data Sheet and product label before use.

Popular uses

• Repair and bonding of composite body panels
• Assembly bonding of fairings, spoilers, roofs, wind deflectors and fender liners
• Repair of cracks, punctures and tears in composite parts

Choose your shelf life

• Fresh Batch: Standard stock within its labeled shelf life. This does not specify a manufacture date or guarantee a full original shelf-life period.
• Short Shelf Life (1-3 Mths Left): Discounted stock with approximately 1–3 months remaining before the labeled expiration date.
• Recently Expired: Discounted stock past its labeled expiration date. Manufacturer performance and approvals are not assured for expired material.

Short-life and expired stock are available only when inventory is shown. Confirm batch suitability and follow OEM shelf-life requirements before repair use. Published technical values describe material used within manufacturer conditions.

Available size

• 210 mL (7.1 oz) cartridge, Parker part number 3029750

For detailed product selection and repair timing, see the Parker Fusor product guide.