Frequently asked questions

Forj is a true composite material: an ultra-high-strength thermoplastic fiber held in place by a low-temperature thermoplastic polymer matrix. Because the fiber and matrix are fully bonded, you get the strength of the fiber and the low-temperature formability of the plastic.

Forj is 100% plastic, and a single ribbon holds over 1,000 lbs. Heated with warm water or hot air, it can be molded into almost any shape and holds that shape once cooled. It’s strong like steel, flexible like rope and adaptable like putty. See the comparison.

Replace a broken chain link or rivet, make a harness, tow gear, or mold custom grips and handles. Forj’s strength, flexibility and low-temperature formability suit many uses, including some we haven’t thought of yet. See real fixes.

Forj is rated at a 1,000 lb breaking strength for a 22 mm width. The ribbon is 1 in (25 mm) wide, so a single strand is a bit stronger than its rating. Layer two strands for roughly double the strength. For working loads, stay under 25% of breaking strength (250 lbs), or 10% (100 lbs) where there’s a risk to life, property or the environment.

Forj currently comes in white only. It’s paintable, so you can color your finished repair.

Not yet. Forj comes as a 1-inch ribbon, but it can be woven or layered into larger panels, so the shapes are limitless. For large orders in a specific size, shape or color, contact us.

Almost any heat source that reaches 140°F (60°C): hot water, a hair dryer, an oven or a heat gun. Keep it under 190°F (88°C) and avoid open flame.

Yes. To adjust, add to or repurpose it, reheat it, reshape it and let it cool. Forj can be reformed several times.

Very well. The bond between layers actually gets stronger as the temperature drops.

There’s no need to sew Forj to itself, because heat creates the strongest bond. If it’s part of something that needs sewing, a needle passes through it without trouble.

Forj softens and becomes moldable near 140°F, so keep finished repairs away from sustained heat at or above that temperature.

It can if it’s exposed to an open flame for too long, so avoid open flame. Also, never heat Forj above 190°F (88°C): the fibers that give it strength will be permanently damaged, and it can cause severe burns.

No. Forj is made with 100-year fiber and resin. Stored in its original tin, it will last 100+ years.

Exposed to UV light, Forj’s UHMWPE (ultra-high-molecular-weight polyethylene) breaks down into micro-particles over roughly 10 to 20 years. Out of sunlight, it takes longer. We hope Forj’s biggest environmental benefit is fixing things so they stay out of landfills.

Orders placed before 9:45am ET on a weekday print that day and ship the next business day. Orders placed after 9:45am print the next business day. Weekend orders ship on Tuesday. Full shipping and returns policy.

Shipping is free anywhere in the U.S. Online checkout ships to U.S. addresses only. For international orders, email info@forj.com for a quote.

Large orders may ship in several boxes. Each box gets its own tracking number, and tracking any one of them shows the others in the shipment.