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Materials for Tie Down Straps

When it comes to tie down webbing, three materials are most commonly used: polyester, polypropylene, and nylon. The three types have key differences because of varying webbed materials. When comparing the differences, it is best to look at fiber stretch, water resistance, UV protection, abrasion resistance, safety, and of course break strength.

Tie downs can become loose because webbing can stretch under a load. Polypropylene, which is a form of plastic, can stretch up to 50% while holding a load.  Nylon usually stretches 20-30% under a 2,500 Lbs load. Polyester tie down webbing is best for heavy loads because it only extends 5 to 15%.

Nylon and polypropylene have weak UV protection when compared to polyester. If the webbing is frequently used outdoors, polyester may be your best choice.

Break strength is defined as the maximum stress or load that can be applied to materials before breaks or failures occur. Polypropylene has the weakest strength at around 700 pounds, whereas polyester is the strongest (10,000 pounds).

Do not forget that abrasion resistance is essential for securing loads. Minor webbing damage can reduce strong holds on objects. Polyester webbing is the best at withstanding abrasion when compared to nylon and polypropylene.

Water resistance affects the durability and strength of tie down webbing. Polyester and polypropylene repel water and resist the growth of mildew. Nylon webbing is weaker when it is wet, which means it will stretch. Polyester webbing can be solid even when wet.

We carry tie down webbing, elastic cords, and military belts and buckles in all three materials. Call us today for more information.