Many tramp materials do NOT like heat welding. A lot of materials will become brittle and fail, if you try to weld them. If the factory did not heat weld your tramp, do not try it yourself. Even if the factory welded your tramp, be careful. They may have used an ultrasonic weld only material.

There are commercial patches available. The best I have seen is called "MIL STD self vulcanizing fabric reinforced patch" It was made by Zodiac. It is basically a thin layer of Goop on sailcloth in a sealed foil bag.

You can make it yourself by coating a 3-4 in wide strip of tramp material coated with GOOP or 3M 52000. Use just enough adhesive to fill the patch and the tramp material. Clamp the patch in place with waxpaper covered wood blocks. Leave it alone until it dries.