In reply to dunbarbiker:
> I am needing to a similar sort of thing to a kayak cag, how would you apply the hot iron and not damage the material?
Assuming the cag is PVC or neoprene (they're not generally made from breathable materials), then you're probably better off using an adhesive; PVC and neoprene both bond pretty well with suitable adhesives.
BTW, the iron isn't 'hot'; it's usually about 1.5 dots (on a 3 dots = cotton dry iron). You can also protect the fabric from direct contact with the iron by using brown paper or parchment paper.