I want to put some iron-on nylon patches for abrasion protection on the knees.

The instructions say 300 to 325 F (149 C -163 C) pressing on patch lightly for 18 to 20 seconds.

Would this be problematic for the suit?

What vintage is your suit (is the inside fabric a shiny smooth coating or is the inside white with a fine mesh finish.
If your suit is the Pyro Pro,  you could do a small test on the lower leg gator as its not important to the dryness of the suit.
What type of patch/knee pad material are you using?

It’s new and it has a grey inner lining. Possibly white.

As I mentioned it is a nylon patch. I got it at Mountain Equipment Coop.

http://www.mec.ca/Main/home.jsp?bmForm=mec_quick_search&bmFormID=jeKg4p.&bmUID=jeKg4q0&bmIsForm=true&bmPrevTemplate;=/Main/home.jsp&bmText=quick_search&quick_search=nylon+patch&bmImage=search.x&bmImage=search.y&bmImage=search&search;.x=0&search;.y=0

item # 1199 - 058

Thanks Richard,

Al

your suit is made with the breathable material.
Its really tough to get anything to stick the outer nylon layers. If your patching a hole in the knee,...Id do it on the inside surface.
We have some great dry adhesives patches designed specifically for this if your concerned with the MEC patch kit.
Having said the above,..I interested to know how well the MEC patch works on the woven nylon surface,...may have to pick up patch myself and test.

There is no hole, I am just doing preventative maintenance.

So I guess you are saying the heat shouldn’t be a problem ?

Should be OK,..keep the heat source moving,...perhaps place a piece of parchment paper (as used for baking)  over the patch and suit so your iron has a nice smooth surface to slide on,...this prevents any excess liquified adhesive form being smeared past the edges of the patch.
Let us know how it works out!

Thanks Richard,

I keep you posted!

Cheers
A