I don't know about chemical compounds and such but it says clearly on the can "For PVC and Hypalon" ... which to me explained why the surface prep was a bit more than I had expected (had to abraid it to give it a surface to bond to). Unlike the product sold by allinflatables.com... which is significantly more expensive $250 for a 9 - 14 ft pontoon kit... which I may try next....
although at this point I'm thinking of just junking the inflatable and going back to a hard dinghy... I paid 750 for the dink... 6 months later am I really going to put $250 (assuming that works) + the $60 for the west marine product that didn't work, so $310 total, into repairing it?? pretty rediculous... particularly, to my mind, since it's a west marine boat and was a west marine inflatable boat repair product... I usually swear by a hard dinghy anyways, but I couldn't get mine on deck without marking it up, and as I only paid $50 for it, I made the mistake of taking it in tow on a passage "outside" around Cape Hatteras and lost her to a breaking following sea that swamped her and snapped the painter (lesson learned).
“The world turns aside to let any man pass who knows where he is going.” (Epictetus 55 - 135 AD)
"To see new things, and live day to day, is better than wine or poppy, and fitter for a man." (Theseus)