Originally Posted by
3alarmer
...while I suppose you might be correct, I wonder if you've ever used it for this ? Because it has seemed quite permanent in a number of saddle applications for a number of years, all in use, and all exposed to the sun. It is, as stated, another form of a contact cement, in a spray can, and as such, while it is listed as low strength, in this application it is quite strong enough.
So while I have no doubt that Weldwood and a number of other contact cements will work, I would ask you why you think this one will not ?
I don't want to get into some long exchange here, but if you've used it and it's actually failed in use, it would help me to move on. If not, why state an opinion based on speculation ?
Used both contact cement and 3M77 glue on all sorts of things through the years. Not specifically on saddles, but leather and fabric item like leather motorcycling boots, backpacks, bags, suitcases.....
My experience had been that 3M77 spray is mostly like "Spray Mount" on steroids. Used it for many years at school, then at work, building architectural models and at home for light duty bonding for items that stay inside the house, and yes, I have had the stuff fail its bond when exposed to heat, while contact cement is permanent glue, by definition.
If you look at the bottoms of many, if not most plastic based, padded saddles you will usually see evidence of manufacturers using some type of contact cement, which presents itself as brownish, hardened material at the edge where the saddle cover material meets the saddles, plastic base, especially at the nose and tail areas.....
So, at least these most critical high stress areas, contact cement would be the best to use. As already noted, use the 3M77 only at the top, foam padding/cover interface, but not at the bottom edges at the nose tail and sides, under the saddle.