Interesting info. Might give it a try next time I need to seam seal.

I used that method to make a tarp, probably 15 years ago and it worked rather well. I used Coleman fuel though as I found it mixed with the silicone better than mineral spirits and I also think the odor dissipates faster. I used a synthetic lightweight fabric like used to cover field crops from frost or insects as my tarp material. It's tough and doesn't tear easily, but it is porous, an issue which I needed to fix to use it as a tarp. I mixed the Coleman fuel and silicone in a 5 gallon bucket. At first I tried painting it on, with the fabric hung like a finished tarp, but that was cumbersome, so I took the fabric down and "washed" it in the 5 gallon bucket of mix and then hung it up to dry. This was all done outside away from any buildings due to the flammable aspects. The silicone I used was also the cheaper kind that smells kind of like vinegar as it cures and makes your eyes water, so there is that issue to deal with as well. Coleman fuel and tubes of silicone were a lot cheaper back then, so it was a cheap experiment.

I made a tarp out of water proof fabric but it started leaking everywhere. This is how I fixed it.
I use “kitchen and bath Silicone ultra. White lighting W21101010” available at Menards OR Mainstays brand sold at Walmart.
I used 7 OZ of clear Silicone Kitchen and Bath calk. I mixed it with 28 ounces of camp stove fuel. It will take a lot of mixing to get it mixed up. I used a paint roller and laid the tarp out flat then hung it to dry.
Before sealing it was 25.4 ounces. After sealing 32.2 ounces adding 6.2 ounces.
You can also use low odor mineral spirits but the smell goes away with camp fuel but not with mineral spirits.
I used the leftover to waterproof a pair of leather gloves and a pair of boots.

I hope everything is ok John. It seems you have deleted a bunch of your posts from the forum.

Wish you would leave your posts up for reference.