@Hayden I have coated a synthetic canvas pack with the silicone brew and it was very very successful - better than new because the rain just beads off, so pack does not get wet.
I have a canvas camper cover that fits over a tube frame for the back of a ute. I plan to coat it and I am sure the result will be great. I tried boiled linseed on a canvas thermal Army surplus coat to water proof it as a feeding out jacket. The jacket turned out very hardwearing but went yellowish and unsightly over time and hard and crinkly with the polymerized linseed. This doesnt happen to silicone
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