Quote:
Originally Posted by fg1
I've never fully trusted product data sheets nor listened to salesmen so my own testing has always been the norm. Occasionally someone will ask why we use 3M Glass Bubbles below the waterline. Never had an issue in 30 years but just to be sure we started a test. One test article was WEST epoxy thickened with cab-o-sil only, the other was WEST with glass bubbles only. The two were submerged for 2 years and weighed every month. After 2 years of submersion the glass bubble sample had not changed at all. The cab-o-sil sample gained 1 gram (its total weight was 52 grams)
I think the lesson learned here is whatever you use below the waterline, USE EPOXY!
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As a boatyard glass guy, this is hilarious.
