Years ago, I bought a BRX from Speedy. He sent a couple of tubes of something with a note that said "when weight is an issue, try this bedding" (paraphrasing). Well I never opened it and I don't have it any more. So this is why I'm asking if there is a notable difference in bedding epoxy weight. One would assume that for instance, the aluminum Devcon would be lighter than the steel Devocn, per volume. The marine tex doesn't have any metallic filler that I know of.