I would hazard a guess (and this is just a guess) that higher SG epoxies may be more run-resistant due to their denser nature (which oughta make them thicker [more viscous]). Lower SG epoxies would probably tend to soak into the wood better and wet cloth out faster.

Just my educated guess; Pete Rudie is probably the guy with better answers about this stuff.

Shawn

> during a random search for epoxy suppliers I kept seeing a reference to
> "specific gravity" of many different brands of epoxy. As i
> understand it(I could easliy be wrong) specific gravity is weight compared
> to an equal mass of water, with 1.0 being neutral , higher numbers being
> heavier than water(sinks) and lower numbers being lighter than
> water(floats). During my search i noted a huge difference in ranges of
> specific gravity numbers, .42 to 1.6. My question is how much of an impact
> would this make in the characteristics of a kayak? Or would it really
> matter much? I know that there is much, much more desirable traits to look
> for in epoxy than specific gravity. It was more an observation than
> anything else. Hope someone can answer this one.