Pumice as filler

[imported_Dutch]

I see it listed in fiberflass coatings incs. web stie- ive never used it. what is it used for and how is it different than other fillers?

[Levi]

Is this the same pumice used to sharpen knives etc.? As in pumice stone.....seems it would be a strong additive to epoxy for sure.

[Tristan]

I've used it as An additive to paint to make a non-skid surface on the floors of a couple of my boats. Of course non-skid surfaces tend to collect dirt, so it's a mixed blessing, better than falling on your ass I guess. I guess it can be used to thicken resin as well. Tolman ("A skiff for all seasons") comments on various fillers which he adds to Epoxy (but he doesn't use pumice). In making fillers I have tried talc (baby pumice pieces), fine sawdust, microbaloons, and cabosil, but prefer cabosil alone, though it's very light fluffy stuff and takes a while to mix into the resin. I also use cabosil only to make glue. I'd like to hear more comment on filler and glue makers. Lowell P Thomas

[kc8pql]

You can fill resin with most anything. I worked on an R & D project for Owens Corning Fiberglass that used fly ash from the smoke stack scrubbers in one of their glass furnaces. They were also using powered limestone.

[Mike Keers]

The FCI printed catalog says "Better non-skid than sand". They sell three grades, Fine, Medium and Coarse.

[JimConlin]

I never tested the hypothesis, but i have always used the synthetic nonskid grit 'cuz i thought it'd be easier to sand off later.