Thread: Filler without talc

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Originally Posted by MARTINSR

If you prime and paint the filler there isn't an issue with moisture.

Brian

yes and no the filler can hold moisture and if over welds your better with a ground glass filler has better hold out if any small pin holes mist . some filler can also bleed thru and hot thinner can soak in and move the fillers were ground glass is better over all. moisture with a steel body car is some thing you all way should think of. nice to allways seal up fillers as soon as you can with a steel body

Products like Dura-glass and the fillers mixed with metals like aluminum are great for foundations before you apply regular bondo.
The duraglass is basically waterproof as is the metal fillers, but both should be skim coated with a bondo. They do not sand smooth enough to primer over as they leave many pinholes. That's why they should be skimcoated with a regular bondo.
I get the areas in bare metal ready by applying a coat of epoxy primer. The epoxies will accept any type bodywork over and the primer seals the bare metal against any moisture.