Fillers

Anti-Sag - Cabosil
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Cabosil is light weight, low density fumed silica powder additive
Chopped Strand 1/4"
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Chopped Strand is actual strands of fiberglass chopped into 1/4" lengths.
Econo Fill - Talc
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Talc is a magnesium hydroxide powder and is the most economical filler.
Mini Fibers
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Mini Fibres creates an excellent medium sanding, non-slumping compound
Interfibe
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Interfiber is a treated cellulose fiber and is the replacement filler for asbestos
Pro-Fil - Glass Bubbles
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Glass bubbles are a hollow silicone dioxide powder filler and extender.
Milled Fibers
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Milled Fibers are made up of finely ground fiberglass fibers.
Non-Slip Additive
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Non Slip Additive is a medium grade crushed walnut shells added as a filler.
UV Absorber
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Ultra Violet Absorber is made up of a finely ground mica powder
Wood Flour
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Wood Flour is a fine sawdust that has been filtered so that there are no lumps.

Anti-Sag - Cabosil