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Enduro Water-Based Sanding Sealer is a clear undercoat with strong adhesion properties that forms an easily sandable foundation for your project. The high solids content builds a fast film. Use under any of General Finishes retail or professional topcoats except Enduro VAR. Dries tack-free in 20 minutes in ideal conditions. The Sanding Sealer provides initial sealing for all GF water based topcoats and can be used over raw wood or a stained surface.