C2 Guard for WoodC2 Guard for Wood is a non toxic waterproofer and sealant designed for use on bare wood. Instead of sitting on top of wood like a typical stain, C2 Guard penetrates deep into the surface, forming a flexible polymer that becomes part of the cellular structure. For up to 10 years, this enhanced cellular structure resists water penetration. This means no cracking, splitting, warping, corrosion or mold mildew. C2 Guard can go on clear or can be tinted to