Eco Advance Wood Siloxane Waterproofer - 5 Gallon Ready to use commercial grade formula can be applied using a standard Ideal for use on wood decking, wood fences, plywood, wood shingles, wood siding and much more Protects against water damage, oil, stains, mold, mildew, de-icing salts, and pool/spa chemicals Water-based, non-toxic, non-flammable formula does not harm landscape plantings Vapor permeable (breathable) water proofer can be used on new wood