Superdeck, Gallon, Composite Clear Deck Sealer, 100% Acrylic Professional Grade Sealer Specially Formulated For Composite Decking Using The Most Advanced Non-Yellowing UV & Water Resistant Polymer Technology, Designed To Keep Stains, Grease & Dirt From Attaching To The Composite Decking Surface So They Can Be Easily Cleaned Away, Contains A Highly Effective Multi-Functional Biocide Protecting Surface From Unsightly Mildew & Algae Growth, Composite Deck Sealer Is Ideal For Use Around Barbeque Areas Offering A Stain Resistant Barrier Allowing Spills To Be Cleaned Up Before Staining The Surface, Use On Deck Boards, Steps, Fences & Railing, Suitable For All Types Of Composite Decking Lumber.