Interlux Interdeck Polyurethane Non-Skid Deck Coating is an excellent, easy to apply slip resistant polyurethane finish for decks. Interdeck contains a fine aggregate and will apply easily on all substrates. Interdeck provides a low sheen finish that helps protect against dazzle from sunlight reflected off decks. A tough polyurethane resin protects decks against everyday wear and tear. Interdeck is suitable for all substrates.