Seal Saver - Rubber Seal Conditioner w/Foaming Action. 3X:Chemistry Seal Saver is a foaming rubber seal conditioner shields and conditions expensive RV slide out seals. Prolongs seal life by providing UV protection and decreasing friction during slide out extension. Leaves a light, water-repellent film compatible with all rubber seals and adjacent surfaces. EXTENDS SEAL LIFE: Keeps seals pliable and helps tearing and sticking. Fortified with lubricating PTFE. PROTECTS & CONDITIONS: Offers UVprotection and fights caused by road film, oxidation and the elements. NON-STAINING: Easy to apply foam is non-staining and safe for adjacent surfaces. Use for window and door seals or gaskets on your RV or automobile. SEALS: Leaves a water-repelling film that resists -causing moisture.