Dicor Roof-Gard Rubber Roof Protectant further enhances EPDM rubber roofing UV ray resistance and helps prevent fading, oxidation, drying and cracking. Its mild and non-abrasive formula keeps surfaces cleaner longer with no residue or oily build-up. Dicor Roof-Gard contains no silicone, waxes, glycerine or petroleum distillates and will not harm rubber roofing.