The Dicor Roof-Gard protects all RV roofing and helps prevent oxidation, drying and cracking. The Roof-Gard is mild and non-abrasive and reduces fading with UV sunscreen. It will leave a finish on your roof that will repel dust and water. The Dicor Roof-Gard will keep roof surfaces cleaner long with no residue or oily build-up. It is free of silicone oils, waxes, glycerin or petroleum distillates and will not harm rubber roofing.