Hurricane CAT 4's advanced technology makes it the new industry standard of 2-part urethane sealers and provides premium surface protection. Its Armor Bond joint stabilization hardens joint sand to prevent sand washout. It provides deep color enhancement with gloss finish using T3 True Tone Technology. It has an added antifungal that protects the sealer film from mold, moss and algae. Hurricane CAT 4 is a concentrated water based film forming sealer that comes as a kit and requires mixing and dilution before use. Recommended for professional use only.