Kosmic Polyurethane Klear. Gallon. UC-35 is a 3.5 VOC, National Rule and SCAQMD Rule 1151 compliant version of UC-1. It may be used to topcoat any urethane or polyurethane enamels, and any SHIMRINŽ Base Coat color. UC35 gives a high-gloss, has excellent weathering and UV resistance. UC35 dries fast and hard, and can be colored sanded and buffed the next day.