As a cationic, substantive biopolymer, Hydamer™ CMFP increases the water resistance of sunscreens. After being rinsed with water, the formulation containing Hydamer™ CMFP shows 74% water resistance, some 17 % higher than the value for the placebo. The high molecular weight Hydamer™ CMFP film protects the skin against moisture loss and improves UV filter adhesion. The filter is more difficult to rinse off, so sweat and water have no effect. This level of performance makes
Hydamer™ CMFP especially suited to water-proof concepts.