Advanced Polymer, Inc. has introduced API-278 stain blocking polish. API-278 is a water-based hybrid resin system that provides deep penetrating, high gloss, stain resistant finish for new densified concrete surfaces, according to the company. API-278 forms a non-sacrificial surface that can be buffed/burnished to a high gloss. It can be used as the primary coating or can serve as a protective layer under traditional concrete polish systems. Surfaces coated with API-278 exhibit long lasting resistance to wear, moisture and staining.