A-300 Base TPO is an acrylic based elastomeric coating. It exhibits exceptional exterior durability and UV stability, superior flexibility in low temperature environments. The A-300 Base TPO is formulated from 100% acrylic polymers and supplied only in a light blue color. This allows the applicator to visually differentiate between the base and top coated areas. This is a water-based material and must be kept from freezing. A-300 Base TPO must be top coated with A-300 Finish.