UVLS clears are water-based, architectural-grade clears made for interior and exterior applications. UVLS Clears are made with an acrylic – aliphatic polyurethane resin which is exceptionally durable with excellent adhesion. Clears are durable and do not yellow over time. UVLS stands for Ultra-Violet Light Stabilizer; clears contain UV protection for underlying colors, especially helpful when top-coating candy2o and other dyes & stains. UVLS = Ultra-Violet Light Stabilizer.