WOOD RX NATURAL 5-GALLON|Wood RX is a technologically advanced water based finish that effectively penetrates, seals and protects exterior wood surfaces. Its 100% acrylic formulation provides superiority, flexibility and adhesion. It allows wood surfaces to breathe, protects against water and moisture penetration, provides maximum protection against mildew and algae growth and contains powerful UV screeners which filter out the sun’s harmful rays.