About RainCoat® Tinted Water Repellent (Water Base) Use to protect new or weathered wood from premature graying, mildew growth and water damage, including splitting and warping caused by moisture absorption. Imparts a sheer, wood colored, matte finish in natural wood tones. Contains UV-blocking pigment to stop premature wood graying. Long-term water repellency exceeds Federal specifications. Protects against cracking, splitting, warping. Mildew-resistant coating film keeps surface free of mildew stain.