Ask Andy®

Yes, Bio-Shield has been used commercially and safely for over 40 years on just about every external building surface, including roofs, skylights, solar panels, walls, painted surfaces, concrete paths and drives, decks, asphalt, and tennis courts.

It contains no bleach (chlorine), salts, phosphates, is non-acidic and fully bio-degradable once diluted and applied to the surface.

Follow the simple safety instructions on the bottle for use around pets and plants