ULTRA PRIME FREE™ is a Zero V.O.C., clear transparent, acrylic ELASTOMERIC, waterproofing adhesive, bonding primer sealer. A waterborne, latex based, high resin content formula that contains no fillers or pigments. It is designed to remedy and prepare chalking and/or poorly conditioned surfaces for a finish coat. ULTRA PRIME FREE™ revitalizes and strengthens the surface to which it is applied, preventing cracking, efflorescence, spalling and segregation. ULTRA PRIME FREE™ will bond, seal and waterproof most any exterior surface.