GeoTac is a waterproofing membrane that prevents water penetration through pavement and the subsequent damage that it causes. Peel-and-stick application Easy to install with standard equipment PavePrep is a stress relief interlayer that retards reflective cracking in asphalt overlays. Thermal stresses that result from temperature changes as well as water penetration can cause cracks to propagate through the new pavement. PavePrep disperses these stresses through its very dense, but flexible mastic and high-strength geotextile, as well as prevents water penetration. PavePrep is ideal for overlaying concrete joints. Reduces reflection cracking and provides stress relief Available standard for use with a tack coat, or peel-and-stick.