CAV-PRIME TPO Primer is Versico’s TPO Primer packaged in a pressurized cylinder for spray application. Versico’s TPO Primer is a high-solids content, clear (translucent color), polymer-based splice primer used to prepare TPO membrane for improved adhesion to pressure-sensitive (PS) TPO accessories. CAV-PRIME primers are applied using a self-contained spray system coupled with a spray gun with extension wand and applicator attachment kit. CAV-PRIME spray guns, hoses, and applicator attachment kits are each sold separately