This is a US3601-4 BCC Adhesion Primer. Sticks to smooth or textured TPO plastic, ideal for refinishing of new, unprinted OEM replacement bumpers from Toyota, Nissan, Kia, Subaru etc. Sticks to TPO plastic without sanding or scuffing. Compatible with most urethane & polyester-based clear topcoat systems. Bumper & cladding adhesion primer does not have to be scuffed of sanded prior to topcoating & it may be topcoated at any time after application.