For any type of dressing to work its magic properly, the rubber must first be ready to accept the product. There are two approaches; cleaning the road grime and dirt off the surface with our Rubber Cleaner or stripping the surface of any and all dressing residue to create a truly clean slate with our Rubber Prep. Rubber Prep offers a much deeper clean, blasting silicones, sealants, waxes, oils, and greases off the surface, which is especially useful when you are changing the type of dressing you're using. Rubber Prep is an easy apply-and-wipe proposition; no scrubbing necessary! It's odorless and features ultra-low VOCs. Applicator sponge included.