4 fl oz (118 ml) Bottle. Return the shine to your chrome exhaust. Formulated to break down rubber marks and road tar, Boot Mark Remover exhaust cleaner is applied directly to the soiled area. Just cover the target area with gel when the exhaust is cool and let it do its thing. Scrub and wipe away the residue, then rinse clean. Ideal for removing boot marks, asphalt resin, baked-on insects, and melted plastic bags. Resealable applicator cap.