Rust Check Coat & Protect is a thick gel sprayed across the complete underside of your vehicle. It is not a sealant, and that difference matters.
It creeps into seams. Welded seams and folded panel edges are where rust starts, because that is where road salt and water sit and never dry out. The gel penetrates into those gaps and displaces the moisture already trapped there.
Sealants do the opposite. A hard sealant coats the surface and bridges over a seam rather than getting inside it. When it eventually cracks, water gets underneath and stays there, and you cannot see it happening.
It does not need clean bare metal. Rust Check adheres to used vehicles as well as new ones. It will not reverse corrosion that has already started, but it will slow it down considerably.
No drip. Coat & Protect stays where we put it. You will not find it on your driveway.