This does what it says. It enables you to get into hard to reach cavities in car a body. It is good for sills and door bottoms and the inside of wheel arches. It goes on in in a liquid state, but dries to leave a wax film to repel moisture and combat rust. I used it on a chassis member over the rear axle, where the exhaust tends to accelerate corrosion. A plate with a small hole in was welded over the affected area, and then the product sprayed in. A rubber bung was fitted in the plate hole, and underseal sprayed over the top. I am also using it in sills and door bottoms.. Goes a long way per can.
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