Anti Rust CCrum Creek Rust Preventive Undercoating is PERFECT for all undercoating situations! From antique cars, off-road vehicles, trailers, RV's, and much more, our undercoating is the perfect rust and corrosion preventative. Not only does our product protect new metals from rusting but it also STOPS currently rusting metals. Crum Creek Undercoating was developed in conjunction with the US Army Tank and Automotive & Armaments Command in nearby Warren, Michigan. Crum CreekTM Undercoating is intended to protect new and also fielded (currently rusting) vehicles. Our coating was tested and approved by the Army lab at Fort Belvoir, Maryland. Test Result Approval numbers available upon request. Surface Preparation and Application Instructions Wear eye protection and ensure good ventilation Remove loose debris from the surface of the area to be undercoated Some masking may be required Do not apply undercoating to exhaust systems or braking components The undercoating flash point is 104F, and can catch fire, so take care to prevent fire.oating