(Automotive Engineering) a coating of a tar or rubber-based material applied to the underside of a motor vehicle to retard corrosion. US name: undercoat
vb
(Automotive Engineering) (tr) to apply a coating of underseal to (a motor vehicle)
A chemical immersion process that easily removes all paint, grease, oil, underseal, adhesives and sound deadening material offers motorsport preparation companies a simpler and safer method for stripping and cleaning bodyshells.
Many people have returned the next day to find their car, garage and workshop in ashes because somewhere inside a wing, say, a spot of underseal was still smouldering away when they left work.
Metal sheet was replaced by newspaper, body filler, and heavy coats of underseal. His craftsmanship in this novel form of laminate was immaculate, though his perfect mock-ups of welding actually took twice as long to execute as the real thing.
underseal - seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion