Shop truck bed liner underliners from trusted brands. MTX Performance carries anti-rust and moisture-barrier underliner mats for use beneath drop-in truck bed liners across Canada.
CA $198.00
6 items in stock
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A truck bed liner underliner is a mat installed between a drop-in plastic bed liner and the truck bed floor. Its primary purpose is to prevent the moisture and debris that accumulates under a drop-in liner from accelerating rust on the truck bed surface. Drop-in plastic liners can trap water and road salt against the painted bed floor, which is one of the leading causes of truck bed corrosion on vehicles used year-round in Canada. An underliner acts as a moisture barrier and ventilation layer that reduces this risk significantly.