Fix that seam or channel with POR-15® patch. For years our customers have asked us for a thicker version of our world famous POR-15® rust preventive coating, to use for filling seams or holes. Here it is POR-15® patch is quite literally POR-15® rust preventive coating in a tube and it dries as hard as a rock, remains flexible and once dry is totally impervious to fuels and solvents. This rust hole filler is so tough it may actually add strength to weakened metal and it won't absorb moisture and swell like conventional body fillers. Try it yourself - this sandable seam sealer is incredible. Patches holes or cracks in steel, wood and some plastics.
POR 15® Patch Filler and Seam Sealer, 4 oz Net Content, Black or White, 96 hr Curing Time, Applicable Materials: Concrete, Expansion Joints, Plastic, Seams, Steel and Wood