3M Professional Grade Rubberized Undercoating produces a textured finish which resists chipping, abrasion, exterior rusting and weathering. This coating provides one-coat build-up with no dripping, running or sagging. The undercoating is excellent for automotive undercarriages and for other uses including protection for wheel wells, fenders, quarter panels and more.3M Professional Grade Rubberized Undercoating produces a textured finish which resists chipping, abrasion, exterior rusting and weathering. This coating provides one-coat build-up with no dripping, running or sagging. The undercoating is excellent for automotive undercarriages and for other uses including protection for wheel wells, fenders, quarter panels and more.