Rubber

2-Roll 1/4" Thick Rubber Sheet (4"×10'): Solid rubber strips — for gaskets/DIY, supports/leveling; abrasion/flooring material. $Building Supply

80x40x1/8” Solid Rubber Sheet Heavy Duty Silicone Rubber Roll Sheeting High Temperature Heat Protection Large Waterproof Styrene Butadiene Mat Black$$Building Supply