Lowe’s is discounting its Project Source polyethylene tarps across four sizes today only, with the 16-ft. x 20-ft. version down to $19.98 from $66.98. All of them are made from the same 5-mil waterproof material and qualify for an extra 30% off when three or more of the same size are purchased. Sizes run from a 12-ft x 16-ft tarp up to a 30-ft x 50-ft tarp for larger coverage needs. Shipping is free. Shop Now at Lowe’s