(2 pack) Flex Seal Aerosol Liquid Rubber Sealant Coating, 14 oz, Black

I bought a can at the HD store and used it on a 4' x 4' shed roof. The trouble was it only covered half of the piece of plywood. So I bought another at Walmart for less money. It covered the entire panel and there was still some left. All I can guess is that the HD can was so old it had lost its aerosol propellant. It's expensive but a lot less than any other casual roof protector. Its working too protecting the bare wood.

Water was leaking out of are trough for are waterfall we had cracks so we purchased this spray. It went on easy and covered very well didn't have to use a lot of it let dry overnight and filled trough with water and it hasn't leaked since will buy again if needed only down fall is the smell