Ames Research Laboratories BMX5RG Blue MAX Waterproof Liquid Rubber with Interior and Sub-Exterior Concrete Sealer, 5 Gallon (Pack of 1), 640 Fluid Ounce

This stuff is amazing. Completely stopped the leaks.

You are not going to believe how I used this product. I build a whole water tank just with the product. No mortar used. Nice and thick but no pasty. Application easy I used ketchup bottles to spread. I used 2 of them on a cabin roof and painted over for water proofing. If you are DIY. You need this. This is my 8 bucket order.

This is the best waterproofing , i only will use this from now on, sometimes takes two coats, wut well worth the cost

We used this to cover the floor deck to our house prior to having it protected by walls and a roof. It protected the tongue and groove plywood from water, and water did not seep into the tongue and groove ceiling for the basement below. We used 3 coats and tarped it, sweeping rainwater off the tarp and occasionally removing the tarps so everything could breathe and dry out. We have used it on our barn decking during construction as well (see photo). No smell or harsh chemicals!

Love the product this is my third 5 gallon purchase. It does not help your package and product when the deliverer drops the box from his shoulder directly to the ground, while i was approaching the gate. This Side up means up not end up sideways after dropping the box from that high up.