Liquid Rubber Waterproof Sealant – DIY Leak Repair Coating for Flat, Metal & Low Slope Roofs, Foundations, Gutters & More – Flexible Protective Membrane - Black - 5 Gallon

The best ever roof sealer. Our commercial roof has leaked for 18 years.We tried 1 can and were very impressed with the thickness and adhesion.We have now ordered many cans of this and have 85 % finished patching our roof. Even so, after 3-4" of rain in the last 3 days, we are 100% bone dry with zero leaks.This stuff really works.

Had never used this type of product but have to say it worked wonders!Was used on a metal roof that had been battered by repeated recent storms and was the fastestway I could think of to stop the leaks without replacing the roof on the building.Only had about 36 hours between storms and it stopped all leaks.5 Stars!!

I used this product on some cement blocks. I wanted to prevent some soil from gaining some alkalinity from the cement. Out of the can it looks brown but dries black. I put on three coats and it indeed provided a nice rubbery barrier to water movement. It dries to a smooth pliable texture and feels slick. I also applied it to the inground section of some gardening sticks and this nicely extend the life of the sticks.

Works well

Sealed up my cracks on my flat roof. No leaks sofar

works very wellthe sealant is black

Bought twice, second one arrived with broken lid and leakage inside shipping box. Used on pressure treated fence posts but product doesn’t adhere, tends to peel if you are not real careful how you handle it

Goes on wet and stays wet