Your cart is empty.
Your cart is empty.MasterSeal NP 1 is a one-component, high-performance, non-priming, gun-grade, elastomeric polyurethane sealant. It requires no mixing and typically requires no priming to bond to many materials, including concrete and masonry.
GONZALEZJLS
Reviewed in the United States on January 23, 2025
Excellent product and quality.
Capital One Visa
Reviewed in the United States on July 18, 2024
does not drip when applied on vertical surface.
Will
Reviewed in the United States on February 25, 2024
My spa waterfall stone was coming apart. Water was lifting the top cap, used this and no more problem (for now). Urethane works great with water. Let it dry for 2-3 days for a great seal.
Patricia R.
Reviewed in the United States on November 16, 2024
Good concrete crack sealer. Stays flexible
froggy frogger
Reviewed in the United States on November 16, 2024
Product worked really well on my stone installation
Roberto Rosenfeld
Reviewed in the United States on August 4, 2023
I have used this twice.First, I installed a modern awning above an exterior door and to prevent water coming through the small gap between the awning and the wall it was attached to, I used this sealant. It worked great! It completely stopped rain from running down the door.So I tried it again. This time to fill the gaps between a flat linear shower drain and the tiles surrounding it. Again, it sealed the area completely and water from the shower now flows down the drain with no issues . Before, some water was going into the crevices left by the tile installer.Problem is, as other reviewers stated, the material is thick and requires some prep work in order to achieve a clean outcome. Yes, have lots of paper tissue or rugs available. You will be cleaning your hands/fingers all the time. Yes, have blades from a utility knife available to clean any excess. Don't forget to use painter's tape to protect the areas you don't want to have this sticky material on. And, specially, work slowly. Be patient. The thick material is not entirely a bad thing. It will allow you to shape things as you need/want. I required a 45 degree angle for the water to flow from the shower flow into the flat linear shower drain and the thickness made it easier. If you are a detailed-oriented person, you are going to like this product.
Wanda Lyons
Reviewed in the United States on August 30, 2023
I had a water stain on a closet ceiling and feared it was from a leak in the shingled part of my roof. The roofing company I called sent an inspector who examined the area and felt it was a deteriorated seal around a bathroom vent pipe. He recommended this product to seal around the pipe and we were able to do the work ourselves. The seal has worked well.
RUreading?
Reviewed in the United States on January 16, 2023
Bought this 10 oz POLY SEALANT in the color: STONE. The grout around my electric fireplace crumbled and this color matched the stone surround to fill in the gaps. Was rather thick and hard to clean up using soap and water so I Used a rubbing alcohol based product to cleanup more easily. Time will tell if it is durable enough to do the job. 4 stars because of difficulty to clean up and packaging hard to read.
Recommended Products
