Top 10 Polyurethane Sealants
for April 2023

Polyurethane sealants are a type of adhesive that bonds materials together, such as wood, concrete, glass, tile, and metals. These sealants are flexible, waterproof, and resistant to extreme temperatures, making them ideal for a variety of projects.

In the MOOZ Reviews Lab, we've tested dozens of polyurethane sealants over the years for performance, including adhesion, flexibility, and resistance to extreme temperatures. Our consumer testers evaluate sealants for ease of use, including application, cleanup, and drying time. We also evaluate sealants for durability, including resistance to cracking, peeling, and chipping.

Our top pick for the best polyurethane sealant is Flex Seal, which is a flexible, multi-purpose sealant that can be used for a variety of projects, including sealing cracks and joints, waterproofing, and bonding wood.

1

9.7

SCORE

BASF Masterseal NP-1 Masterseal Stone NP-1 Polyurethane Sealant Cartridge, 12

by BASF

What We like

Joint movement capability 35% provides excellent flexibility for keeping moving joints weathertight

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Product Features

• Weather resistant for long-lasting weather tight seals
• Joint movement capability 35% provides excellent flexibility for keeping moving joints weathertight
• No primer required for most construction materials lowering installation costs
• One-component formula requires no mixing, helping to reduce labor costs

2

9.5

SCORE

BASF Sealant NP1 White Polyurethane 10.1 Oz

by Dow Corning

What We like

Easy to gun and tool, speeding up application and making neater joints

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Product Features

• No primer required for most construction materials lowering installation costs
• Joint movement capability 35% provides excellent flexibility for keeping moving joints weathertight
• Weather resistant for long-lasting weather tight seals
• One-component formula requires no mixing, helping to reduce labor costs

3

9.5

SCORE

MasterSeal NP1 MasterSeal NP-1 Polyurethane Caulking Sealant 10.1 oz. Tube

by PRIMESOURCE BUILDING PRODUCTS INC

What We like

Easy to gun and tool, speeding up application and making neater joints

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Product Features

• Weather resistant for long-lasting weather tight seals
• Joint movement capability 35% provides excellent flexibility for keeping moving joints weathertight
• One-component formula requires no mixing, helping to reduce labor costs
• No primer required for most construction materials lowering installation costs

4

9

SCORE

L R Liquid Rubber Smooth Deck Polyurethane and Dock Coating

by Liquid Rubber USA

What We like

INNOVATIVE PROTECTIVE DECK COATINGS - Liquid Rubber Polyurethane Deck Coating is a high-performance polyurethane coating with a hard, durable & waterproof surface with excellent UV stability

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Product Features

• APPLICATION - Avoid hot, intense direct sunlight during application. Apply above 10 degrees Celsius (50 degrees Fahrenheit). Do not apply later in the day if dew is forecast
• COVERAGE - Should be applied at a coverage of 100 square feet/gallon per coat. Min 2 - 3 heavy coats. For waterproofing areas we recommend 3-4 coats
• EASY TO APPLY - Apply using a conventional brush, roller, or single component sprayer; no mixing required
• POLYURETHANE COATING FOR - Deck & dock protection, on concrete or wood walkways, non-corroded metal structures, pool decks, indoor/outdoor floors, fences, baseboards, plywood surfaces, and more

5

8.9

SCORE

BASF NP-1 Aluminum Polyurethane Gray Sealant

by BASF

What We like

Easy to gun and tool, speeding up application and making neater joints

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Product Features

• Joint movement capability 35% provides excellent flexibility for keeping moving joints weathertight
• Compatible with non-rigid coatings and can be painted
• One-component formula requires no mixing, helping to reduce labor costs
• Superior holding power for long-lasting roof tile installation

6

8.6

SCORE

Dap 18816 12 Pack 10.1 Premium oz. Polyurethane Construction Adhesive Sealant

by Dap Incorporated

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7

8.6

SCORE

Red Devil 97112 Blacktop Roof and Polyurethane Sealant

by Red Devil

What We like

Solvent Clean Up

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Product Features

• Permanently Flexible
• Excellent Adhesion
• Weatherproof
• Paintable

8

8.6

SCORE

MasterSeal NP-1 Polyurethane Sealant 10.1 Caulking oz tube

by MasterSeal

What We like

Item Dimensions: 2.0"L x 2.0"W x 12.25"H

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Product Features

• Country of Origin: United States
• Item Weight: 1.0 lb
• Brand name: MasterSeal

9

8.5

SCORE

Loctite PL S40 White Window

by PL

What We like

Item Package Weight:0.386 Kilograms

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Product Features

• Country Of Origin: United States
• Item Package Dimension:4.572 Centimeters L X 6.35 Centimeters W X 27.178 Centimeters H
• Product Type:Adhesives And Sealants

10

7.9

SCORE

KBRS Accessory Pack KBRS Waterproofing Pack #1 Installation Shower Kit Includes: Liquid Waterproofing Membrane

by KBRS, Inc.

What We like

Liquid Membrane 1 Gallon Covers 50 Square Feet

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Product Features

• (Qty-1) 2-Pack ShowerSeal Polyurethane Sealant
• (Qty-1) 6" X 75' Roll of ShowerSeal Gauging Fabric
• (Qty-1) Gallon ShowerSeal Waterproofing Membrane
• Shower Waterproofing Kit