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Save 10% on all New Products this month- Code July-24
Save 10% on all New Products this month- Code July-24

Watertight Sealant

Original price $15.98 - Original price $15.98
Original price
$15.98 - $15.98
Current price $15.98

Achieve Weathertight Seals with MasterSeal NP 1 Elastomeric Sealant

Discover MasterSeal NP 1, the premium one-component, elastomeric polyurethane sealant that offers superior performance and versatility for interior and exterior applications, without the need for mixing or priming on most surfaces.


  • One-Component Formula: Requires no mixing, reducing labor costs
  • ±35% Joint Movement Capability: Provides excellent flexibility for weathertight seals
  • Easy to Gun and Tool: Speeds up application and creates neater joints
  • Primer-Free for Most Materials: Lowers installation costs
  • Weather Resistant: Delivers long-lasting, weathertight seals
  • Compatible with Non-Rigid Coatings: Can be painted for a seamless finish
  • Superior Holding Power: Ideal for long-lasting roof tile installation
  • Wide Temperature Application Range: Suitable for all climates
  • UL Listed: Passes 4-hour, 4-inch, fire and hose stream test with Ultra Block or mineral wool
  • Water Immersion Suitable: Documented performance in wet areas
More Details

MasterSeal NP 1 is a high-performance, elastomeric polyurethane sealant that offers unmatched versatility and durability for interior and exterior applications. This one-component, gun-grade sealant requires no mixing, making it easy to use and helping to reduce labor costs. With a joint movement capability of ±35%, MasterSeal NP 1 provides excellent flexibility, ensuring weathertight seals in even the most demanding conditions.
Suitable for use above and below grade, as well as in water immersion applications, MasterSeal NP 1 is the ideal choice for a wide range of projects, including expansion joints, panel walls, precast units, aluminum and wood window frames, roofing, fascia, parapets, vinyl siding, and storefront assemblies. The sealant's easy-to-gun and tool formula speeds up application and creates neater joints, while its primer-free application on most construction materials helps to lower installation costs. MasterSeal NP 1 is weather-resistant, compatible with non-rigid coatings, and offers superior holding power for long-lasting roof tile installation. Available in 12 standard colors and suitable for a wide temperature application range, this UL-listed sealant meets VOC requirements in all 50 states and is backed by documented performance in wet areas.

What's Included
Prop 65

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