Masterseal Masterseal Np1 Elastomeric Polyurethane Sealant, White, 10.1 Oz.

MasterSeal NP1 is a one-component, gun-grade elastomeric polyurethane sealant designed for high-performance bonding on construction and masonry projects. This non-priming sealant requires no mixing, making it ideal for contractors and DIYers who need reliable, fast application without complicated prep work. It typically bonds to concrete, masonry, and many other materials without primer, saving time and reducing installation costs.

Whether sealing joints in concrete foundations, masonry walls, or exterior trim, MasterSeal NP1 delivers excellent flexibility and adhesion. Its weather and water resistance provides reliable sealing in outdoor conditions. The sealant skins overnight and fully cures within a week, allowing faster project completion on time-sensitive repairs and installations.

Features and Benefits

• No-Primer Formula: Typically bonds directly to most construction materials without primer, eliminating prep steps and reducing material costs.
• One-Component, No Mixing: Ready-to-use gun-grade formula reduces labor time and minimizes application errors.
• Fast Curing: Skins overnight and fully cures in about a week, speeding up project timelines.
• Excellent Flexibility and Adhesion: Maintains a tight, flexible seal that resists cracking and joint separation.
• Weather and Water Resistant: Designed to withstand moisture and outdoor conditions for durable sealing performance.
• Wide Temperature Application Range: Suitable for all climates and varying environmental conditions.
• Easy Application: Smooth, gun-grade consistency tools cleanly for professional-looking joints.

Specifications

• Brand: MasterSeal
• Model: NP1WHT12
• Color: White
• Size: 10.1 oz. tube
• Type: One-component elastomeric polyurethane sealant
• Primer Required: Typically no
• Cure Time: Skins overnight; full cure in approximately one week