Sika Sikaflex NP 1 Polyurethane Sealant, White – 10.1 oz Cartridge

Sika Sikaflex NP 1 Polyurethane Sealant, White – 10.1 oz Cartridge

Regular price $7.00

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Sikaflex NP 1 Polyurethane Sealant, White 10.1 oz

Sikaflex NP 1 is a one-component, gun-grade polyurethane sealant that bonds without priming to many materials, including concrete and masonry. It cures to a tough, elastomeric seal and also serves as an acoustical sealant to help reduce sound transmission in partition systems.


Key Features:

  • One-Component Convenience: No mixing required; typically bonds without primer to common building materials
  • Durable Elastomeric Seal: Cures to a tough, flexible rubber for long-lasting joint performance
  • Acoustical Performance: Helps reduce sound transmission by sealing gaps around cut-outs and perimeters
  • Versatile Applications: Suitable for concrete, masonry, and general waterproofing tasks
  • White 10.1 oz Cartridge: Standard gun-grade format for easy application on site

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Color White
Cartridge Size 10.1 oz
Type One-component, gun-grade elastomeric polyurethane sealant
Priming Typically no priming required on many substrates
Applications Concrete, masonry; acoustical sealing of partitions, perimeters, and cut-outs
Cure Cures to a tough rubber elastomer
Standards/Approvals ASTM C920 Type S, Grade NS, Class 35, Use NT, M, A, T, O and I; Federal Spec TT-S-00230C Type II Class A; Corps of Engineers CRD-C-541 Type II Class A; CAN/CGSB-19.13-M87 MCG-2-25-A-N No. 81026; CFI accepted; UL Classified; ISO 11600-F-25LM; STC (Sound Transmission class); UL Registered
Style/Category Waterproofing
Manufacturer Number 805583
Product Number SIKSFN1WH1210

Frequently Asked Questions (FAQ):

Q: Can I apply Sikaflex NP 1 without a primer?
A: In most cases, yes—NP 1 typically requires no priming to bond to many substrates like concrete and masonry.


Q: Is it suitable for acoustical sealing?
A: Yes. It can be used as an acoustical sealant to help support high STC values by sealing gaps and perimeters.


Q: How is it applied?
A: It’s a gun-grade sealant supplied in a 10.1 oz cartridge for use with a standard caulk gun.


Q: What color is this cartridge?
A: White.


Q: What standards does it meet?
A: It complies with ASTM C920 (Type S, Grade NS, Class 35, Use NT, M, A, T, O and I) and other listed standards.


Quiet Strength in a Clean, Seamless Line

This sealant draws the eye to what matters—crisp edges and intentional lines—while quietly silencing the space. The white, gun-grade polyurethane forms a supple, architectural joint that looks tailored and remains resilient. Use it to frame door casings and partition perimeters for a hushed, gallery-like finish. It’s the discreet detail that signals refined, luxurious craftsmanship.


Choose Sikaflex NP 1 to achieve a durable, acoustically smart seal that installs easily and looks impeccably clean.

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Subject to Approval & Availability
All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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