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Sika Sikaflex NP 1 White ProPak 20oz Sausage
Sikaflex NP1 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.
- Weather resistant for long-lasting weather tight seals
- Joint movement capability ±35% provides excellent flexibility
- Compatible with non-rigid coatings and can be painted
$10.75
Availability:
Out of stock
Orders over $300 Ship Free!
SKU
20685
Sika Sikaflex NP 1 – White 20oz Sausage
Sikaflex NP 1 is a one-component, gun-grade polyurethane sealant designed for high-performance sealing in a wide range of construction applications. This moisture-curing, elastomeric sealant requires no mixing, offers excellent adhesion to most common substrates without primer, and remains permanently flexible with ±35% movement capability. Sikaflex NP 1 is easy to gun and tool, cures to a durable rubber seal, and can be used both above and below grade—including in wet areas. Available in ProPak sausages to reduce waste on the jobsite.
Key Features:
- One-component polyurethane—no mixing required
- ±35% movement capability ensures lasting flexibility
- Excellent adhesion to concrete, masonry, wood, metal, and stone
- No primer required for most substrates
- Compatible with paint and non-rigid coatings
- Use in wet or immersed conditions when properly primed
- Sound-dampening properties for acoustical sealing
- Wide service temperature range: -40°F to 180°F
Applications:
- Vertical and horizontal joints
- Expansion joints in walls and facades
- Storefronts, precast units, aluminum frames
- Parapets, fascia, vinyl siding, and roofing
- Sound-rated assemblies and partition perimeters
- Green concrete up to 72 hours old (with primer)
Technical Specifications:
| Property | Value |
|---|---|
| Shore A Hardness | 25–30 |
| Elongation at Break | 800% |
| Movement Capability | ±35% |
| Tear Strength | 50 pli |
| Sound Insulation | 44 dB (ASTM E90) |
| Service Temperature | -40°F to 180°F |
| VOC Compliance | Meets all 50 states |
| Packaging | 20 oz sausage (ProPak) |
| Color | White |
Frequently Asked Questions:
Can Sikaflex NP 1 be used underwater or in wet areas?
Yes, Sikaflex NP 1 is suitable for immersed conditions when used with Sikaflex Primer-173.
Is a primer required?
For most surfaces, no primer is needed. However, use Sikaflex Primer-173 when bonding to green concrete or for submerged applications.
Can I paint over Sikaflex NP 1?
Yes, it is compatible with many non-rigid coatings. Test coating compatibility before application.
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