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Sika Sikaflex NP 1 Limestone 20oz Sausage
Sikaflex NP 1 is a one-component, high-performance, elastomeric polyurethane sealant. Requires no mixing and typically requires no priming to bond to many materials, including concrete and masonry.
- Weather resistant
- Excellent flexibility
- Can be painted
$12.13
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Sika Sikaflex NP 1 Limestone 20oz Sausage
Sika Sikaflex NP 1 Limestone is a one-component, gun-grade polyurethane sealant designed for durable joint sealing in commercial and residential construction. This high-performance elastomeric sealant requires no mixing and typically no priming for many common substrates, helping simplify installation while delivering long-lasting weather resistance. It is suitable for interior and exterior applications, above and below grade, and even water immersion when properly primed.
Key Features
- One-component polyurethane sealant with no mixing required.
- Gun-grade formula for easy application and tooling.
- Joint movement capability of ±35% for flexible, weathertight seals.
- Typically requires no primer on many common construction materials.
- Compatible with non-rigid coatings and can be painted.
- Weather resistant for long-lasting interior and exterior performance.
- Can be used as an acoustic sealant to help support high STC values.
- Available in 20 oz ProPaks to help reduce jobsite waste.
Applications
- Expansion joints.
- Panel walls and precast units.
- Aluminum and wood window frames.
- Roofing, fascia, and parapets.
- Storefront assemblies.
- Vinyl siding joints.
- Interior and exterior sealing above and below grade.
- Water immersion applications when used with required primer.
Technical Specifications
| Property | Value |
|---|---|
| Product Type | One-component, gun-grade elastomeric polyurethane sealant |
| Packaging | 20 oz ProPak sausage, 20 per carton |
| Color | Limestone |
| Shelf Life | 1 year when properly stored |
| Shore A Hardness | 25 to 30 |
| Elongation at Break | 800% |
| Movement Capability | ±35% |
| Adhesion in Peel | 30 pli |
| Tear Strength | 50 pli |
| Shrinkage | None |
| Sound Insulation | 44 dB |
| Service Temperature | -40°F to 180°F |
| Sag | No sag |
| Standards | ASTM C920 Type S Grade NS Class 35; Federal TT-S-00230C Type II Class A; Corps of Engineers CRD-C-541 Type II Class A; CAN/CGSB-19.13-M87; ISO 11600-F-25LM |
FAQs
What is Sika Sikaflex NP 1 used for?
It is used for sealing expansion joints, panel walls, precast units, window frames, parapets, storefront assemblies, and other construction joints in interior and exterior applications.
Can Sikaflex NP 1 be used below grade or in wet areas?
Yes. It is suitable for above and below grade use and for water immersion applications when the required primer is used.
Does Sikaflex NP 1 require mixing?
No. It is a one-component sealant that requires no mixing before application.
Can this sealant be painted?
Yes. Sikaflex NP 1 is compatible with non-rigid coatings and can be painted.
Does Sikaflex NP 1 need a primer?
It is considered a non-priming sealant for many substrates, but special conditions may require primer. Primer is required for immersion applications and green concrete applications.
What joint movement can Sikaflex NP 1 handle?
It has a movement capability of ±35%, helping it maintain a durable seal in moving joints.
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