Sika Sikaflex NP 1 White 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

$11.57

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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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