Sika Sikaflex NP 1 Redwood Tan 10oz Cartridge

Sikaflex NP 1 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

$6.26

Availability: Out of stock

SKU

20670

Sika Sikaflex NP 1 – High-Performance Polyurethane Sealant

Sika Sikaflex NP 1 is a one-component, high-performance, non-priming, elastomeric polyurethane sealant designed for both interior and exterior applications. This gun-grade sealant requires no mixing and offers excellent adhesion to a wide range of construction materials, including concrete, masonry, aluminum, and wood. With ±35% joint movement capability, it provides a flexible, long-lasting seal in high-movement and weather-exposed joints. It is ideal for sealing expansion joints, panel walls, roofing applications, and window perimeters. Sikaflex NP 1 is also an effective acoustical sealant, reducing sound transmission in partition systems.

Key Features:

One-component, gun-grade polyurethane sealant
±35% movement capability for dynamic joint applications
Excellent adhesion to concrete, masonry, and wood
Weather and UV resistant for long-term performance
Can be applied in a wide range of temperatures
Meets VOC requirements in all 50 states
Can be painted and is compatible with non-rigid coatings
Can adhere to green concrete up to 72 hours after pour
Effective acoustical sealant for high STC partition systems

Technical Specifications:

Property	Value
Shore A Hardness	25-30 (ASTM C661)
Elongation at Break	800% (ASTM D412)
Tear Strength	50 pli (ASTM D1004)
Movement Capability	±35% (ASTM C719)
Service Temperature	-40°F to 180°F (-40°C to 82°C)
Tack-Free Time	Passes ASTM C679
Weathering Resistance	Passes ASTM C793
VOC Content	Compliant in all 50 states

Frequently Asked Questions:

What are the primary applications for Sikaflex NP 1?
Sikaflex NP 1 is ideal for expansion joints, panel walls, roofing, precast concrete, aluminum window frames, and other general construction applications requiring a flexible and durable seal.

Does Sikaflex NP 1 require a primer?
In most cases, no primer is required for common construction substrates. However, for applications involving immersion in water or green concrete, priming with Sikaflex Primer-173 is recommended.

Can Sikaflex NP 1 be painted?
Yes, it is compatible with non-rigid coatings and can be painted after full cure.

How long does Sikaflex NP 1 take to cure?
It cures at a rate of approximately 1/8" per day depending on temperature and humidity conditions.

For the latest technical specifications and application guidelines, visit Sika USA.

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