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Sika Sikaflex NP 1 Black 10.1oz Cartridge 805588
Sikaflex NP 1 Black is a one-component polyurethane in a 10.1 oz cartridge. It seals moving joints and can go into immersion service after a 21-day cure at 70 F.
- Black 10.1 oz cartridge for moving joints
- Immersion service after 21 days at 70 F
- Not for glass or plastic glazing panels
$7.93
Availability:
In stock
( 89 Available )
Sikaflex NP 1 Black
Sikaflex NP 1 is a one-component moisture-curing polyurethane joint sealant. This Black 10.1 oz cartridge (part 805588) is for moving joints, window perimeters, and immersed service after a 21-day cure. It holds plus or minus 35% movement and typically bonds without a primer. As an aromatic urethane it may discolor in UV, which is less of a concern on this black cartridge.
Key Features
- One-component moisture-curing polyurethane
- Black 10.1 oz cartridge, part 805588
- Immersion after 21 days at 70 F and 50% RH
- Primer-173 is used on green concrete
- Not used for glazing on glass or plastic panels
- Shore A 25-30 (ASTM C661)
Applications
- Joints immersed in water after a 21-day cure
- Expansion joints in precast and masonry
- Aluminum and wood window frames
- Below-grade joints that stay wet
Technical Specifications
| Property | Value |
|---|---|
| Manufacturer | Sika |
| Product | Sikaflex NP 1 |
| Part no. | 805588 |
| Unit | 10.1 oz cartridge |
| Color | Black |
| Movement | +/- 35% (ASTM C719) |
| Immersion wait | 21 days at 70 F |
| Service temperature | -40 F to 180 F |
| Shore A | 25-30 |
| Shelf life | 15 months (cartridge) |
Product documents: Sikaflex NP 1 Product Data Sheet (PDF)
Frequently Asked Questions
What UV discolor does Sikaflex NP 1 Black show?
It is an aromatic urethane and may discolor over time in UV. Where a true white appearance is critical, HY 100, HY 150, or CR 195 is the color-stable pick. This cartridge is black.
What size is Sikaflex NP 1 Black?
The cartridge is 10.1 oz (300 ml), part 805588.
What immersion wait does Sikaflex NP 1 Black need?
21 days at 70 F and 50% RH before water immersion. Primer-173 or Sikaflex Primer-429 is required for immersion. Not for swimming pools or strong oxidizers, and not where water stays above 120 F.
What primer does Sikaflex NP 1 Black need?
Most construction materials, including concrete and masonry, bond without primer. Green concrete uses Primer-173. Copper, stainless, Kynar, and galvanized typically need primer, and an adhesion test is recommended.
What glazing limit does Sikaflex NP 1 Black have?
Not for glass or plastic glazing panels. It is a joint and acoustical sealant, not a glazing tape.
What Shore hardness does Sikaflex NP 1 Black have?
25-30 at standard conditions, 25 after heat aging, max Shore A 50 (ASTM C661).
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