Description
Sikasil®-N Plus US is a one-component neutral cure silicone assembly sealant designed for general-purpose sealing, glazing, and joint applications. This moisture-curing, non-sag RTV silicone provides flexible, durable performance with strong adhesion to a wide range of substrates, making it suitable for construction, industrial, and transportation sealing tasks.
Key Features
- One-component neutral cure silicone sealant
- Designed for sealing, glazing, and assembly applications
- Excellent flexibility for dynamic joint movement
- Bonds to many substrates without priming
- Non-sag formulation for vertical and overhead joints
- Fungicide additive for mildew resistance
- Suitable for interior and exterior applications
- Long service life with durable elastomeric performance
Technical Specifications
| Specification | Value |
|---|---|
| Chemical Base | 1-component silicone |
| Cure Mechanism | Moisture-curing |
| Cure Type | Oxime (neutral cure) |
| Density (uncured) | 8.4 – 11.6 lb/gal |
| VOC | 36 – 37 g/L |
| Skin Time | 15 – 20 minutes |
| Tack Free Time | 30 minutes |
| Shore A Hardness | 15 – 30 |
| Tensile Strength | 190 – 300 psi |
| Elongation at Break | 430% |
| Movement Capability | ±25% |
| Application Temperature | -35 to 140 °F (-32 to 40 °C) |
| Service Temperature | -80 to 350 °F (-62 to 176 °C) |
| Shelf Life | 12 months |
Compatible Substrates and Materials
- Glass
- Aluminum
- Tile
- Fiberglass
- Plastic
- Ceramic
- Masonry
- Concrete
- Brick
- Wood
Application Guidance
Surfaces must be clean, dry, frost-free, and free from oils, grease, or contaminants before application. For non-porous substrates, solvent cleaning may be required, while porous substrates should be mechanically cleaned. Apply using manual or pneumatic dispensing equipment and tool immediately after application, completing tooling before skin formation. Adhesion testing is recommended, and primers may be required for certain substrates.
Typical Use Cases
- Window and door fabrication and glazing
- Perimeter sealing of windows, doors, and skylights
- Expansion and control joints
- HVAC and appliance assembly
- Kitchen, bath, and sanitary sealing applications
- Marine cabin sealing
- Truck, trailer, and RV sealing
Target Industries and Buyers
- Construction and glazing contractors
- Window and door manufacturers
- HVAC and appliance manufacturers
- Transportation and RV manufacturers
- Marine equipment and cabin builders
- General contractors and MRO teams
Performance Advantages
Within the neutral cure silicone sealant category, Sikasil®-N Plus US offers flexibility for dynamic joints combined with broad substrate adhesion and long-term durability. Its neutral cure chemistry supports use on a wider range of materials compared to acetoxy silicones, making it suitable for mixed-material assemblies and sensitive substrates.
Common Questions
Q: What type of sealant is Sikasil®-N Plus US?
A: It is a one-component neutral cure silicone sealant.
Q: Is it suitable for glazing applications?
A: Yes, it is commonly used for glazing, back bedding, and perimeter sealing.
Q: Does it require a primer?
A: It bonds to many substrates without priming, but some substrates may require primer after testing.
Q: Can it be used outdoors?
A: Yes, it offers excellent weathering resistance for exterior use.
Q: Can it be painted?
A: No, it cannot be overpainted.
Q: What is the movement capability?
A: It is designed to accommodate joint movement of ±25%.
Q: What is the typical working time?
A: The skin time is approximately 15–20 minutes, with tack-free time around 30 minutes.
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