Description
Sika® Primer-215 is a solvent-based polyurethane primer formulated to improve adhesion on plastics and wood prior to the application of Sika one-component polyurethane adhesives and sealants. This moisture-reactive primer creates a thin interfacial layer that enhances bonding performance across a range of plastic and timber substrates in industrial and assembly applications.
Key Features
- Solvent-based polyurethane primer for plastics and wood
- Enhances adhesion for Sika 1-component polyurethane systems
- Forms a moisture-reactive bonding layer on treated surfaces
- Colorless to slightly yellow for low visual impact
- Easy application using brush, felt, or foam applicator
- Designed for professional surface preparation processes
Technical Specifications
| Specification | Value |
|---|---|
| Chemical Base | Solvent-based polyurethane solution |
| Color | Colorless, slightly yellow |
| Solid Content | 34% |
| Application Temperature | 5 to 40 °C (41 to 104 °F) |
| Application Method | Brush, felt, or foam applicator |
| Consumption | 50 g/m² |
| Flash-Off Time (≥ 15 °C) | 30 minutes |
| Flash-Off Time (< 15 °C) | 60 minutes |
| Maximum Flash-Off Time | 24 hours |
| Shelf Life | 12 months |
Compatible Substrates and Materials
- GRP (glass fiber reinforced plastic)
- Epoxy resins
- PVC
- ABS
- Timber
- Various plastics (testing recommended)
Application Guidance
Surfaces must be clean, dry, and free from grease, oil, dust, and contaminants prior to application. Additional pre-treatment such as scuffing or cleaning may be required depending on the substrate. Apply a thin, continuous coat using a brush, felt, or foam applicator at recommended temperatures between 15 °C and 25 °C. Allow proper flash-off time before adhesive application, and reseal the container immediately after use to maintain product quality.
Typical Use Cases
- Adhesion promotion on plastic substrates prior to bonding
- Surface preparation for wood bonding applications
- Pre-treatment for polyurethane adhesive systems
- Industrial assembly and fabrication processes
- Marine and composite bonding preparation
Target Industries and Buyers
- Industrial manufacturers
- Marine and composite fabricators
- Transportation and vehicle assembly
- Woodworking and panel assembly
- OEM production teams and professional installers
Performance Advantages
Within the adhesion promoter category, Sika® Primer-215 is formulated specifically for plastics and wood where reliable bonding can require surface conditioning. Its moisture-reactive chemistry improves compatibility between substrates and polyurethane adhesives, helping achieve consistent adhesion performance across a range of materials.
Common Questions
Q: What is Sika® Primer-215 used for?
A: It is used to improve adhesion on plastics and wood before applying Sika polyurethane adhesives and sealants.
Q: What substrates is it suitable for?
A: It is suitable for plastics such as GRP, PVC, ABS, epoxy resins, and timber.
Q: How is it applied?
A: It is applied as a thin coat using a brush, felt, or foam applicator.
Q: Is more than one coat required?
A: No, it is intended for a single, thin application.
Q: What is the required flash-off time?
A: Approximately 30 minutes at temperatures above 15 °C, or 60 minutes below 15 °C.
Q: Can it be used on all plastics?
A: Testing is required because plastic types vary and adhesion must be verified.
Q: Is it an adhesive itself?
A: No, it is a primer used to improve adhesion before applying adhesives.
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