Description
Sikaflex®-290 DC PRO is a one-component polyurethane marine sealant specifically formulated for caulking joints in traditional timber decking. This moisture-curing, elastomeric compound provides durable, weather-resistant sealing for exposed marine environments, delivering flexible performance and a sandable finish for professional deck applications.
Key Features
- One-component polyurethane deck caulking compound
- Designed for timber decking joints in marine environments
- Excellent resistance to weathering and environmental exposure
- Flexible elastomeric performance for joint movement
- Sandable after curing for smooth deck finishing
- Long toolability for controlled application
- Resistant to seawater and fresh water
- Optimized flow characteristics for deck joint filling
Technical Specifications
| Specification | Value |
|---|---|
| Chemical Base | 1-component polyurethane |
| Color | Black |
| Cure Mechanism | Moisture-curing |
| Density (uncured) | 1.3 kg/l (10.8 lb/gal) |
| Application Temperature | 5 to 35 °C (41 to 95 °F) |
| Skin Time | 90 minutes |
| Shrinkage | 3% |
| Shore A Hardness | 40 |
| Tensile Strength | 3 MPa (430 psi) |
| Elongation at Break | 600% |
| Tear Propagation Resistance | 10 N/mm (55 pli) |
| Service Temperature | -50 to 90 °C (-58 to 194 °F) |
| Shelf Life | 12 months |
Compatible Substrates and Materials
- Timber decking (marine applications)
Application Guidance
Surfaces must be clean, dry, and free from grease, oil, and contaminants before application. For timber substrates, the use of an appropriate primer such as Sika® Primer-215 is required. Apply using suitable dispensing equipment within the recommended temperature range, and tool within the available working time. Curing occurs through atmospheric moisture, and adhesion testing under actual conditions is recommended.
Typical Use Cases
- Caulking joints in traditional teak and timber boat decks
- Marine deck sealing for yachts and commercial vessels
- Repair and refurbishment of timber decking joints
- Sealing exposed joints in marine environments
Target Industries and Buyers
- Boat builders and yacht manufacturers
- Shipyards and marine repair facilities
- Marine decking installers
- Professional marine maintenance teams
Performance Advantages
Within the marine deck sealant category, Sikaflex®-290 DC PRO is engineered specifically for timber decking joints, offering a balance of flexibility, durability, and sanding capability. Its resistance to marine exposure and ability to accommodate joint movement make it well-suited for long-term deck sealing performance.
Common Questions
Q: What is Sikaflex®-290 DC PRO used for?
A: It is used for caulking joints in traditional timber marine decking.
Q: Is it suitable for marine environments?
A: Yes, it is designed for exposed marine conditions and resists seawater and fresh water.
Q: Can it be sanded after curing?
A: Yes, it cures to a finish that can be sanded for smooth deck surfaces.
Q: Does it require a primer?
A: Yes, primer such as Sika® Primer-215 is required for timber substrates.
Q: How does it cure?
A: It cures by reacting with atmospheric moisture.
Q: What is the application temperature range?
A: It can be applied between 5 °C and 35 °C (41 °F to 95 °F).
Q: What is the skin time?
A: The skin time is approximately 90 minutes under standard conditions.
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