Sikaflex®-295 UV
Sikaflex®-295 UV is a high-performance, one-component polyurethane adhesive and sealant designed for marine applications, particularly for bonding and sealing acrylic (PMMA) and polycarbonate (PC) windows and hatches.
Key Features
UV & Weather Resistance: Specifically formulated to withstand prolonged exposure to sunlight and harsh marine environments without cracking or chalking.
Excellent Adhesion: Provides strong bonding to various substrates, including aluminum, stainless steel, GRP (glass-reinforced plastic), timber, and 2-component coatings.
Non-Yellowing: Maintains aesthetic appearance over time, especially in white formulations.
Paintable & Sandable: Allows for finishing to match surrounding surfaces.
Fast Tack-Free Time: Achieves initial tack-free state in approximately 60 minutes at 23°C (73°F) and 50% relative humidity.
Good Gap-Filling Properties: Suitable for applications requiring a flexible sealant that can accommodate movement.
Technical Specifications | |
| Property | Value |
| Chemical Base | 1-component polyurethane |
| Cure Mechanism | Moisture-curing |
| Density (uncured) | ~1.3 kg/L |
| Shore A Hardness | 35 |
| Elongation at Break | 500% |
| Tensile Strength | 160 psi |
| Service Temperature | -40°C to +90°C |
| Skin Time | ~60 minutes |
| Open Time | ~45 minutes |
| Shrinkage | ~1% |
| Shelf Life | 12 months (storage below 25°C) |
Applications
Marine Industry: Bonding and sealing of acrylic and polycarbonate windows and hatches on boats and ships.
Exterior Sealing: Suitable for sealing joints in exposed areas where UV resistance is critical.
OEM Applications: Approved for original equipment manufacturer (OEM) use in marine constructions.
Safety & Handling
Surface Preparation: Ensure surfaces are clean, dry, and free from grease, oil, dust, and contaminants. Refer to Sika® Pre-treatment Chart for specific guidelines.
Application Temperature: Optimal application between 10°C and 35°C (50°F to 95°F).
Curing: Cures upon exposure to atmospheric moisture; curing speed may vary with temperature and humidity.
Chemical Resistance: Resistant to fresh water, seawater, diluted acids, and diluted caustic solutions; temporarily resistant to fuels, mineral oils, vegetable and animal fats and oils; not resistant to organic acids, glycolic alcohol, concentrated mineral acids, caustic solutions, or solvents.
Storage: Store below 25°C (77°F); shelf life is 12 months for cartridges and Unipac containers.
