Sikaflex 252 300ml black one-component polyurethane adhesive for metal, GRP laminates, plastics, ceramic materials, flexible
Product code: 54669
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Product description
Sikaflex-252 black 300 ml is a one-component, non-flowing polyurethane sealant-adhesive designed for the assembly and sealing of large parts in commercial vehicles. It cures with air moisture, fills joints perfectly and dampens vibrations.
Advantages and unique properties
- One-component – ready for immediate use without mixing
- Non-sag consistency – does not run off vertical surfaces
- High flexibility – effective vibration damping
- Can be painted after initial curing
- Electrically non-conductive
- Resistant to dynamic loads
Properties and uses
- Base: one-component polyurethane
- Color: black
- Density (unprocessed): 1.2 kg/l
- Application temperature: 10–35 °C
- Open time: ≈ 35 min (23 °C / 50 % RH)
- Skin formation time: ≈ 40 min (23 °C / 50 % RH)
- Shore A hardness: 50
- Tensile strength: 3 MPa
- Elongation at break: 400 %
- Resistance to crack propagation: 7 N/mm
- Shear strength: 2.5 MPa
- Operating temperature: –40 °C to +90 °C (4 h), short-term +130 °C / +150 °C (1 h)
- Application: assembly and sealing of painted metals, GRP laminates, ceramics and plastics in bus, camper and truck bodies
Technical parameters
| Parameter | Value |
|---|---|
| Cartridge volume | 300 ml |
| Base | One-component polyurethane |
| Density | 1.2 kg/l |
| Open time | 35 min |
| Surface layer time | 40 min |
| Shore A hardness | 50 |
| Tensile strength | 3 MPa |
| Elongation at break | 400 % |
| Crack propagation resistance | 7 N/mm |
| Shear strength | 2.5 MPa |
| Operational temperature | –40 °C to +90 °C, +130 °C/150 °C short term |
| Shelf life | 12 months (stored < 25 °C) |
Storage recommendations
Store in a dry place at +5 °C to +25 °C, protected from direct sunlight and frost. Keep in original, closed packaging.
Instructions for use
- Clean, degrease and dry surfaces.
- Shake the cartridge thoroughly before use and insert into the application gun.
- Apply at 10–35 °C; ideally 15–25 °C.
- Form the sealant in a triangle shape for even thickness.
- Join parts within 35 min open time.
- Smooth the surface within 40 min, e.g. with Sika Tooling Agent N.
- Remove unprocessed material with Sika Remover-208; cured mechanically.
- After completion, clean tools and hands with Sika Cleaner-350H and water.
Product safety
Responsible person in the EU
Sika Poland Sp. z o.o.
Karczunkowska 89
02-871 Warszawa, Poland
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