Sikaflex-221
Multi-purpose polyurethane adhesive and sealant (Construction 221).
Overview
Multi-purpose one-component polyurethane adhesive and sealant. Wide adhesion range — metals, primed surfaces, ceramics and plastics. Sandable and paintable.
Ideal for
- Sealant
- Polyurethane
Technical data
| Coverage | Depends on joint dimension. |
|---|---|
| Mixing ratio | Single component — moisture curing. Ready to use. |
| Pot life | Skin time ~60 min · Open time ~45 min (23°C / 50% r.h.) |
| Substrate temperature | +5°C to +40°C (optimum +15°C to +25°C) |
| Shelf life | 12 months stored below +25°C |
| Standards | EN45545-2 R1/R7 HL3 · ISO 527 (1.8 MPa tensile) · ISO 34 · Elongation at break 500% |
How to apply
- 1
Prepare the surface
Work on a clean, sound substrate free of dust, oil, curing compounds and loose particles. Keep the substrate temperature within +5°C to +40°C (optimum +15°C to +25°C).
- 2
Mix the components
Combine at Single component — moisture curing. Ready to use. and mix to a smooth, lump-free, uniform consistency.
- 3
Apply
Apply evenly across the surface Depends on joint dimension..
- 4
Respect the working time
Use the mixed material within its pot life (Skin time ~60 min · Open time ~45 min (23°C / 50% r.h.)) and let it cure fully before the next coat or before putting the area into service.
Always follow the current Sika product data sheet for full surface preparation and application details.
Buy with confidence
100% genuine Sika
Authorised stock through Ali Traders batch-coded and sealed.
Flat-rate delivery
Rs. 199 anywhere in Pakistan, free over Rs. 19,999.
Delivered in 3 days
Dispatched to all areas of Pakistan.
Flexible payment
Cash on delivery, bank transfer or WhatsApp.
