Sika Sikaflex Pro 3
Sika Sikaflex Pro 3
Sikaflex PRO-3 — Polyurethane Sealant for Floor Joints & Civil Engineering
Sikaflex® PRO-3 is a 1-component, moisture-curing polyurethane elastic joint sealant based on Sika i-Cure® Technology, designed for floor joints and civil engineering applications. It provides a waterproof seal with good mechanical and chemical resistance, remaining elastic over a wide temperature range.
Key Features
- 1-component, moisture-curing — ready to use
- ±35% movement capability (ASTM C 719) / ±25% (ISO 9047)
- Bubble-free curing — uniform, defect-free seal
- Over-paintable (after full cure; non-flexible paint systems may crack)
- Very low emissions (GEV-Emicode EC1PLUS) — suitable for indoor environments
- Cleanroom certified (ISO 14644)
- LEED v4 EQc 2 compliant
Applications
- Floor joints — horizontal and vertical sealing in floors, pedestrian areas and traffic zones
- Food industry — floor and wall joints in food processing facilities
- Cleanrooms — certified cleanroom joint sealing
- Sewage treatment plants — chemical-resistant joint sealing
- Tunnels — structural joint sealing
- Car park decks — parking structure floor and ramp joints
- Warehouses and production floors — industrial floor joint sealing
Technical Data
| Property | Value |
|---|---|
| Chemical Base | Polyurethane i-Cure® Technology |
| Colour | Concrete grey (other colours on request) |
| Density | ~1.35 kg/l |
| Movement Capability | ±25% (ISO 9047) / ±35% (ASTM C 719) |
| Shore A Hardness | ~37 (after 28 days) |
| Elongation at Break | ~600% |
| Elastic Recovery | ~90% |
| Tear Propagation Resistance | ~8.0 N/mm |
| Service Temperature | -40°C to +70°C |
| Skin Time | ~60 minutes (23°C / 50% r.h.) |
| Tooling Time | ~50 minutes (23°C / 50% r.h.) |
| Curing Rate | ~3.5 mm / 24 hours (23°C / 50% r.h.) |
| Packaging | 600 ml cylindrical foil pack, 20 per box |
| Shelf Life | 15 months (unopened, dry storage) |
Limitations
- Not suitable for swimming pools or surrounding areas
- Not for use on bituminous substrates, natural rubber, or EPDM rubber
- Test for plasticiser migration before use on reconstituted or natural stone
- Do not expose uncured product to alcohol-containing materials
