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Floor joints in warehouses, car parks and industrial facilities have to tolerate more than occasional movement. Sikaflex® PRO-3 Purform® is a one-component elastic polyurethane sealant for specified floor and civil-engineering joints exposed to mechanical wear, traffic and demanding service conditions.
For trafficable and industrial joint sealing
Typical applications include suitable joints in production floors, warehouses, car parks, pedestrian areas and selected civil structures. Its high movement capability and mechanical resistance make it a specialist option for demanding floor joints rather than a general household gap filler.
Design the joint as a system
Sika states movement capability of ±25% to ISO 9047 and ±50% to ASTM C719 under the respective test methods. Joint dimensions, backing rod, substrate preparation and chemical exposure must be checked against the actual specification. For fire-resisting joint assemblies, see Sikaflex-400 Fire, which addresses a different performance requirement.
- Sound prepared concrete, mortar and masonry
- Other approved joint substrates subject to adhesion testing and primers
Sikaflex® PRO-3 Purform® Physical Properties
| Property | Value |
|---|---|
| Base | One-component polyurethane with Purform technology |
| Movement to ASTM C719 | ±50% |
| Movement to EN 14188-2 | ±35% |
| Movement to EN ISO 9047 | ±25% |
| Shore A hardness | Approximately 40 after 28 days |
| Service temperature | −40°C to +80°C |
| Skin time at 23°C / 50% RH | Approximately 50 minutes |
| Tooling time at 23°C / 50% RH | Approximately 40 minutes |
| Curing rate at 23°C / 50% RH | Approximately 3.5 mm / 24 h |
| Joint width guidance | 8–40 mm for movement joints |
| Potable-water approval | AS/NZS 4020:2018 for specified contact |