Technical Data Sheet
| Document | RY-TDS-601 |
|---|---|
| Revision | Rev. 1.0 |
| Issue date | July 2026 |
| Status | Issued |
Rayson PurScreed · Polyurethane-cement systems
Rayson PurScreed PC70 is a four-part, water-based polyurethane-cement self-smoothing screed installed at 1.5–3 mm for medium to heavy-duty industrial floors with high chemical resistance.
PurScreed PC70 combines four pre-weighed parts into a coloured, self-smoothing polyurethane-cement hybrid screed. Installed at 1.5–3 mm by steel trowel, it produces a floor with tough mechanical and chemical resistance for rough, high-traffic industrial service.
Body coat.
Figure 1 — Typical system build-up (top to bottom). Layer thicknesses are system-dependent; confirm the specification for your project.
| Surface preparation | Substrate must be sound, clean and free of oil, grease, laitance, loose material and bond-inhibiting contaminants. Prepare concrete mechanically (captive shot blasting, milling or diamond grinding); remove weak concrete, open blowholes and voids, and reinstate imperfections with a suitable Rayson repair product. Vacuum all dust. New concrete should be at least 28 days old. |
|---|---|
| Mixing / dilution | Combine Parts A, B, C and D in the sequence stated in the current PurScreed PC70 method statement; mix mechanically until uniform; pot life 15–20 minutes at 30 °C |
| Application method | Steel trowel |
| Coverage | 1.8 kg/m² per mm of thickness (varies with substrate condition) |
| Application conditions | Minimum substrate temperature 5 °C; substrate moisture content max 5%; minimum mixing temperature +10 °C; cure between +10 °C and +35 °C; prepared substrate pull-off strength above 1.5 N/mm². |
| Drying & curing | Final cure 7 days |
| Recoat interval | Available from the Rayson technical team on request. |
| Film / thickness | Applied as a self-smoothing screed in the order of 1.5–3 mm. |
| Pack sizes | Part A 3 kg / Part B 3 kg / Part C 14 kg / Part D 0.5 kg per set |
| Storage | Minimum 12 months at 5–35 °C in unopened original packaging; protect from direct sunlight. |
| Shelf life | Minimum 12 months unopened in original packaging. |
Figure 2 — Application workflow. Each stage is a hold point: confirm the previous stage is complete and within specification before proceeding.
Heavy-duty F&B production floor
Layered heavy-traffic build-up
Two-component product. Wear gloves, eye protection and suitable respiratory protection where ventilation is limited. Avoid skin and eye contact. Keep out of reach of children. Consult the Safety Data Sheet (in preparation) before use.