Technical Data Sheet
| Document | RY-TDS-1104 |
|---|---|
| Revision | Rev. 1.0 |
| Issue date | July 2026 |
| Status | Issued |
Rayson SealForce · Polyurea waterproofing membranes
Rayson SealForce SP210 is a hot spray-applied, 100% solids pure polyurea membrane that forms a seamless, potable-grade waterproof lining on concrete and steel tanks, reservoirs and containment structures.
SealForce SP210 is Rayson's potable-grade spray polyurea: a two-component, 100% solids elastomer applied by heated spray plant that sets in seconds to a seam-free membrane on concrete and steel. It is certified for contact with drinking water (WRAS / BS 6920 in the UK), making it a lining as much as a coating.
Standalone coating.
Figure 1 — Typical system build-up (top to bottom). Layer thicknesses are system-dependent; confirm the specification for your project.
| Surface preparation | Concrete and steel are prepared to the project method statement — profiled, clean and dry — and primed with the specified system. Apply only where the substrate is at least 3 °C above the dew point and relative humidity is below 85%. |
|---|---|
| Mixing / dilution | Two components metered and mixed in the heated spray gun at a 1:1 volume ratio (1.12:1 by weight); components pre-heated to ~25 °C and hoses controlled to about 70 °C; Part B power-mixed before use |
| Application method | Hot airless spray (plural-component) |
| Coverage | 1.0 litre/m² per mm dry film; typically 1.5 mm wet film in one coat |
| Application conditions | Applied by heated plural-component spray plant by specialist applicators; substrate at least 3 °C above dew point, RH below 85%. |
| Drying & curing | Gel time 5–20 s at 60 °C; walk-on ~10 minutes at 20 °C; light duty ~4 hours; 100% cure ~4 days (WRAS use requires 20 days at 7 °C minimum) |
| Recoat interval | Minimum recoat a few minutes after the previous pass; consult the method statement for maximum windows before reactivation. |
| Film / thickness | Applied at 1.0 litre/m² per mm dry film, typically 1.5 mm wet film in one coat. |
| Pack sizes | 400 litre unit (Part A + Part B) |
| Storage | Keep sealed in the supplied containers, in a dry store at normal room temperature. Shelf life about 6 months from shipment. |
| Shelf life | Approximately 6 months from shipment in unopened original containers. |
Figure 2 — Application workflow. Each stage is a hold point: confirm the previous stage is complete and within specification before proceeding.
Potable tank / reservoir lining
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.