The leak rarely begins where the stain appears. Rayson matches the repair, primer, membrane and finish to the structure, water path and exposure—not merely the visible symptom.
A roof, wet area, deck and tank do not fail in the same way. Start with where water arrives, how the structure moves and what happens above the membrane. Then choose a route with published product data—not a generic waterproof paint.
Choose where the water is working. The system route, evidence and enquiry brief update with your selection.
Roof waterproofing starts at falls, drains, corners and existing-coating condition. A UV-stable membrane is only useful once the surface and details are ready for it.
Wet-area waterproofing is less about a large open floor and more about the wall-floor cove, drain edge, penetrations and finish above the membrane.
Exposed decks need a continuous waterproof route beneath a finish that is matched to tyres, turning, grip, cleaning and the return-to-service window.
Tanks, reservoirs and containment structures may need a spray-applied polyurea lining with the correct preparation, equipment and specification evidence.
It fails where the surface changes direction, moves, drains or meets another material. A robust system makes those details visible before the first coat goes down.
Ask Rayson to review the detailsStart with the structure and failure risk, then use the relevant TDS to confirm the build-up.
For suitable exposed roofs needing UV stability, continuity around details and a route that is checked against the actual water path.
Confirm the build-up against the TDS and actual roof condition before specification.For suitable wet areas, roofs and decks where drains, junctions and a compatible finish need one continuous liquid-applied route.
Check drainage, detail reinforcement and exposure before programming the work.For suitable tanks, containment and structural linings where continuous specialist spray application is required.
Specialist hot spray-applied pure polyurea membrane for suitable concrete and steel linings.
Specialist spray-applied pure polyurea lining for suitable water-retaining and containment work.
Negative-side pressure, unsuitable buried conditions, saturated substrate, moving structural cracks and chronic ponding from failed falls need structural, drainage or membrane-design correction before a liquid coating system is considered.
Rayson works from the actual structure: assess the substrate, correct water-management issues, repair and reinforce local details, use a compatible primer where required, then build the membrane and finish around the working conditions.
The final product sequence, consumption and application conditions remain subject to the relevant product TDS and site assessment.
Typical build-up · top to bottom
Specification sequence
These are starting routes, not a substitute for an assessment. Open the PDF before programming product use, preparation, thickness or return-to-service timing.
Two-component aliphatic polyurea waterproofing membrane for suitable exposed roofs.
Two-component polyurea-based liquid membrane for suitable wet areas, roofs and car-park deck work.
Specialist hot spray-applied pure polyurea membrane for suitable concrete and steel linings.
Specialist spray-applied pure polyurea lining for suitable tank, reservoir and containment work.
Send overview and detail photos, the structure type, the approximate area, existing condition and your access window. You will receive an initial response within one working day.
Answer four questions about your surface and conditions to shortlist suitable Rayson systems.
Find your systemEstimate material quantities from your floor area, coats and coverage rate.
Estimate quantitiesOpen technical data sheets for every Rayson product — no forms, no gating.
Open the libraryExposed roofs need a UV-stable waterproofing membrane, sound substrate preparation, reinforced details at drains and corners, and correct falls so water does not stand. Rayson SealForce RC40 is the cold-applied aliphatic polyurea route for suitable exposed roofs; confirm the complete build-up against RY-TDS-1101 before work begins.
A protective finish mainly manages weathering and UV exposure. A waterproofing membrane is selected to form a continuous, liquid-tight layer across the surface and details. The right route depends on the structure, water path, movement, traffic and whether water is acting from above or below.
Only when the existing layer is sound, dry enough, clean and compatible with the proposed route. Loose, waterlogged or debonded areas must be removed and repaired first. A site review, adhesion check and small trial area establish the correct preparation.
Wet areas require a seamless membrane, carefully reinforced drains and wall-floor junctions, compatible finishes and correct falls. SealForce RC30 is a two-component roller-applied polyurea-based membrane for suitable wet-area, roof and deck work; verify details against RY-TDS-1102.
Spray-applied polyurea is a specialist route for seamless linings on appropriate tanks, containment and concrete or steel structures. SealForce SP200 and SP210 require heated plural-component spray equipment. Product suitability, substrate condition and any certification requirement must be confirmed against the relevant TDS.
Live structural cracks, persistent ponding caused by failed falls, saturated substrates, negative-side pressure and unsuitable buried conditions can defeat a liquid coating system. In those cases, the structure, drainage, repair method or membrane design must be corrected first.
Send overview and close-up photos, the structure type, approximate area, where water appears, current coating or membrane condition, access constraints and the preferred work window. That gives the technical team a useful starting point before recommending a route.
Tell us your surface, area and timeline — our Singapore technical team will recommend a practical system and price it fast.
Rayson assistant
Answers from Rayson's own product information
Guidance only — confirm specifications with the Rayson technical team.