Rayson PrimeBond S30 is a two-part, low-viscosity, solvent-based epoxy primer that penetrates and seals prepared concrete, pavements and mineral substrates before coating.
Best for priming dense or absorbent concrete on car park decks, ramps, walkways and industrial floors where deep penetration is needed.
PrimeBond S30 uses a low-viscosity, solvent-based epoxy formulation to soak into prepared concrete and bind the surface before the floor system goes down. The two parts mix 1:1 and react to form a long-lasting sealing coat with excellent adhesion — pull-off testing on prepared concrete produces failure in the concrete, not the primer.
Its penetration makes it well suited to dense concrete, where two thin coats wet out the surface far better than one heavy application, and to porous or highly absorbent substrates such as pavements, ramps and loading bays. The cured film shows excellent impact and chemical resistance.
As a solvent-based product, PrimeBond S30 needs adequate ventilation during application and cure. For occupied buildings or enclosed spaces where odour is a constraint, consider the solvent-free PrimeBond E20 or water-based PrimeBond W10 instead.
A primer is the first coat. It seals and strengthens the surface and creates the bond the rest of the system relies on. It is not a wearing surface on its own.
The figures below are a guide for planning. Site conditions and workmanship affect results — confirm the details for your project with our technical team.
| Coverage | 5–6 m² per litre per coat; minimum 2 coats on normal or dense concrete — varies with substrate porosity |
|---|---|
| Mixing | Two pre-weighed parts, mix ratio 1:1 by weight; mix mechanically for at least 2–3 minutes; pot life up to 30 minutes at 28 °C |
| Drying & curing | Final cure 7 days; minimise heavy traffic for 8 hours after application on pavements |
| Pack sizes | Part A 10 litres / Part B 10 litres per set |
Dense, power-floated concrete absorbs very little primer, and porous concrete absorbs unevenly. Two thinner coats achieve consistent wetting and a uniform seal, which prevents defects in the finish coats above.
Only with adequate ventilation during application and cure — it is solvent-based. For enclosed or occupied areas, PrimeBond E20 (solvent-free) or PrimeBond W10 (water-based) are the safer choices.
Keep heavy traffic off for at least 8 hours after application on pavements, and note the primer itself is not the wearing surface — full return to service depends on the complete system. Confirm programme timings with our technical team.
Mechanical preparation by shot blasting, milling or diamond grinding to a sound, open surface, with weak concrete removed, defects patched and all dust vacuumed off.
Substrate moisture must not exceed 5%. For slabs that cannot meet this, PrimeBond E20 tolerates damp surfaces — discuss the slab condition with our technical team.
Rayson PrimeBond E20 is a two-component, medium-viscosity, solvent-free epoxy bonding primer that anchors resin floor systems to concrete, screed, asphalt and prepared metal — on dry or damp substrates.
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Answers from Rayson's own product information
Guidance only — confirm specifications with the Rayson technical team.