Standard primed floor system
- Mechanically prepare and vacuum the substrate
- Prime with Rayson PrimeBond E25
- Apply the specified Rayson body coat or finish
Rayson PrimeBond · Epoxy
Rayson PrimeBond E25
Rayson PrimeBond E25 is a two-component, medium-viscosity, solvent-free epoxy bonding primer for dry or damp substrates — formulated to wet out and anchor to highly absorbent concrete, screed, asphalt and prepared metal.
ConcreteCement screed TDS RY-TDS-102
Best for
Best for priming porous, highly absorbent concrete and screeds — and asphalt or prepared metal — before Rayson resin floor systems, including in enclosed, unventilated areas.
PrimeBond E25 pairs a milky epoxy resin with an amber-brown hardener into a medium-viscosity, solvent-free primer built for absorbency: on thirsty concrete and screed it soaks in and seals the surface rather than sitting on top, giving the floor system above it the grip it depends on.
Carrying no solvent, it can be used where ventilation is limited, and it accepts dry or damp substrates alike — useful on ground-bearing slabs in Malaysia’s humidity. On mechanically prepared concrete its bond outperforms the substrate: pull-off tests fail in the concrete, not at the primer line.
It primes new and existing concrete, cementitious screeds, sound existing epoxy floors, asphalt and mechanically prepared metal, and is overcoated with the specified Rayson body coat or finish.
In Malaysia
Supplied by Epovex Coatings Sdn. Bhd., Company No. 202601042128 (1704223-A). The Malaysia launch is scheduled for 1 March 2027; confirm availability and lead time for your project. Installation through an authorised applicator in Johor, Kuala Lumpur or Penang introduced by Rayson, who quotes and warrants the workmanship, or by your own crew with Rayson’s application guidance.
Send an enquiryKey benefits
- Solvent-free — usable in unventilated and enclosed areas
- Especially suited to highly absorbent substrates
- Applies to dry or damp surfaces
- Excellent adhesion to mechanically prepared surfaces — bond strength exceeds concrete cohesion
Recommended uses
- Priming highly absorbent concrete and cementitious screeds
- Priming new and existing concrete before Rayson floor systems
- Priming sound existing epoxy flooring before recoating
- Priming asphalt surfaces before compatible overlays
- Priming mechanically prepared metal
- Priming in enclosed or unventilated areas where solvent primers cannot be used
Application
- Roller
- Brush
- Airless spray
| Specification | Data sheet value |
|---|---|
| Coverage | 6–8 m² per kg per coat, varying with substrate condition and porosity |
| Mixing | Two pre-weighed parts, mix ratio 4:1 (A:B) by weight; mix mechanically for at least 2–3 minutes; pot life up to 30 minutes at 30 °C |
| Drying and curing | Final cure 7 days |
| Pack sizes | Part A 4 kg / Part B 1 kg per set, or Part A 16 kg / Part B 4 kg per set |
Typical systems
Absorbent-substrate system
- Mechanically prepare porous concrete or screed
- Prime with Rayson PrimeBond E25 to seal and bind the surface
- Overcoat with the specified Rayson floor system
Limitations
- Minimum substrate temperature 5 °C; mix and cure between +10 °C and +35 °C
- Substrate moisture content must not exceed 5% — damp is acceptable, standing water is not
- Prepared substrate must reach at least 1.5 N/mm² pull-off strength
- Mixed material must be used within its pot life; cures faster in hot weather and in large batches
- Not a wearing surface — must be overcoated with a Rayson body coat or finish
Not suitable for
- Use as a finished wearing surface without an overcoat
- Substrates with standing water or moisture content above 5%
- Slabs with active rising damp or hydrostatic pressure without a specialist barrier system
- UV-exposed surfaces left uncoated — epoxy will yellow and chalk outdoors
Used with
Jobs and industries
Jobs that use Rayson PrimeBond E25
Rayson-authorised applicators in Johor, Kuala Lumpur and Penang install Rayson PrimeBond E25 on these jobs and in these industries; its layer is marked in each build-up. You can also order it direct and apply it yourself, with the step-by-step guide. Each page shows how the work runs, what to send for a quotation and what decides the price.
Order it direct, with a step-by-step guide
01 Rayson system
Epoxy floor paint
FloorGuard R50 over PrimeBond E20, or water-based HydroShield WE40, sold direct with a step-by-step guide: apply it yourself, or have the applicator do it.
- FloorGuard R50, second coat
- FloorGuard R50, first coat, 0.3 to 0.5 kg/m²
- PrimeBond E20 primer, 6 to 8 m² per kg
- Concrete at least 28 days old, ground and vacuumed
Ramps: aggregate broadcast into the first coat for grip. Water-based: HydroShield WE40, its own primer. Porches open to the sun: UraForce SB72 over PrimeBond S30.
Quoted per orderBy industry, across Malaysia
Industries we cover ↗ 02 Rayson system
Commercial and central kitchen floors
Cooking lines, dishwash and prep areas in central, hotel and restaurant kitchens: PU-cement where it is hot, epoxy where it is dry.
- PurScreed PC70 PU-cement screed, 1.5–3 mm
- Slab, old tiles removed, coves and drains detailed
Cold prep, stores and corridors: FloorGuard R50 broadcast with aggregate, over PrimeBond E20.
Quoted after inspection The practical details
Rayson PrimeBond E25: questions people ask
What substrates is PrimeBond E25 best suited to?
It is formulated for highly absorbent concrete and cementitious screeds, where its medium viscosity lets it soak in and seal the surface. It also primes new and existing concrete, sound existing epoxy floors, asphalt and mechanically prepared metal.
Can PrimeBond E25 be applied to damp concrete?
Yes — it accepts dry or damp substrates, provided there is no standing water and substrate moisture stays at or below 5%. For wetter slabs or active moisture ingress, speak to our technical team first.
What is the mixing ratio and pot life?
The two pre-weighed parts mix at 4:1 (A:B) by weight, stirred mechanically for 2–3 minutes. Pot life is up to 30 minutes at 30 °C, and mixed material cures faster in hot weather and in larger batches.
How does it differ from PrimeBond E20?
Both are solvent-free epoxy bonding primers usable in unventilated areas, with coverage around 6–8 m² per kg per coat. E25 mixes 4:1 by weight and is aimed at highly absorbent substrates; E20 mixes 2:1.
Is it suitable for enclosed spaces?
Yes — being solvent-free, it is stated as suitable for unventilated areas. Standard PPE and good working practice still apply; consult the SDS once available.
Start a conversation / ↗
Send the job, or ask for materials
Tell us what the surface is, where it is and what it has to withstand. Rayson replies with a system recommendation; for installation, the applicator for your area in Johor, Kuala Lumpur or Penang is introduced to quote the job.
Malaysia launch: 1 March 2027. Enquiries are welcome now; supply, site assessment and installation timing are confirmed for each project.