Solvent-free — usable in unventilated and enclosed areas
Priming new and existing concrete before Rayson floor coatings
Rayson PrimeBond E20
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.
Best for
Best for priming concrete and cementitious screeds before Rayson epoxy and polyurethane floor systems, including slabs that cannot be fully dried out.
Real product · Interactive depth view Rayson PrimeBond
Product system Rayson PrimeBond E20
Part A 13.34 kg can + Part B 6.66 kg can RY-TDS-101
Rayson PrimeBond E20 has one clearly defined, verifiable job in the coating system.
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. Best for priming concrete and cementitious screeds before Rayson epoxy and polyurethane floor systems, including slabs that cannot be fully dried out.
Applies to dry or damp surfaces
Priming cementitious screeds, including highly absorbent substrates
Excellent adhesion to mechanically prepared substrates — bond strength exceeds concrete cohesion
Priming over sound existing epoxy flooring before recoating
Build the bond on damp or dry concrete.
A solvent-free epoxy primer that anchors resin flooring to prepared concrete and screed—even where the slab cannot be fully dried.
A controlled route to applying Rayson PrimeBond E20.
This sequence supports early planning. It does not replace the current Technical Data Sheet, approved method statement or project-specific technical review.
- 01
Inspect and prepare the substrate
New and existing concrete (minimum 28 days old, moisture content below 5%)
- 02
Prepare the material as specified
Two pre-weighed parts, mix ratio 2:1 (A:B) by weight; mix mechanically for at least 2–3 minutes; pot life up to 30 minutes at 30 °C
- 03
Apply with the correct tools
Recommended methods: Roller, Brush, Airless spray. Confirm coat count and thickness for the project.
- 04
Protect through the required cure
Final cure 7 days
Coating system cutaway
Every layer has a job—from prepared substrate to service surface.
This diagram explains a typical system position, not a fixed specification. Primer, body coat, finish, thickness and detailing must be confirmed for the project.
Position in the system Primer
Rayson PrimeBond E20 serves as the primer. Confirm the complete build-up against the substrate, exposure and project requirements.
Related system products
Review primers, body layers, finishes or specialist components connected to this product.
- Compatible body coat and finishSelected for the service exposure and complete system
- Rayson PrimeBond E20Primer · Epoxy
- Correctly prepared substrateNew and existing concrete (minimum 28 days old, moisture content below 5%)
Four project facts for faster system screening.
These current product figures support early selection. Confirm the final build-up, quantity and application conditions against the Technical Data Sheet and site conditions.
- Coverage
- Coverage
- Mixing & working time
- Mixing
- Drying & curing
- Curing
- Pack configuration
- Pack
6–8 m² per kg per coat, varying with substrate condition and porosity
Two pre-weighed parts, mix ratio 2:1 (A:B) by weight; mix mechanically for at least 2–3 minutes; pot life up to 30 minutes at 30 °C
Final cure 7 days
Part A 13.34 kg can + Part B 6.66 kg can
Confirm the substrate and real service environment before specifying.
Choose it when
- Priming new and existing concrete before Rayson floor coatings
- Priming cementitious screeds, including highly absorbent substrates
- Priming over sound existing epoxy flooring before recoating
- Priming asphalt surfaces before compatible overlays
- Priming mechanically prepared metal surfaces
Relevant applications
Relevant industries
Choose something else when
- Minimum substrate temperature 5 °C; curing between +10 °C and +35 °C
- Substrate moisture content must not exceed 5% — damp is acceptable, standing water is not
- 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
- 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
Other Rayson products to evaluate
These links continue the comparison; they are not automatic substitutes. Confirm the substrate, exposure and complete build-up before selection.
Substrate requirements+
- New and existing concrete (minimum 28 days old, moisture content below 5%)
- Cementitious screeds, including highly absorbent substrates
- Sound existing epoxy flooring
- Asphalt
- Mechanically prepared metal
Technical documents and project support
Ready to specify Rayson PrimeBond E20? Give Rayson the site conditions.
Send the area, substrate condition, expected traffic or exposure, required finish and programme. The technical team can help review the system build-up and estimated quantity.
What to know before specifying Rayson PrimeBond E20.
Can PrimeBond E20 be applied to damp concrete?
Yes — it is formulated for dry or damp substrates, provided there is no standing water and substrate moisture does not exceed 5%. For slabs above that, or with active moisture ingress, speak to our technical team before specifying.
Do I always need a primer under a Rayson floor coating?
In almost all cases, yes. The primer seals porosity, prevents pinholing in the body coat and provides the adhesion the whole system relies on. Skipping it is the most common cause of coating failure.
How soon can the next coat go on?
The primer must be firm enough to walk on but still within its overcoat window. Confirm exact recoat times with our technical team for your programme.
Is it safe to use in enclosed spaces?
PrimeBond E20 is solvent-free and stated as suitable for unventilated areas. Standard PPE and good working practice still apply; consult the SDS once available.
What surface preparation is required?
Mechanical preparation — captive shot blasting, milling or diamond grinding — to a sound, open, dust-free surface. Weak concrete must be removed, defects filled, and all dust vacuumed off before priming.
Can it go over an old epoxy floor?
Yes, provided the existing coating is sound and well bonded. Abrade the surface, clean thoroughly and carry out an adhesion trial first.
Related products
Body LevelShield
Rayson LevelShield SL120
Self-smoothing · solvent-free
Rayson LevelShield SL120 is a solvent-free, two-component, self-smoothing epoxy floor system that delivers a seamless wearing surface with medium to heavy chemical resistance and high mechanical strength.
Repair PatchBond
Rayson MortarBond EM90
Three-part · 33 kg kit
Rayson MortarBond EM90 is a three-pack, solvent-free epoxy mortar — resin, hardener and graded aggregate — that reinstates concrete floors with a non-shrink, highly abrasion-resistant repair.
Finish UraForce
Rayson UraForce SB72
UV-stable polyurethane finish
Rayson UraForce SB72 is a two-component, solvent-based polyurethane floor finish that holds its colour and high gloss under strong UV while resisting abrasion and a broad range of chemicals.
Body FloorGuard
Rayson FloorGuard R50
Smooth or anti-slip finish
Rayson FloorGuard R50 is a two-component, solvent-free high-solids epoxy floor coating that cures to a smooth gloss — or a slip-resistant finish when broadcast with aggregate — for concrete and screed under normal to medium-heavy wear.