Non-shrink repair with compressive strength of 80 N/mm² at 7 days
Repairing spalls, potholes and worn areas in concrete floors
Rayson MortarBond EM90
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.
Best for
Best for trowel-applied repair and reinstatement of damaged concrete floors before coating, and for building durable epoxy mortar patches in trafficked areas.
Real product · Interactive depth view Rayson PatchBond
Product system Rayson MortarBond EM90
33 kg set (Part A 2 kg resin, Part B 1 kg hardener and Part C 30 kg aggregate) RY-TDS-901
Rayson MortarBond EM90 has one clearly defined, verifiable job in the coating system.
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. Best for trowel-applied repair and reinstatement of damaged concrete floors before coating, and for building durable epoxy mortar patches in trafficked areas.
Tough, highly abrasion-resistant — survives forklift traffic
Reinstating joint edges and arrises before coating
Good resistance to chemicals and solvents
Forming durable epoxy mortar patches in trafficked areas
Rebuild damaged floors for hard traffic.
A non-shrink epoxy mortar for reinstating concrete floors and creating abrasion-resistant repairs in trafficked areas.
A controlled route to applying Rayson MortarBond EM90.
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
Concrete floors, mechanically prepared and primed with a compatible epoxy primer
- 02
Prepare the material as specified
Mix ratio Part A : Part B : Part C = 2 : 1 : 30 by kg; no thinner required; pot life 45 minutes at 30 °C
- 03
Apply with the correct tools
Recommended methods: Steel trowel. Confirm coat count and thickness for the project.
- 04
Protect through the required cure
Touch dry 4 hours at 30 °C; hard dry 16 hours; full 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 Body coat
Rayson MortarBond EM90 serves as the body coat. 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.
- Reinstated surface / subsequent coatingSelected for the repair scope and subsequent system
- Rayson MortarBond EM90Body coat · Epoxy
- Correctly prepared substrateConcrete floors, mechanically prepared and primed with a compatible epoxy primer
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
Refer to the Technical Data Sheet
Mix ratio Part A : Part B : Part C = 2 : 1 : 30 by kg; no thinner required; pot life 45 minutes at 30 °C
Touch dry 4 hours at 30 °C; hard dry 16 hours; full cure 7 days
33 kg set (Part A 2 kg resin, Part B 1 kg hardener and Part C 30 kg aggregate)
Confirm the substrate and real service environment before specifying.
Choose it when
- Repairing spalls, potholes and worn areas in concrete floors
- Reinstating joint edges and arrises before coating
- Forming durable epoxy mortar patches in trafficked areas
Relevant applications
Relevant industries
Choose something else when
- Mixed mortar must be placed within its 45-minute pot life at 30 °C
- Requires a compatible epoxy primer for reliable adhesion
- Full mechanical and chemical service only after 7-day cure
- Epoxy chemistry — repairs left uncoated outdoors will yellow
- Vertical or overhead repairs — use Rayson PatchBond TX80 thixotropic compound
- Large-area screeding duties — it is a repair mortar
- Uncoated exterior exposure where colour stability matters
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+
- Concrete floors, mechanically prepared and primed with a compatible epoxy primer
Technical documents and project support
Ready to specify Rayson MortarBond EM90? 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 MortarBond EM90.
How strong is the cured mortar?
Compressive strength reaches 80 N/mm² at 7 days — several times stronger than typical floor slab concrete.
Does it shrink as it cures?
No — the epoxy binder hardens without shrinkage, so patches stay tight to their edges instead of debonding.
Does the repair need a primer?
Yes, a compatible epoxy primer applied to the prepared repair area. Rayson recommends PrimeBond E20, with final system pairing to be confirmed by our technical team.
How soon can the repair take traffic?
Indicatively hard dry in 16 hours at 30 °C, with full cure and chemical resistance at 7 days. For heavy loading, confirm timing with our technical team.
Can it be feather-edged?
Epoxy mortars perform best at a defined minimum thickness with cut edges rather than feathering. Square-cut the repair perimeter for a durable result.
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