Technical Data Sheet
| Document | RY-TDS-901 |
|---|---|
| Revision | Rev. 1.0 |
| Issue date | July 2026 |
| Status | Issued |
Rayson PatchBond · Repair mortars & compounds
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.
MortarBond EM90 rebuilds damaged concrete with epoxy strength. The three components — resin, hardener and graded aggregate — combine into a trowelable mortar that hardens without shrinkage to a compressive strength of 80 N/mm² at 7 days, well above the concrete around it.
Body coat.
Figure 1 — Typical system build-up (top to bottom). Layer thicknesses are system-dependent; confirm the specification for your project.
| Surface preparation | Substrate must be sound, clean and free of oil, grease, laitance, loose material and bond-inhibiting contaminants. Prepare concrete mechanically (captive shot blasting, milling or diamond grinding); remove weak concrete, open blowholes and voids, and reinstate imperfections with a suitable Rayson repair product. Vacuum all dust. New concrete should be at least 28 days old. |
|---|---|
| Mixing / dilution | Mix ratio Part A : Part B : Part C = 2 : 1 : 30 by kg; no thinner required; pot life 45 minutes at 30 °C |
| Application method | Steel trowel |
| Coverage | Available from the Rayson technical team on request. |
| Application conditions | Minimum substrate temperature 5 °C; substrate moisture content max 5%; minimum mixing temperature +10 °C; cure between +10 °C and +35 °C; prepared substrate pull-off strength above 1.5 N/mm². |
| Drying & curing | Touch dry 4 hours at 30 °C; hard dry 16 hours; full cure 7 days |
| Recoat interval | Available from the Rayson technical team on request. |
| Film / thickness | Placed and trowelled to the required repair depth. |
| Pack sizes | 33 kg set (Part A 2 kg resin, Part B 1 kg hardener and Part C 30 kg aggregate) |
| Storage | Store in unopened original packaging in a cool, dry, covered area out of direct sunlight. |
| Shelf life | Available from the Rayson technical team on request. |
Figure 2 — Application workflow. Each stage is a hold point: confirm the previous stage is complete and within specification before proceeding.
Floor repair and recoat
Two-component product. Wear gloves, eye protection and suitable respiratory protection where ventilation is limited. Avoid skin and eye contact. Keep out of reach of children. Consult the Safety Data Sheet (in preparation) before use.