BIRSS UK-2 hardener — corundum topping for industrial floors
Corundum hardening mix for heavy-duty concrete floors: compressive strength at least 65.0 MPa, abrasion 0.4 g/cm².

The black two-component solvent-free compound is applied over Kharts primer and the copper earthing tape and then covered with self-levelling Leytpol. The manufacturer calls the product a varnish, but by its role in the system it is a conductive priming layer that provides the electrical conductivity of the whole coating. Bond to concrete is at least 3.5 N/mm², service temperature −20…+60 °C, foot traffic is allowed after 3 days.
| Manufacturer | BIRSS — AO “Opytny Zavod Sukhikh Smesey”, Moscow |
|---|---|
| Type | floor primers |
| Use | antistatic/conductive, production halls |
| Base | two-component water-emulsifiable solvent-free epoxy compound (conductive layer) |
| Colour | black |
| Packaging | metal pails, kit (A+B) 16 kg |
| Application method | electrically conductive layer of the Leytpol system over Kharts primer and copper tape; 1–2 coats |
| Application temperature | not below +15 °C |
| Curing | drying to degree 3 — 6–8 h; further work after 24 h; foot traffic after 3 days; full cure after 7 days |
| Key properties | specific gravity 1.3 g/cm³; pot life at least 60 min; bond to concrete at least 3.5 N/mm²; service temperature −20…+60 °C (wet exposure up to +40 °C) |
| Consumption | 0.2–0.25 kg/m² for 1–2 coats |
| Shelf life | not more than 6 months in closed original packaging; protect from sunlight, heat and freezing |
| Standards | TU 2257-018-05668056-01 with amendments No. 1, No. 2; substrate to SP 71.13330.2017 (cl. 8.12) |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Corundum hardening mix for heavy-duty concrete floors: compressive strength at least 65.0 MPa, abrasion 0.4 g/cm².
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