BIRSS RSM Zashchitny Sloy — fine-grained R2 mix for non-structural repair
Rapid-hardening polymer-cement mix for small defects of exposed concrete, steps, stairs and fine finishing; aggregate size 0.315 mm.

BIRSS 59 S1 M600 Moroz, a non-shrink plastic mix for structural repair of horizontal concrete and reinforced concrete structures, is placed at temperatures from −15 to +5 °C. It is used to restore road pavements and runways, bridges, car parks, industrial floors and equipment foundations. If the mortar hardens at −15 °C, at 28 days it reaches 30 MPa in compression, at +20 °C 60 MPa; class R4, water impermeability W14, frost resistance F2 400.
| Manufacturer | BIRSS — AO Opytny Zavod Sukhikh Smesey (Experimental Dry Mix Plant), Moscow |
|---|---|
| Type | flowable repair mortars |
| Use | roads and airfields, bridges and overpasses, floors, equipment foundations, hydraulic structures and dams |
| Base | BIRSS 59 S1 M600 Moroz rapid-hardening dry repair mix is a material based on special cements, high-quality natural fillers and chemical admixtures. When mixed with water it forms a non-shrink, plastic, non-segregating mortar with high water retention and excellent… |
| Colour | light grey |
| Packaging | bags 25 / 40 kg |
| Application method | For structural repair of horizontal concrete and reinforced concrete structures: repair of road pavements and airfield runways, bridge spans and bridge decks, concrete pavements of parking areas in all climatic zones; repair of industrial floors, walls and equipment foundations indoors and in open areas subject to heavy mechanical loads and aggressive media (mineral oils, lubricants, etc.); repair of concrete and reinforced… |
| Application temperature | −15…+5 °C |
| Key properties | maximum aggregate size, mm: 5.0; workability grade: Rk4/ 18-22; setting time: initial not earlier than 30 min, final not later than 60 min; workability retention, min: 30; bond strength to substrate, MPa: 2.5; compressive strength, MPa, not less than; 1 day (at t=20 °C/ at t=-15 °C); 3 days (at t=20 °C/ at t=-15 °C); 7 days (at t=20 °C/ at t=-15 °C); 28 days (at t=20 °C/ at t=-15 °C) 20/5 30/10 45/15 60/30; flexural strength, MPa, not less than; 28 days (at t=20 °C/ at t=-15 °C) 8/5; modulus of elasticity, MPa: 25,000; water impermeability: W14; frost resistance: F2 400; frost resistance of the contact zone: 100; sulphate resistance coefficient: 0.9; service temperature, °C: from -50 to +70 |
| Standards | class R4 to GOST R 56378; STO 05668056-004-2012 |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Rapid-hardening polymer-cement mix for small defects of exposed concrete, steps, stairs and fine finishing; aggregate size 0.315 mm.
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