KO-815 Elcon — heat-resistant silicone varnish up to +300 °C
Colourless silicone varnish for metal and concrete up to +300 °C, dries at 150 °C; serves as the base of KO-813 silver enamel.

Elcon produces KO-813 in two versions. The two-component version per GOST 11066-74 is mixed from KO-815 varnish and PAP-2 aluminium powder in a ratio of 94 : 6; it dries on heating and is usable for 8 h after mixing; the one-component version per TU 2312-010-49222195-2012 dries to degree 3 at 20 °C. Both versions give a silver coating for steel structures and equipment that works from −60 °C to +500 °C without primer.
| Manufacturer | Elcon — OOO “Elcon”, Novocheboksarsk |
|---|---|
| Type | heat-resistant coatings |
| Use | steel structures, equipment |
| Base | two versions: two-component per GOST 11066-74 (KO-815 varnish + PAP-2 aluminium powder, 94 : 6) and one-component per TU (silicone resin with a solution of pentaphthalic resin) |
| Colour | silver |
| Packaging | two-component: KO-815 varnish 20 kg + PAP-2 powder 1.5 kg; one-component: 25 kg |
| Application method | air spray (working viscosity 12–17 s); 2–3 cross coats with drying to “tack-free” 0.5–2 h; preparation St 3 or Sa 2–Sa 2.5, degreasing; use the two-component enamel within 8 h after mixing |
| Application temperature | from −30 °C to +40 °C (air and substrate); relative humidity not more than 80 %; surface at least 3 °C above the dew point |
| Drying | two-component: to degree 3 not more than 2 h at (150±5) °C; one-component: to degree 3 not more than 2 h at (20±2) °C; final drying at least 24 h; full cure on heating; installation — not earlier than 3 days |
| Key properties | Heat resistance: from −60 °C to +500 °C, Two-component: impact strength 35 cm, after 3 h at 450–500 °C — 15 cm; flexibility not more than 3 mm; water and petrol — 24 h, One-component: non-volatile matter 40±5 %; impact at least 40 cm; adhesion not more than 1 point; resistance at 500 °C at least 3 h; water, petrol, oil — 48 h |
| Compatible materials | no priming required |
| Shelf life | one-component — 24 months; KO-815 varnish for the two-component version — 36 months; storage from −30 °C to +40 °C |
| Standards | GOST 11066-74 (two-component); TU 2312-010-49222195-2012 (one-component) |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Colourless silicone varnish for metal and concrete up to +300 °C, dries at 150 °C; serves as the base of KO-813 silver enamel.
Organosilicate composition for the outer surface of heating network pipelines in tunnels, collectors and crawl spaces, up to +150 or +300 °C.
One-component cold galvanising compound for bridges, power line towers, oil and gas and port structures; applied in frost down to −20 °C.
Silicone enamel for pipelines, chimneys, heating pipes and waste incineration furnaces heated up to +700 °C.
Silicone enamel for equipment, oil and gas pipelines and chimneys under high humidity and heating up to +700 °C.
Silicone enamel for low-carbon steel parts over phosphated and non-phosphated surfaces, heating up to +700 °C.