KO-85 CERTA — heat-resistant varnish for metal, concrete and brick up to +250 °C
Colourless silicone varnish for metal, concrete and brick heated up to +250 °C, heating pipelines and heat exchangers.

For heated steel surfaces — furnaces, boilers, heat exchangers, industrial equipment and hot water supply pipelines — CERTA produces KO-811 primer-enamel to TU 2312-027-49248846-2015. The coating works from −60 °C to +700 °C depending on colour, is resistant to mineral oil, petroleum products and salts, and is applied without primer by spraying, brush or roller. Besides 25 kg containers, a 0.8 kg pack is available.
| Manufacturer | CERTA — OOO “NPP “Spektr”, Novocheboksarsk |
|---|---|
| Type | heat-resistant coatings |
| Base | one-component silicone enamel (primer-enamel); organic solvents |
| Colour | black, white, green, silver-grey, grey, bright red |
| Packaging | 25 kg; 0.8 kg |
| Application method | air spray (working viscosity 20–25 s), airless spray (35–50 s), brush or roller (30–50 s); stripe coat on welds and edges; preparation Sa 2½ per ISO 8501-1 (St 3 permitted); solvent CERTACOR R, toluene, o-xylene (not more than 10 %; white spirit, solvent naphtha and petrol are not permitted) |
| Application temperature | from −30 °C to +40 °C; relative humidity not more than 80 %; surface 3 °C above the dew point; no precipitation, wind not more than 10 m/s |
| Drying | intercoat drying 90 min at −30 °C, 60 min at 0 °C, 30 min at +20 °C; full properties in 72 h at +20 °C; for service above 100 °C — hot curing at commissioning: 1 h in air, heating (4±0.5) °C/min, at least 3 h at service temperature; for mineral oil and petrol media without heating — 30 min at 250–400 °C; installation — not earlier than 72 h |
| Key properties | Service temperature: from −60 °C to +700 °C depending on colour, Resistance to mineral oil, petroleum products, salts, No priming required |
| Compatible materials | applied without primer; any primer used must not impair the properties of the system |
| Shelf life | 12 months from the date of manufacture; storage from −30 °C to +40 °C |
| Standards | TU 2312-027-49248846-2015 |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
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