OS-12-03 CERTA (TU 84-725-78) — organosilicate primer-enamel up to +300 °C
Organosilicate primer-enamel per TU 84-725-78 for steel structures, equipment, chimneys, tunnels and facades, from −60 °C to +300 °C.

Chimneys and flue ducts, furnaces, boilers, heat exchangers and process pipelines are the objects for which CERTA produces KO-868 primer-enamel. It is applied to steel and cement-sand substrates without primer; the black version is available for 700, 600 and 500 °C, the silver-grey for 650 and 600 °C. For atmospheric protection the range −60…+300 °C applies; painting is possible from −20 °C, and at sub-zero temperatures in thin coats.
| Manufacturer | CERTA — OOO “NPP “Spektr”, Novocheboksarsk |
|---|---|
| Type | heat-resistant coatings |
| Base | one-component silicone enamel (primer-enamel); organic solvents |
| Colour | black (up to 700, 600 and 500 °C), silver-grey (up to 650 and 600 °C), white, grey, green, bright red |
| Packaging | 25 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 −20 °C to +40 °C; relative humidity not more than 80 % |
| 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 |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Organosilicate primer-enamel per TU 84-725-78 for steel structures, equipment, chimneys, tunnels and facades, from −60 °C to +300 °C.
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Organosilicate primer-enamel for trusses, beams, trestles, power line towers, bridge structures and facades; categories C1–C3 per ISO 12944-2.
Organosilicate composition for the outer surface of heat and steam pipelines laid in ducts, tunnels and above ground, up to +300 °C.
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