Forpol-Nafta — polyurethane mastic for external insulation of underground gas pipelines
Spray-applied polyurea-urethane coating with 100 % solids for pipes and fittings of underground gas pipelines, service life at least 30 years.

A UV-resistant finish coat for anticorrosion systems: a two-component acrylic-urethane enamel tinted to the RAL catalogue. Per ISO 12944 it is designed for categories C1–C5M and CX, as well as Im1–Im3, and is used on bridge spans, corrugated pipes, sheet piling, power line towers, tanks, above-ground pipelines and mining equipment. The enamel is applied over the primers “Epokron”, “Protekron” and “Primakron”, on concrete over the varnish “Eteral” or the “KronFlex” system; work is permitted at temperatures from −10 to +40 °C.
| Manufacturer | Kronos SPb — AO “KRONOS SPb”, Saint Petersburg |
|---|---|
| Type | polyurethane enamels |
| Base | Two-component acrylic-urethane enamel (base + hardener) |
| Colour | to the RAL catalogue |
| Application method | brush, roller, spatula; air spray (3–4 bar, nozzle 1.8–2.2); airless spray (at least 180 bar, nozzle 0.009–0.017″); thinning max. 10 % (“Kronos-Deko” thinner, xylene, solvent) |
| Application temperature | from −10 to +40 °C; relative humidity max. 85 %; surface at least 3 °C above the dew point; keep the components for 24 h at a temperature not below +10 °C |
| Drying | tack-free (degree 3) — less than 4 h at 20 °C; recoat interval 0.5–1.5 h; pot life at least 3 h at 20 °C |
| Key properties | Corrosivity categories: C1–C5M, CX, Im1 to Im3 per ISO 12944, Non-volatile matter by weight: more than 68 %, Density: 1.26 g/cm³, Impact strength of the coating (U-1): more than 50 cm, Tensile strength: more than 6 mm, Taber abrasion (CS10, 1 kg, 1,000 cycles): less than 75 mg, TML hardness: more than 0.5 conventional units |
| Compatible materials | primers “Epokron”, “Protekron”, “Primakron”; on concrete — over the varnish “Eteral” or the “KronFlex” system; on top — varnish “Kronos-Deko” |
| Shelf life | 24 months from the date of manufacture; storage and transport from −40 to +40 °C |
| Standards | TU 2312-159-20504464-2019; STO 01393674-007-2019 |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Spray-applied polyurea-urethane coating with 100 % solids for pipes and fittings of underground gas pipelines, service life at least 30 years.
Polyurea-urethane coating for gas pipelines, CS and UGS: service from −60 to +80 °C, briefly up to +230 °C.
One-component 3-in-1 primer-enamel for bridges, supports, wagons and machinery, applied over rust at temperatures from 0 °C.
Sacrificial primer with zinc powder for bridges, tanks and pipelines, temperature resistance from −60 to +140 °C.
Silver paint for steel structures in temperate and cold climates, applied without a primer on ferrous metals and aluminium alloys.
Hand-applied repair mastic for Forpol-Nafta coatings on gas pipeline pipes and fittings, pot life of the mix more than 45 min.