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HardenersHardener

PC10

PC10 Hardener for PU coatings

Aromatic isocyanate hardener, fairly reactive and fast-drying. Used as the second component in polyurethane primers/sealers and matt PU lacquers.

  • Second component for PU primers/sealers and matt PU lacquers
  • PTL80 lacquer/sealer (all gloss levels) — 50 %
  • PTS10 economy clear PU sealer — 50 %
  • PPS10 economy white PU primer — 40 %
  • PTL10 (2022 catalog) — 50 %

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Answers are based on the PC10 data and the products it mixes with.

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Mixing matrix

  • PTL80 Mbase_component
    % by weight: 50 %official% by volume: 50 %official

    Main use: the standard hardener for PTL80 self-sealing lacquer.

    Fixed ratio. Thin with S50 20–30 % by weight / 25–35 % by volume, added after the hardener.

  • PTL80 M / PTL80 SM / PTL80 Gbase_component
    % by weight: 50 %catalog

    PTL80 gloss levels per the 2022 catalog (M 20, SM 30, G 90). For SM the dealer gives the same 50 % by weight and by volume (listed as 'PC80').

  • PTS10base_component
    % by weight: 50 %catalog

    Economy clear PU sealer (alternative: PC20 at 40 %).

  • PPS10base_component
    % by weight: 40 %catalog

    Economy white PU primer (alternative: PC20 at 30 %).

  • PTL10base_component
    % by weight: 50 %catalog

    Discontinued PTL10 lacquer/sealer (2022 catalog).

  • S50Thinner
    % by weight: 10–30 %source

    Thinner for every PC10 system: 20–30 % for lacquers and clear sealers, 10–20 % for white PPS10.

    Never thin the hardener on its own or use extra hardener in place of thinner. PTL80 by volume: 25–35 % (official) / 20–30 % (dealer).

  • PC20substitute_hardener
    % by weight: 30–40 %catalog

    2025-catalog substitute: PTL80/PTS10 — PC20 40 % instead of PC10 50 %; PPS10 — PC20 30 % instead of PC10 40 %. On the catalog scale PC20 yellows slightly less; both sit on the fast/hard side of the chart.

    PC20 is probably dosed lower because it carries more solids (≈27 % vs ≈23 % read off the catalog chart) — an inference, not a quoted statement.

Percentages are per 100 parts of component A.

Characteristics

Solids
24 ± 1 %dealer
Solids, chart %
23 % (≈, read off chart)catalog
Chemistry
aromatic polyisocyanatedealer
Reactivity
fairly high reactivity and drying speeddealer
Speed vs elasticity
left of the fast/hard → slow/flexible axis: fast, hard filmcatalog
Yellowing resistance
low: second-worst on the catalog's yellowing scale (only PC72 is worse)catalog
Lightfastness
poor — yellows with age; not for topcoats over white or pale timberrecommended
Pot life
4 hdealer
Drying · Conditions
20 °C, in PTL80 M at 50 %
Drying · Touch-dry
15 mindealer
Drying · Full cure
6 hdealer
Viscosity
low, free-flowing solutionrecommended
To sanding (PTS10)
2 hcatalog

Application

HVLP

Nozzle
1.4–2 mmrecommended
Pressure · air
1.8–2.2 bar at gun inlet (HVLP, trigger pulled)recommended
Spray viscosity
18–22 s DIN4 at 20 °Crecommended
Consumption
120–150 g/m²catalog

PC10 is never applied on its own — only mixed into a component A. Spray settings belong to the host product (PTL80, PTS10, PPS10).

Airmix (air-assisted airless)

Nozzle
0.23–0.33 mm (tip .009–.013 in)recommended
Pressure · fluid
null–20 barofficial
Pressure · air
1–2 barofficial

For production work with PTL80/PPS10. Mind the 4 h pot life — flush the pump before the mix thickens.

Process and compatibility

Mixing
Weigh component A, add PC10 exactly per the host product's ratio, stir, then add S50; let it stand 5–10 min and strain.recommended
Temperature and humidity
15–25 °C, RH < 70 %recommended
Don'ts
  • Don't eyeball the ratio — excess hardener gives a brittle film, too little leaves it soft and tacky
  • Don't use for topcoats over white enamels or pale timber — it yellows
  • Don't blend it with other hardeners in the same pot
  • Don't leave the tin open — air moisture ruins it (goes cloudy, thickens, gels)
  • Don't spray mix that has thickened past its pot life

Storage

Packaging
2,5 л,25 лdealer
Storage temperature
+5…+25 °C, в плотно закрытой заводской таре, вдали от влагиrecommended

Safety: Contains isocyanates and organic solvents: flammable, harmful if inhaled, may cause respiratory and skin sensitisation. Spray only in a booth with an A2P2 organic-vapour respirator or air-fed mask, nitrile gloves and goggles. Keep away from ignition sources.

Mixed into

PC80 / PPS10 / PTL10 SM / PTL80 G / PTL80 M / PTL80 SG / PTL80 SM / PTL80 UM / PTS10

Sources

Value tags: “official”, “dealer”, “catalog”, “schedule” are Technocolor data; “workshop” is from our own datasheets; “recommended” is our engineering estimate (hover to see the reasoning).

Not covered by the sources
  • No official t-color.ru page, no TDS/SDS found (web search budget exhausted; dealer pages give only solids)
  • Own density, viscosity, NCO content and flash point of PC10 not published
  • Shelf life of PC10 not published
  • Pot life / drying published only for the PTL80 M mix — none for PTS10 or PPS10 with PC10
  • % by volume published only for PTL80 M (50 %); PTS10/PPS10/PTL10 ratios are by weight from catalogs only
  • Not referenced by any official finishing schedule (information/technology pages)
  • Exact hazard classification (TDI- vs MDI-based adduct) unknown
  • Dealer code 'PC80' on PTL80 SM unexplained — probably a typo for PC10
  • PTL80 S50 % by volume: official 25–35 % vs dealer 20–30 % — unresolved
  • PTL80 UM: dealer page has no mixing table