C26
PU hardener C26 (schedule label; probably PC25 — universal hardener for PU coatings)
Part B (isocyanate hardener) for the 2K clear PU sealer PTS60 in the official beech-veneer worktop schedule. No product page, data sheet or dealer listing exists under the code C26. The 50 % ratio matches the official PTS60 page ('PC25 / PC20'), and the schedules drop the 'P' prefix (C25 = PC25), so this is almost certainly PC25 — an aromatic, fast hardener giving a hard, easy-sanding film. In practice: where you see C26, use PC25.
- Hardener for PTS60 sealer (100 : 50 by weight) in the 'Beech-veneered worktops (PU)' schedule, both sealer coats
Ask about C26
Answers are based on the C26 data and the products it mixes with.
Mixing matrix
- PTS60host% by weight: 50 %schedule
Sealing beech-veneer worktops, coats 1 and 2: PTS60 100 / C26 50 / S50 20, 150 g/m², dry 1.5 h at 30–35 °C, sand P240–P320.
Official PTS60 page for PC25/PC20: 50 % by weight / 60 % by volume; thinner S50 20–25 % by weight / 30 % by volume. Note: the dealer's PTS60 table shows PC25 at 60 % by weight / 60 % by volume — conflicts with the official page and the schedule (50 %); 50 % by weight (official + schedule) is used. No volume figure for C26 — use 60 % (as PC25).
- PTS60host% by volume: 60 %recommended
When mixing by measuring cup rather than scales.
- PC25substitute% by weight: 50 %official% by volume: 60 %official
Primary replacement for C26 — the current product, sold by the dealer.
Dealer (t-colormarket PTS60) lists 60 % by weight / 60 % by volume — conflicts with official 50/60.
- PC20substitute% by weight: 50 %official% by volume: 60 %official
Alternative per the official PTS60 page: slightly slower and more elastic than PC25.
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| host | PTS60 | 50 %schedule | — | Sealing beech-veneer worktops, coats 1 and 2: PTS60 100 / C26 50 / S50 20, 150 g/m², dry 1.5 h at 30–35 °C, sand P240–P320.Official PTS60 page for PC25/PC20: 50 % by weight / 60 % by volume; thinner S50 20–25 % by weight / 30 % by volume. Note: the dealer's PTS60 table shows PC25 at 60 % by weight / 60 % by volume — conflicts with the official page and the schedule (50 %); 50 % by weight (official + schedule) is used. No volume figure for C26 — use 60 % (as PC25). |
| host | PTS60 | — | 60 %recommended | When mixing by measuring cup rather than scales. |
| substitute | PC25 | 50 %official | 60 %official | Primary replacement for C26 — the current product, sold by the dealer.Dealer (t-colormarket PTS60) lists 60 % by weight / 60 % by volume — conflicts with official 50/60. |
| substitute | PC20 | 50 %official | 60 %official | Alternative per the official PTS60 page: slightly slower and more elastic than PC25. |
Percentages are per 100 parts of component A.
Characteristics
- Solids
- 28 ± 1 %recommended
- Reactivity
- high (if PC25 — extreme 'fast/hard' end of the catalog chart)recommended
- Lightfastness
- aromatic — yellows in light; acceptable under a lacquer on beech, not the best choice for pale/whitened tones (on the yellowing scale PC25 beats PC20 but is behind PC60)recommended
- Pot life
- 3–4 hdealer
- Drying · Touch-dry
- 20 mindealer
- Drying · Sand or stack
- 1.5 hschedule
- Drying · Full cure
- 8 hdealer
- Drying · Conditions
- values belong to the PTS60 mix; 20 °C dealer / 30–35 °C schedule
- Drying · Sanding at 20 °C (h)
- 4 hdealer
- Hardness
- with PTS60 — high hardness, sands wellofficial
Application
Conventional spray
- Nozzle · HVLP
- 1.7–1.8 mm
- Nozzle · Why ru
- Как в записи PTS60: прозрачный ПУ изолирующий грунт с 50 % сухого остатка, основа 75 с CF-4, ~22–28 с DIN4 после 50 % отвердителя + 20 % S50 — гуще прозрачного акрила (1,5 мм), но жиже белого ПУ грунта с высоким сухим остатком (1,8–2,0 мм).
- Pressure · air
- 2–2.5 barrecommended
- Consumption
- 150 g/m²schedule
- Coats
- 2schedule
- Flash-off
- 5–10 minrecommended
- Sanding between coats
- P240, P280, P320 (flat); К120 sponges (edges)schedule
Add hardener to the base, stir, let stand 5–10 min, then thin with S50 to spray viscosity. Close the hardener can immediately — isocyanate reacts with air moisture.
Process and compatibility
- Goes over
- CTH
- Goes under
- PTL61
- Used with
- PTS60, S50
- Temperature and humidity
- dry at 30–35 °C, 1.5 hschedule
- Don'ts
- Don't hunt for 'C26' to buy — use PC25 (or PC20) at the same ratio
- Don't use hardener that has thickened or gone cloudy (moisture-reacted)
- Don't exceed the 3–4 h pot life of the mix
Storage
- Storage temperature
- +5…+25 °C, плотно закрытая тара, без влагиrecommended
Safety: Contains isocyanates and flammable solvents: spray booth, respirator (A2P2/A2P3 or air-fed), nitrile gloves, goggles. Keep away from ignition sources.
Used in finishing systems
Mixed into
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).
- Only mention of C26: PTS60 100 % / C26 50 % / S50 20 %, 150 g/m², 30–35 °C 1.5 h (steps 5 and 9)
- Official PTS60: hardener PC25 / PC20, 50 % wt / 60 % vol; S50 20–25 % wt / 30 % vol
- Dealer PTS60: solids A 50±1 %, viscosity A 75±5 s CF-4, pot life 3–4 h, touch 20 min, sand 4 h, full 8 h (20 °C); mixing table PC25 60 wt / 60 vol (conflicts with official 50/60), S50 20–25 wt / 30 vol
- Dealer search 'C26' — no product results
- Dealer hardener list (2 pages) — slugs c10_/c20/c25/c40/c41/c60/c72/c90/c200/pc21/lnb*; no c26
- PC25 (URL slug c25) — probable current equivalent
Not covered by the sources
- No official page, dealer listing, catalog entry or TDS exists for code C26 — identity with PC25 is derived, not confirmed
- Own solids, density, NCO content, viscosity of C26 unknown (PC25 values used provisionally)
- Weight vs volume basis of the schedule's 50 % not stated (assumed weight)
- Shelf life and packaging unknown
- Official schedule page header reads 'Открытопористая отделка кухонных фасадов из дуба (Акр.)' while URL/index title is the beech-worktop PU schedule — site template glitch; content (PTS60/C26/PTL61/C61) is PU
- Dealer PTS60 mixing table (PC25 60 wt %) contradicts official PTS60 page and schedule (50 wt %); unresolved at source
- No TDS/SDS found for C26 (none expected — code not sold)