PTL50 SM
PTL50 SM Thixotropic 2K PU clear lacquer (satin, 30 gloss)
Two-pack clear polyurethane lacquer with thixotropic body for vertical and carved/turned work. Hangs on verticals without runs or sags yet still flows out to a clean finish. Fast drying, pleasant to the touch. Cured 2:1 with an aromatic PU hardener (50 % by weight). Matted grade — stir the matting agent up from the bottom before use.
- chairs and armchairs
- carved, turned and profiled furniture parts
- vertical work (legs, frames, routed doors)
- furniture in any wood species (beech, oak, etc.)
Mix calculator
Ask about PTL50 SM
Answers are based on the PTL50 SM data and the products it mixes with.
Mixing matrix
- PC20Hardener% by weight: 50 %official% by volume: 50 %official
default — fixed 2:1 ratio
PC20 is an aromatic, fairly reactive, fast-drying hardener (28 ± 1 % solids). Weigh it, don't eyeball it.
- PC25Hardener% by weight: 50 %dealer% by volume: 50 %dealer
dealer-listed alternative to PC20
PC25 'universal' — aromatic, 28 ± 1 % solids; slightly less yellowing than PC20 on the catalogue scale.
- % by weight: 25–30 %official% by volume: 25–30 %official
S50 by default in a normal shop; S70/S80 are slow — hot shop (>25 °C), big parts, dead-matt or gloss grades
S50: medium evaporation, good solvency. S70/S80: slow — more sag risk on verticals and more dust pick-up.
- S50Thinner% by weight: 20–30 %catalog
2025-26 catalogue, whole PTL50 line
Catalogue allows down to 20 % — for maximum hold on verticals.
- S100Additive% by weight: 5–10 %dealer
hot weather — small amount on top of the main thinner to improve flow-out
S100 is a very slow retarder; per its official page it prevents solvent bubbles in summer. Lengthens drying.
- % by weight: 50 %schedule
official schedule 'Beech chairs (PU)', step 10 — topcoat at 150 g/m², dry 2 h at 30–35 °C
'C50' in the schedule isn't in the current range; the dealer's URLs use c20/c25 for PC20/PC25, so C50 looks like a legacy name of a PC-series PU hardener. In practice use PC20/PC25 at 50 %.
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| Hardener | PC20 | 50 %official | 50 %official | default — fixed 2:1 ratioPC20 is an aromatic, fairly reactive, fast-drying hardener (28 ± 1 % solids). Weigh it, don't eyeball it. |
| Hardener | PC25 | 50 %dealer | 50 %dealer | dealer-listed alternative to PC20PC25 'universal' — aromatic, 28 ± 1 % solids; slightly less yellowing than PC20 on the catalogue scale. |
| Thinner | S50 / S70 / S80 | 25–30 %official | 25–30 %official | S50 by default in a normal shop; S70/S80 are slow — hot shop (>25 °C), big parts, dead-matt or gloss gradesS50: medium evaporation, good solvency. S70/S80: slow — more sag risk on verticals and more dust pick-up. |
| Thinner | S50 | 20–30 %catalog | — | 2025-26 catalogue, whole PTL50 lineCatalogue allows down to 20 % — for maximum hold on verticals. |
| Additive | S100 | 5–10 %dealer | — | hot weather — small amount on top of the main thinner to improve flow-outS100 is a very slow retarder; per its official page it prevents solvent bubbles in summer. Lengthens drying. |
| hardener+thinner | C50 / S80 | 50 %schedule | — | official schedule 'Beech chairs (PU)', step 10 — topcoat at 150 g/m², dry 2 h at 30–35 °C'C50' in the schedule isn't in the current range; the dealer's URLs use c20/c25 for PC20/PC25, so C50 looks like a legacy name of a PC-series PU hardener. In practice use PC20/PC25 at 50 %. |
Percentages are per 100 parts of component A.
Characteristics
- Solids
- 44±1 % part Adealer
- Mixed solids %
- 32–34 % (ready-to-spray)recommended
- Viscosity
- 80±5 sdealer
- Density
- ≈0.95–1.0 kg/l (part A)recommended
- Gloss
- 30 gloss (60°)official
- Pot life
- 4dealer
- Drying · Dust-free
- 10–20 minrecommended
- Drying · Touch-dry
- 30dealer
- Drying · Sand or stack
- 4–6 hrecommended
- Drying · Stack after forced drying
- 2 h at 30–35 °Cschedule
- Drying · Full cure
- 8dealer
- Drying · Conditions
- 20 °C
- Lightfastness
- Aromatic hardener: PC20 and PC25 are «ароматические» and sit at the low (yellowing) end of the catalogue's yellowing-resistance scale: PC72 → PC10 → PC20 → PC90 → PC25 → … → AC40catalog
- Thixotropy
- yesofficial
Application
HVLP
- Nozzle
- 1.5–1.7 (typ. 1.6) mmrecommended
- Pressure · air
- 2–2.2 barrecommended
- Spray viscosity
- 18–24 s DIN4 / VZ-4 at 20 °Crecommended
- Consumption
- 120–150 g/m²official
- Wet film
- 120–160 µmrecommended
- Coats
- 1 coatschedule
- Flash-off
- 10–15 minrecommended
- Recoat
- 4–6 hrecommended
- Sanding between coats
- PTS50 primer sanded K120 (schedule) / P280–P320 (dealer instruction) before PTL50schedule
- Gun setup
- fan fully open, distance 15–20 cm, 50–75 % overlap, 10–13 CFMworkshop
Thixotropic: stir before measuring and before filling the cup. On chairs do inside corners and end grain first, then the faces, in one full wet coat.
Conventional spray
- Nozzle
- 1.5–1.8 mmrecommended
- Pressure · air
- 3–4 barrecommended
- Pressure · fluid
- 0.8–1.5 barrecommended
- Spray viscosity
- 18–24 s DIN4recommended
- Consumption
- 120–150 g/m²official
More overspray, finer atomisation.
Electrostatic
- Listed
- Электростатическое распыление 120–150 г/м²official
- Nozzle
- 1.2–1.5 mm (air-spray electrostatic) / 09–11 thou (0.23–0.28 mm) airmix-electrostatic tiprecommended
- Pressure · air
- 2–3.5 barrecommended
- Pressure · fluid
- 40–80 barrecommended
- Spray viscosity
- 18–24 s DIN4recommended
- Consumption
- 120–150 g/m²official
Ground the part. Check mixed-paint resistivity with the gun maker's meter; slow thinners (S70/S80) can push it out of the window — switch to S50 if the wrap drops off.
Airmix (air-assisted airless)
- Tip
- 09–11 thou (0.23–0.28 mm), 20–40° fan for chair parts, 40–60° for panelsrecommended
- Nozzle
- 0.23–0.28 mmrecommended
- Pressure · fluid
- 40–80 barrecommended
- Pressure · air
- 1–2 barofficial
- Spray viscosity
- 22–30 s DIN4recommended
- Consumption
- 120–150 g/m²official
Not listed by Technocolor for PTL50, but suits production runs.
Airless
Not for a topcoat — the official methods page puts airless on primers for big flat panels.
Process and compatibility
- Substrate preparation
- Sand P60, P80 → CTH stain 80–100 g/m² (method not stated in the schedule; dealer: dipping) → 2 coats PTS50 at 150 g/m², sanding P120 between → PTL50.schedule
- Goes over
- PTS50 / CTH (stain)
- Sanding
- PTS50 primer P280–P320 (dealer; K120 in the chair schedule). Don't sand or polish the PTL50 topcoat; if a 2nd coat is needed, P320–P400 between.recommended
- Temperature and humidity
- 18–25 °C, RH 50–70 %. Forced dry 30–35 °C (schedule, 2 h). Above 25 °C swap S50 for S70/S80 and/or add 5–10 % S100.recommended
- Don'ts
- Don't use it on large flat horizontals — thixotropic lacquer levels poorly: open pores and orange peel (official characteristics page)
- Don't use mixed lacquer after 4 h
- Don't change the 2:1 hardener ratio — weigh it
- Avoid over white/pale work where yellowing matters (aromatic hardener)
- Don't load more than 150 g/m² per coat
Storage
- Packaging
- 1 л,5 л,25 лdealer
Safety: Solvents + aromatic isocyanate hardener: spray in a ventilated booth, A2 respirator or air-fed mask, 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).
- official card: properties, spray + electrostatic 120–150 g/m², PC20 50/50, S50/S70/S80 25–30 wt/vol
- dealer: description, uses, mix (PC20/PC25 50/50; S80/S50/S70 25–30), S100 5–10 % hot-weather note, gloss 30±3, solids A 44±1 %, viscosity 80±5 s VZ-4, pot life 4 h, touch 30 min, full 8 h, packs
- official schedule Beech chairs (PU): PTL50 100 : C50 50 : S80 30, 150 g/m², dry 2 h at 30–35 °C over 2× PTS50
- application methods (electrostatic for chairs; airmix 1–2 bar air; airless for primers)
- characteristics vocabulary: pot life, drying stages, thixotropy caveat, gloss geometry
- PC20 dealer: aromatic, reactive, fast; 28 ± 1 % solids
- PC25 dealer: aromatic universal; 28 ± 1 % solids
- S100 dealer: very slow retarder
- S100 official: prevents bubbles in summer
- S50 official: medium drying
- S70 official: slow
- S80 official: SG 0.84 ± 0.01, slow
Not covered by the sources
- density (derived only)
- dust-free time (derived only)
- stack/sand time at 20 °C (derived; only forced 2 h @30–35 °C sourced)
- hardness
- elasticity
- chemical resistance
- shelf life
- storage temperature
- nozzle/pressure (all derived)
- thinner % basis not stated
- no TDS/SDS PDF found
- identity of 'C50' hardener in official schedule