PTS20
PTS20 universal clear PU sanding sealer
Two-pack clear polyurethane sanding sealer. Good clarity and build, fast to sanding (2 h) while staying fairly flexible with decent solids, and wets out micro-pores well (catalog). Fast drying, high solids, sands easily (official site). For open- and close-grained species, solid wood, veneer, plywood, MDF and HDF (dealer).
- clear interior furniture and joinery finishing
- sealer under PU lacquers (PTL20 in the schedule)
- raised-panel doors per the Technocolor schedule (2 sealer coats)
- over dye/stain (schedule: CTU + CFS1)
- solid wood, veneer, plywood, MDF, HDF
Mix calculator
Ask about PTS20
Answers are based on the PTS20 data and the products it mixes with.
Mixing matrix
- % by weight: 50 %official% by volume: 50 %official
always; either PC20 or PC25
Fixed ratio, mix on scales. On the catalog chart PC25 yellows slightly less than PC20, so prefer PC25 on pale timber.
- S50Thinner% by weight: 20–30 %official% by volume: 20–30 %official
always, to working viscosity; dealer allows 'another universal thinner'
S50 is the medium-evaporation thinner for PU and acrylic primers (catalog). Technocolor doesn't list S80 for PTS20; in heat (above ~25 °C) the owner's practice is to swap some S50 for slow S80 — workshop advice, not Technocolor's.
- PC25Hardener% by weight: 50 %schedule
'Raised-panel doors (PU)' schedule, steps 5 and 9
The schedule says 'C25'; this reads as PC25, the only '25' hardener listed for PTS20.
- S50Thinner% by weight: 20 %schedule
same door schedule: PTS20 100 / C25 50 / S50 20, 150 g/m²
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| Hardener | PC20 / PC25 | 50 %official | 50 %official | always; either PC20 or PC25Fixed ratio, mix on scales. On the catalog chart PC25 yellows slightly less than PC20, so prefer PC25 on pale timber. |
| Thinner | S50 | 20–30 %official | 20–30 %official | always, to working viscosity; dealer allows 'another universal thinner'S50 is the medium-evaporation thinner for PU and acrylic primers (catalog). Technocolor doesn't list S80 for PTS20; in heat (above ~25 °C) the owner's practice is to swap some S50 for slow S80 — workshop advice, not Technocolor's. |
| Hardener | PC25 | 50 %schedule | — | 'Raised-panel doors (PU)' schedule, steps 5 and 9The schedule says 'C25'; this reads as PC25, the only '25' hardener listed for PTS20. |
| Thinner | S50 | 20 %schedule | — | same door schedule: PTS20 100 / C25 50 / S50 20, 150 g/m² |
Percentages are per 100 parts of component A.
Characteristics
- Solids
- 45 %catalog
- Solids (qualitative)
- high solidsofficial
- Viscosity
- 65 ± 5 sdealer
- Pot life
- 3–4 hdealer
- Drying · Touch-dry
- 20dealer
- Drying · Sand or stack
- 2dealer
- Drying · Full cure
- 8dealer
- Drying · Conditions
- 20 °C
- Elasticity
- fairly high flexibilitycatalog
- Sandability
- sands easilyofficial
- Wetting
- wets micro-pores wellcatalog
- Hardener class
- aromatic hardeners PC20/PC25 (~27 % solids, fast/hard end of the chart, limited non-yellowing; PC25 slightly better than PC20)catalog
Colours
- PTS20 · clear
Application
HVLP
- Nozzle
- 1.6–1.8 (typ. 1.7) mmrecommended
- Pressure · air · Inlet pressure
- 2–2.5 barrecommended
- Pressure · air · Cap
- null–0.7 barrecommended
- Spray viscosity
- 18–24 s DIN4 / VZ-4recommended
- Consumption
- 150 g/m²official
- Wet film
- 130–160 µmrecommended
- Coats
- 2 (typ. 1)dealer
- Flash-off
- 10–15 minrecommended
- Recoat
- after sanding, no sooner than 2 h at 20 °C (or 1.5 h at 30–35 °C)dealer
- Sanding between coats
- P240 → P280 → P320 on flats, K120 pad on profilesschedule
- Technique · Gun distance
- 15–20 cmrecommended
- Technique · Overlap
- 50–75 %recommended
- Technique · Fan
- fully openrecommended
Officially spray only, 150 g/m² (dealer: 150 ml/m²). If all you have is a 1.4–1.5 mm gun, thin to the top of the range (30 % S50) and lay it in two light cross passes; you'll get a bit less build.
Conventional spray
- Nozzle
- 1.6–1.8 mmrecommended
- Pressure · air
- 3–4 barrecommended
- Spray viscosity
- 18–22 s DIN4 / VZ-4recommended
- Consumption
- 150 g/m²official
Conventional air spray transfers only up to ~40 % (methods page), so mix more than the area suggests.
Airmix (air-assisted airless)
- Nozzle
- 0.23–0.33 mmrecommended
- Pressure · fluid
- 40–80 barrecommended
- Pressure · air
- 1–2 barofficial
- Spray viscosity
- 20–30 s DIN4 / VZ-4recommended
- Consumption
- 150 g/m²official
Airmix is the quality/productivity compromise (methods page).
Airless
- Nozzle
- 0.28–0.33 mmrecommended
- Pressure · fluid
- 100–160 barrecommended
- Consumption
- 150 g/m²official
Per the methods page, airless is ideal for primers on large flat parts (doors, worktops, panels), with up to 90 % transfer.
Process and compatibility
- Substrate preparation
- Sand flats P150 → P180 → P220 and profiles with K60/K80 pads; stain first if needed (the schedule uses CTU + CFS1 + S12 at 80–100 g/m², 5 min at 20–25 °C) before priming.schedule
- Goes under
- PTL20
- Sanding
- P240 → P280 → P320 on flats, K120 on profiles, after 2 h at 20 °C or 1.5 h at 30–35 °Cschedule
- Temperature and humidity · Drying
- 30–35 °Cschedule
- Temperature and humidity · Application
- 18–25 °C, RH 50–70 %recommended
- Don'ts
- don't use the mix past 4 h (dealer: 3–4 h pot life)
- don't eyeball the hardener — exactly 50 % of base by weight
- don't sand before 2 h at 20 °C — the paper will clog
- don't topcoat without sanding
- don't lay more than ~150 g/m² per coat
Storage
Safety: Solvent-borne 2K PU with an aromatic isocyanate hardener: spray in an extracted booth, wear a carbon respirator (A2/P2 or air-fed), nitrile gloves and eye protection; keep away from ignition sources. (General 2K PU rules; no SDS found.)
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 page: properties, spray 150 g/m², PC20/PC25 50/50 %, S50 20–30 % wt/vol
- dealer: viscosity 65±5 s VZ-4, pot life 3–4 h, touch 20 min, sand 2 h, full 8 h, 1 coat, substrates
- official schedule: PTS20 100 / C25 50 / S50 20, 150 g/m², 1.5 h at 30–35 °C, P240–P320 / K120, 2 coats, PTL20 topcoat
- methods page: conventional/airless/airmix/electrostatic descriptions
Not covered by the sources
- density
- gloss of the dried film
- dust-free time (only touch-dry 20 min is published)
- hardness
- lightfastness / yellowing figure for the cured film
- chemical resistance
- shelf life and storage temperature
- real ТДС / SDS PDF not found (web search budget exhausted; no PDF on dealer page)
- S80 compatibility not stated by Technocolor
- no official nozzle/pressure data — all spray settings derived