LBA527
LBA527 Wetting (grain-enhancing) clear polyurethane sealer
Two-pack clear polyurethane sealer by Milesi. 'Wetting' means it soaks in and brings up the grain — it warms and enhances the figure while staying very clear. Sands easily and dries fast: touch dry in 45 min, sandable after 4 h. Part A solids 47 ± 1 %. Mixed 2:1 with LNB21 hardener (50 %) and cut 10–30 % with LZC1051.
- case (carcass) furniture
- furniture doors and fronts
- other wooden items
- clear finishing under PU topcoats where you want the grain brought up
Mix calculator
Ask about LBA527
Answers are based on the LBA527 data and the products it mixes with.
Mixing matrix
- LNB21Hardener% by weight: 50 %dealer% by volume: 50 %dealer
The only hardener the dealer lists.
2:1 (sealer : hardener) by weight and by volume. LNB21 is Milesi's isocyanate hardener for PU primers and matt lacquers; pot life of the mix 3 h at 20 °C.
- LZC1051Thinner% by weight: 10–30 %dealer% by volume: 10–30 %dealer
Always; 10–15 % for maximum build, 25–30 % for small tips / airmix and hot weather.
LZC1051 is Milesi's PU thinner. Add hardener first, then thin and check viscosity.
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| Hardener | LNB21 | 50 %dealer | 50 %dealer | The only hardener the dealer lists.2:1 (sealer : hardener) by weight and by volume. LNB21 is Milesi's isocyanate hardener for PU primers and matt lacquers; pot life of the mix 3 h at 20 °C. |
| Thinner | LZC1051 | 10–30 %dealer | 10–30 %dealer | Always; 10–15 % for maximum build, 25–30 % for small tips / airmix and hot weather.LZC1051 is Milesi's PU thinner. Add hardener first, then thin and check viscosity. |
Percentages are per 100 parts of component A.
Characteristics
- Solids
- 47 ± 1 %dealer
- Mixed solids %
- 33–37 %recommended
- Viscosity
- 37 sdealer
- Viscosity, DIN 4 equiv.
- ≈ 50–65 s DIN4 (≈ 220–270 mm²/s) for part Arecommended
- Pot life
- 3 hdealer
- Drying · Touch-dry
- 45 mindealer
- Drying · Sand or stack
- 4 hdealer
- Drying · Full cure
- 24 hdealer
- Drying · Dust-free
- 15–25 minrecommended
- Drying · Conditions
- 20 °C
- Thixotropy
- norecommended
Application
HVLP
- Nozzle
- 1.6–1.8 (typ. 1.7) mmrecommended
- Pressure · air · Inlet pressure
- 2–2.5 barrecommended
- Pressure · air · Cap
- ≤ 0.7 barrecommended
- Spray viscosity
- 18–24 s DIN4 (target 20–22 s)recommended
- Consumption
- 150 g/m²dealer
- Wet film
- 140–160 µmrecommended
- Coats
- 1–2 coatsrecommended
- Flash-off
- 15–30 minrecommended
- Recoat · Sand and topcoat after
- 4 hdealer
- Recoat · Max without sanding
- same day (within ~8 h)recommended
- Sanding between coats
- 320–400 grit Precommended
- Gun distance
- 15–20 cmrecommended
1.6–1.8 mm tip, 2.0–2.5 bar at the inlet with the trigger pulled, fan fully open, 50 % overlap. On a 1.5 mm tip thin to 30 %.
Conventional spray
- Nozzle
- 1.6–1.8 (typ. 1.7) mmrecommended
- Pressure · air
- 3–4 barrecommended
- Spray viscosity
- 18–22 s DIN4recommended
- Consumption
- 150 g/m²dealer
Conventional air spray — per Technocolor's methods page, transfer efficiency is up to 40 %, so usage goes up.
Airmix (air-assisted airless)
- Nozzle
- 0.23–0.28 mmrecommended
- Pressure · fluid
- 60–100 barrecommended
- Pressure · air
- 1–2 barrecommended
- Spray viscosity
- 22–30 s DIN4recommended
- Consumption
- 150 g/m²dealer
Good fit for batch-sealing doors and fronts.
Process and compatibility
- Substrate preparation
- Dry wood (8–12 % MC), sanded P150–P180 (on stain — no sanding after staining), dust off.recommended
- Sanding · After (h)
- 4 hdealer
- Sanding · Grit
- 320–400 grit Precommended
- Temperature and humidity
- 18–25 °C, RH 50–70 %; all drying times above are at 20 °Crecommended
- Don'ts
- don't use the mix after its 3 h pot life
- don't go over 30 % thinner — you lose build
- don't sand before 4 h — the paper clogs
- don't spray below 15 °C
Storage
- Packaging
- 25 ldealer
- Storage temperature
- +5…+30 °C, tightly closed, away from heatrecommended
Safety: Flammable solvent-borne liquid; mixed with LNB21 it contains isocyanates. Spray in an extracted booth with an A2 carbon respirator (or air-fed), gloves and goggles. (Generic 2K PU requirements — no SDS found.)
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).
- t-colormarket.ru card (Wayback 2025-09-18): properties, uses, 150 g/m², LNB21 50/50, LZC1051 10–30, solids 47 ± 1 %, 37 s CF6, pot life 3 h, drying 45 min / 4 h / 24 h
- same card 2025-05-15: 883 руб./л, 25 l, под заказ
- same card 2022-10-05: 594 руб./л, out of stock; identical tech data
- dealer search index still lists LBA527 (MILESI), no price; detail URL redirects to 404
- Technocolor application methods page (conventional spray transfer efficiency)
Not covered by the sources
- no official t-color.ru page; live dealer page is 404 — data from Wayback captures only (product likely discontinued)
- density not published
- dust-free time not published (derived only)
- ready-to-spray viscosity not published (derived only)
- nozzle / pressure not published (derived only)
- max recoat window without sanding not published
- shelf life not published
- storage temperature not published
- not used in any official Technocolor finishing schedule
- no catalog transcript mentions LBA527
- alternative hardeners (e.g. LNB42/LNB77) not listed by the dealer
- thinner: the dealer lists only LZC1051 (sibling LBA521 officially allows LZC1026/LZC1051; LZC1026 is not confirmed for LBA527)
- no Milesi TDS found (faichim.com / edid-milesi.bg LBA527 PDFs return 404)