LNB6A37
LNB6A37 hardener for polyurethane coatings
MILESI hardener for two-component polyurethane (acrylic-PU) coatings. It has no page on t-color.ru. Officially it appears only as a hardener for the LDA401 gloss acrylic lacquer, listed first alongside LNB110, at 70–100 % by weight and by volume. The Technocolor dealer (t-colormarket.ru) describes it as 'hardener for polyurethane materials; improved isolating power, ideal penetration into wood, excellent clarity'. It gives the use as 'isolating sealer for exotic species (rosewood, teak, etimoe, padauk, zebrano, etc.) and MDF'. That card text looks borrowed from the isolating sealer system this hardener goes with, and the dealer does not name that sealer base.
- second component of the LDA401 gloss acrylic lacquer: 70–100 % by weight / 70–100 % by volume
- per the dealer, hardener for an isolating sealer system for oily exotic species (rosewood, teak, etimoe, padauk, zebrano) and MDF; that system's base is not named
Ask about LNB6A37
Answers are based on the LNB6A37 data and the products it mixes with.
Mixing matrix
- LDA401base% by weight: 70–100 %official% by volume: 70–100 %official
LDA401 gloss acrylic lacquer: the first of two hardeners on the official page (the other is LNB110). Thinner in the same mix: LZC8643 or S80 at 20–30 %.
No official word on when to use LNB6A37 versus LNB110. The dealer describes LNB110 specifically as the hardener for gloss PU lacquers and enamels. Don't mix the two hardeners in one batch.
- LZC8643Thinner% by weight: 20–30 %official% by volume: 20–30 %official
MILESI slow PU thinner, listed first for LDA401 (the other is S80).
- S80Thinner% by weight: 20–30 %official% by volume: 20–30 %official
Technocolor slow thinner, the alternative to LZC8643 (above ~25 °C, large flat panels).
Workshop notes: S80 doesn't change cure time, but expect more dust pick-up and a higher sag risk.
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| base | LDA401 | 70–100 %official | 70–100 %official | LDA401 gloss acrylic lacquer: the first of two hardeners on the official page (the other is LNB110). Thinner in the same mix: LZC8643 or S80 at 20–30 %.No official word on when to use LNB6A37 versus LNB110. The dealer describes LNB110 specifically as the hardener for gloss PU lacquers and enamels. Don't mix the two hardeners in one batch. |
| Thinner | LZC8643 | 20–30 %official | 20–30 %official | MILESI slow PU thinner, listed first for LDA401 (the other is S80). |
| Thinner | S80 | 20–30 %official | 20–30 %official | Technocolor slow thinner, the alternative to LZC8643 (above ~25 °C, large flat panels).Workshop notes: S80 doesn't change cure time, but expect more dust pick-up and a higher sag risk. |
Percentages are per 100 parts of component A.
Characteristics
- Solids
- 43 ± 1 %dealer
- Viscosity
- 10 ± 2 sdealer
- Chemistry
- polyisocyanate hardener for 2K PU / acrylic-PU materialsdealer
- Density
- ≈ 1.0 g/mlrecommended
- Pot life
- 4 hdealer
- Drying · Touch-dry
- 40 mindealer
- Drying · Full cure
- 4 hdealer
- Drying · Conditions
- 20 °C
- Lightfastness
- Probably good (aliphatic), not confirmedrecommended
- Moisture sensitivity
- high — keep the can tightly closedrecommended
Application
Mixing
- Why ru
- Стандартная практика 2К. Взвешивание предпочтительнее, так как официальное соотношение дано по массе; жизнеспособность — по данным дилера.
The hardener is never applied on its own. Order: stir the base → add LNB6A37 by weight (scales beat a measuring cup) → mix → add thinner → strain (125–190 µm) → rest 5–10 min → check viscosity. Use the mix up within its pot life (dealer: 4 h at 20 °C, shorter in heat).
HVLP
- Consumption
- 100–150 (LDA401 mix) g/m²official
Nozzle and pressure are set for the mixed base, not the hardener.
Brush
- Consumption
- 250 g/m²dealer
Brushing applies only to the dealer's isolating sealer system; officially LDA401 is spray-only.
Process and compatibility
- Goes with
- LDA401
- Substrate preparation
- Exotic species (teak, rosewood, padauk, zebrano, etimoe) and MDF: an isolating coat to block oils and resins and to lock down raised grain (per the dealer).dealer
Storage
- Packaging
- 2,5 л,12,5 лdealer
- Shelf life
- ≈ 12 months unopenedrecommended
Safety: Contains isocyanates and organic solvents: flammable, harmful if inhaled, may sensitise the airways and skin. Work in an extracted spray booth wearing an A2/P2 respirator (air-fed is better), nitrile gloves and goggles. Ask Technocolor for the SDS.
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).
- dealer card: description, application area, solids 43±1 %, viscosity 10±2 s CF-4, pot life 4 h, touch 40 min, full dry 4 h, 250 g/m² spray/brush, 2.5/12.5 l packs, manufacturer MILESI
- official LDA401 page: hardener LNB6A37/LNB110 70–100 % by weight and volume; thinner LZC8643/S80 20–30 %; spray 100–150 g/m²
- dealer hardener list: LNB6A37 listed with MILESI hardeners LNB613, LNB77, LNB110 etc., from 1 891 ₽/l
- official definitions: pot life, drying stages, isocyanate type vs lightfastness
Not covered by the sources
- No official t-color.ru page and no TDS/SDS PDF found (other dealers lakokraska31/woodonline/ndom31 return nothing for LNB6A37; web search budget exhausted again at verification 2026-10-05)
- Not mentioned in any Technocolor catalog transcript, including the hardener chart, or in any official finishing schedule
- Unclear whether the dealer's solids 43 ± 1 % and viscosity 10 ± 2 s CF-4 describe the hardener itself or the part A of an unnamed isolating sealer
- The dealer's isolating sealer base (the system for exotic woods/MDF) is not named, so its mix ratio is unknown
- Isocyanate type (aliphatic vs aromatic) and yellowing resistance not stated
- No official guidance on when to choose LNB6A37 over LNB110 for LDA401
- Pot life and drying of the LDA401 + LNB6A37 mix specifically: unknown (dealer 4 h / 40 min / 4 h refer to an unnamed base)
- Density, NCO content, shelf life, storage temperature: not published
- Relationship to the plain 'LNB6' (Milesi LNB06) listed for LBA528 not confirmed