LNB71
LNB71 polyurethane hardener (Milesi) for adhesion primers
Isocyanate hardener (second component) made by MILESI and supplied by Technocolor. The dealer (Holzcom) calls it 'a hardener for adhesion primers… used as the second component of adhesion PU primers for PU foam', solids 50 ± 1 %. There's no product page on t-color.ru; officially it only appears on the LBR40, LBR43 and LBR45 PU-foam primer pages — 20 % by weight / 30 % by volume, with LNB16405 as an equal alternative. A code search on t-colormarket.ru returns nothing.
- second component of the PU-foam/MDF primers LBR40 (white), LBR43 (walnut), LBR45 (mahogany) — 20 % by weight / 30 % by volume
- second component of MILESI adhesion PU primers for PU-foam parts (per dealer description)
Ask about LNB71
Answers are based on the LNB71 data and the products it mixes with.
Mixing matrix
- LBR40base% by weight: 20 %official% by volume: 30 %official
LBR40 — white PU primer for PU foam and MDF. The official page lists the hardener as 'LNB71/LNB16405': either one works, same dose — 20 % by weight (30 % by volume).
Fixed dose — weigh it, don't eyeball it. Don't blend LNB71 and LNB16405 in the same mix.
- LBR43base% by weight: 20 %official% by volume: 30 %official
LBR43 — walnut-tinted PU primer for PU foam. The official page lists the hardener as 'LNB71/LNB16405': either one works, same dose — 20 % by weight (30 % by volume).
Fixed dose — weigh it, don't eyeball it. Don't blend LNB71 and LNB16405 in the same mix.
- LBR45base% by weight: 20 %official% by volume: 30 %official
LBR45 — mahogany-tinted PU primer for PU foam. The official page lists the hardener as 'LNB71/LNB16405': either one works, same dose — 20 % by weight (30 % by volume).
Fixed dose — weigh it, don't eyeball it. Don't blend LNB71 and LNB16405 in the same mix.
- LZC1051Thinner% by weight: 10–30 %official% by volume: 20–40 %official
The standard thinner for LBR primers on LNB71: 10 % for maximum build on flat work; 20–30 % for verticals, carved PU-foam mouldings, or a tip under 1.8 mm.
Hardener first, stir, then the thinner.
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| base | LBR40 | 20 %official | 30 %official | LBR40 — white PU primer for PU foam and MDF. The official page lists the hardener as 'LNB71/LNB16405': either one works, same dose — 20 % by weight (30 % by volume).Fixed dose — weigh it, don't eyeball it. Don't blend LNB71 and LNB16405 in the same mix. |
| base | LBR43 | 20 %official | 30 %official | LBR43 — walnut-tinted PU primer for PU foam. The official page lists the hardener as 'LNB71/LNB16405': either one works, same dose — 20 % by weight (30 % by volume).Fixed dose — weigh it, don't eyeball it. Don't blend LNB71 and LNB16405 in the same mix. |
| base | LBR45 | 20 %official | 30 %official | LBR45 — mahogany-tinted PU primer for PU foam. The official page lists the hardener as 'LNB71/LNB16405': either one works, same dose — 20 % by weight (30 % by volume).Fixed dose — weigh it, don't eyeball it. Don't blend LNB71 and LNB16405 in the same mix. |
| Thinner | LZC1051 | 10–30 %official | 20–40 %official | The standard thinner for LBR primers on LNB71: 10 % for maximum build on flat work; 20–30 % for verticals, carved PU-foam mouldings, or a tip under 1.8 mm.Hardener first, stir, then the thinner. |
Percentages are per 100 parts of component A.
Characteristics
- Solids
- 50 ± 1 %dealer
- Properties
- Hardener for adhesion primers.dealer
- Chemistry
- polyisocyanate hardener for 2K PU (aromatic vs aliphatic not stated)recommended
- Density
- ≈ 1.0 g/mlrecommended
- Pot life
- 2 hdealer
- Lightfastness
- unknown; treat as not light-stable under clear or pale topcoatsrecommended
- Drying · Conditions
- 20 °C
Application
HVLP
- Nozzle
- 1.8–2
- Pressure · air · Inlet pressure, min
- 2
- Pressure · air · Inlet pressure, max
- 2.5
- Pressure · air · at the cap, max
- 0.7
- Consumption
- 120official
- Why ru
- LNB71 используется только в смеси с LBR40/43/45. Это тиксотропные пигментированные ПУ-грунты с ~70 % сухого остатка в компоненте A (данные дилера по LBR40), расход 120 г/м² — тот же класс, что PPS50277 владельца (73 %), которому нужно 1,8–2,0 мм, а 1,5 мало. Давление на входе и на воздушной головке — по стандартным ограничениям HVLP (≤ 0,7 бар на головке).
Tip and pressure are set for the LBR primer mix, not for the hardener. On a 1.5 mm tip thin with LZC1051 to 25–30 % and accept less build.
Airmix (air-assisted airless)
- Nozzle
- 0.28–0.33
- Pressure · fluid
- 60–100
- Pressure · air
- 1–2
- Why ru
- Тиксотропный пигментированный грунт с высоким сухим остатком: сопло airmix 11–13 тысячных дюйма при давлении материала 60–100 бар укладывает полные 120 г/м² без потёков — стандартная практика для этого класса; официальная страница методов рекомендует airmix для вязких материалов с высоким сухим остатком.
For production runs of PU-foam mouldings. Thin 10–15 % with LZC1051.
Process and compatibility
- Mixing
- Weigh out LBR primer (part A) 100, add LNB71 20 by weight, stir, then LZC1051 10–30. Let it stand 5–10 min and strain (125–190 µm). Don't mix more than you'll spray in about 2 h.recommended
- Temperature and humidity
- 18–25 °C, RH max 70 %; in humid air the isocyanate reacts with water — blushing and micro-bubbles.recommended
- Don'ts
- don't blend LNB71 and LNB16405 in one mix — pick one
- don't eyeball the dose: too little gives a soft film and poor adhesion to the foam, too much makes it brittle
- don't put it into Technocolor PC/AC/EC/C-hardener systems without a test — compatibility isn't published
- don't leave the can open: it picks up moisture, goes cloudy and gels
Storage
- Storage temperature
- +5…+25 °C, tightly closed, in a dry placerecommended
- Packaging
- 5 L (арт. LNB71/5)dealer
Safety: Contains isocyanates and organic solvents. Spray only in an extracted booth, wearing an A2P2 respirator (air-fed is better), nitrile gloves and goggles. Highly flammable.
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: MILESI PU hardener LNB71, solids 50 ± 1 %, 'hardener for adhesion primers', 2nd component of adhesion PU primers for PU foam; 5 L pack LNB71/5 (live check 2026-10-05; redirects to timb.ru, price on request)
- official dealer shop search: no results for LNB71 (re-checked 2026-10-05)
- LBR40: LNB71/LNB16405 20 wt% / 30 vol%; LZC1051 10–30 wt% / 20–40 vol%; spray 120 g/m²; thixotropic
- LBR43: same ratios
- LBR45: same ratios
- LBR40 dealer: solids 70 ± 1 %, pot life 2 h (cached snippet) — page still 404 on 2026-10-05; pot life not re-verifiable
- official PU-foam finishing schedule (uses PPS20040/C20040, not LNB71) — 4 h primer drying reference
- isocyanate hardeners are moisture-sensitive
- application methods
Not covered by the sources
- no official t-color.ru product page
- not listed on t-colormarket.ru (code search returns nothing)
- no MILESI/Technocolor TDS or SDS PDF found (session web-search budget exhausted)
- aromatic vs aliphatic isocyanate type
- viscosity
- measured density (the '1.00 ± 0.01' figure quoted in the LBR40 record could not be found on the cached dealer page)
- NCO content
- shelf life (unopened)
- official storage temperature
- flash point / hazard classification
- price (Holzcom: price on request)
- not used in any official finishing schedule
- not in the 2025–26 Technocolor catalogue transcripts