LNB613
LNB613 hardener for PU coatings
Milesi isocyanate hardener for two-pack polyurethane coatings. It has no page of its own on t-color.ru — it only appears as the second component of the white thixotropic PU primer LBR102 (alternative to LNB77: 40 wt% / 55 vol% instead of 50 % / 65 %). Per the Milesi TDS the LNB613 mix gives 'excellent elasticity and filling power' and a longer pot life (4 h for LBR102, 3 h for LBR90 vs 2 h with LNB77). Solids 26 ± 1 %.
- second component of LBR102 white thixotropic PU primer (official, 40 wt%)
- second component of LBR90 black PU primer (Milesi TDS, 40 wt%; t-color.ru only lists LNB77 for LBR90)
- second component of Milesi LBR608 PU primer (dealer test, 2:1 by volume)
Ask about LNB613
Answers are based on the LNB613 data and the products it mixes with.
Mixing matrix
- LBR102base% by weight: 40 %official% by volume: 55 %official
Alternative: LNB77 at 50 wt% / 65 vol% (2 h pot life).
- LBR90base% by weight: 40 %datasheet% by volume: 49.5 %datasheet
Official t-color.ru pairing is LNB77 at 40 wt% / 50 vol% (the Milesi TDS gives LNB77 50 wt% / 62.8 vol%).
- LBR608base% by volume: 2:1 (base:hardener) ≈ 50 % v/vdealer
Dealer test (Poland): LBR608 + LNB613 2:1 by volume + LZC1026 30 % over LBR21811 isolant, wet-on-semi-dry, 2nd coat after 30 min.
LBR608 not found in the Technocolor range.
- LZC1026Thinner% by weight: 20 %datasheet% by volume: 31 (LBR102) / 28 (LBR90) % v/vdatasheet
Thinner in the LNB613 mix per the Milesi TDS; t-color.ru gives 10–30 wt% for LBR102.
- % by weight: 10–30 %official% by volume: 15–40 %official
Official alternative thinners for LBR102 (with LNB77 or LNB613).
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| base | LBR102 | 40 %official | 55 %official | Alternative: LNB77 at 50 wt% / 65 vol% (2 h pot life). |
| base | LBR90 | 40 %datasheet | 49.5 %datasheet | Official t-color.ru pairing is LNB77 at 40 wt% / 50 vol% (the Milesi TDS gives LNB77 50 wt% / 62.8 vol%). |
| base | LBR608 | — | 2:1 (base:hardener) ≈ 50 % v/vdealer | Dealer test (Poland): LBR608 + LNB613 2:1 by volume + LZC1026 30 % over LBR21811 isolant, wet-on-semi-dry, 2nd coat after 30 min.LBR608 not found in the Technocolor range. |
| Thinner | LZC1026 | 20 %datasheet | 31 (LBR102) / 28 (LBR90) % v/vdatasheet | Thinner in the LNB613 mix per the Milesi TDS; t-color.ru gives 10–30 wt% for LBR102. |
| Thinner | LZC1051 / LZC8643 | 10–30 %official | 15–40 %official | Official alternative thinners for LBR102 (with LNB77 or LNB613). |
Percentages are per 100 parts of component A.
Characteristics
- Solids
- 26 ± 1 %dealer
- Density
- 0.977 kg/ldatasheet
- Chemistry
- polyisocyanate (2K PU) hardener; aromatic vs aliphatic not publishedrecommended
- Reactivity
- slower / more elastic than LNB77: mix pot life 4 h (LBR102) and 3 h (LBR90) vs 2 h with LNB77; same 10 min dust-free, 30 min touch, 4 h sanding, 12 h hard drydatasheet
- Elasticity
- excellent elasticity and filling power (property line of the LNB613 option)datasheet
- Pot life · With LBR102
- 4 hdatasheet
- Pot life · With LBR90
- 3 hdatasheet
- Drying · Dust-free
- 10datasheet
- Drying · Touch-dry
- 30datasheet
- Drying · Sand or stack
- 4datasheet
- Drying · Full cure
- 24datasheet
- Drying · Conditions
- 18–22 °C, 65–70 % RH
- Mixed solids % · With LBR102
- 58.6 ± 2 %datasheet
- Mixed solids % · With LBR90
- 55.0 ± 2 %datasheet
- Mixed viscosity
- 20 ± 2 sdatasheet
- Water sensitivity
- isocyanate hardeners are sensitive to waterofficial
Application
Electrostatic
- Consumption
- 130–150official
- Wet film
- 112–130datasheet
- Spray viscosity
- 20 ± 2 sdatasheet
- Recoat
- between coats after 2 h (LBR102) / 1 h (LBR90); max 3 h (LBR102) / 4 h (LBR90) without sanding; topcoat after 20–24 h (LBR102) / 24 h (LBR90), after sandingdatasheet
- Nozzle
- 1.2–1.5recommended
LNB613 is never sprayed on its own — settings are for the LBR102/LBR90 + LNB613 mix.
HVLP
- Nozzle
- 1.7–2recommended
- Pressure · air · Inlet pressure, min
- 2
- Pressure · air · Inlet pressure, max
- 2.2
- Pressure · air · at the cap, max
- 0.7
- Pressure · air · Why ru
- Практика владельца с HVLP (заметки по ATL50 G: 2,0–2,2 бар на входе при нажатом курке) и стандартный предел 0,7 бар на воздушной головке HVLP; для LBR102/LNB613 не указано.
- Consumption
- 130–150official
- Coats
- 1–2recommended
- Sanding between coats
- after 4 h, P280–P320 on primerrecommended
Settings are for the mixed base; on a 1.5 tip thin toward the top of the range and accept less build.
Airmix (air-assisted airless)
- Nozzle
- 0.28–0.33recommended
- Pressure · fluid
- 40–80recommended
- Pressure · air
- 1–2official
For the mix only; start at the lowest fluid pressure that gives a clean fan.
Process and compatibility
- Substrate preparation
- wood moisture 8–14 %, clean, dust-freedatasheet
- Temperature and humidity
- apply 15–30 °C (optimum 18–22 °C), RH 50–70 % during drying (optimum 65–70 %); no drying below 15 °Cdatasheet
- Mixing
- shake the base well before use; add LNB613 and thinner by weight; shake/stir the complete mix again before use; decant only into polyethylene or stainless-steel containers; close cans carefully after usedatasheet
- Don'ts
- Don't eyeball it — on LBR102, LNB613 and LNB77 are dosed differently (40 % vs 50 % by weight, 55 % vs 65 % by volume).
- Don't leave the can open: isocyanate hardener reacts with moisture in the air, goes cloudy and gels.
- Don't use the mix past 4 h (LBR102) / 3 h (LBR90).
- Don't use under whites that must stay white without a test panel — Milesi labels LNB190, not LNB613, as yellowing-resistant.
Storage
- Storage temperature
- indoors, 0…+35 °C, ventilated, out of sunlight, tightly closeddatasheet
- Packaging
- 1 L,2.5 L,12.5 Ldealer
Safety: Contains isocyanates (including a volatile 'free' fraction) and organic solvents. Spray only in an extracted booth with an A2P2 respirator (air-fed is better), nitrile gloves and goggles. Highly flammable — keep away from flames and sparks.
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 page (fetched live 2026-10-04): hardener for PU materials, second component, solids 26 ± 1 %, manufacturer MILESI, packs 1 / 2.5 / 12.5 L, 1 479 ₽/л
- official LBR102 page: hardener LNB77/LNB613 at 50 % / 40 % by weight, 65 % / 55 % by volume; thinners LZC1026/LZC1051/LZC8643 10–30 % w / 15–40 % v
- dealer LBR102 page (fetched 2026-10-05): part A solids 72 ± 1 %, viscosity A 20 ± 2 s ВЗ-8, touch 30 min, full dry 4 h; mix table lists only LNB77 50 w / 65 v; LNB77 'for general use when electrostatic wettability is not needed'
- Milesi/IVM Chemicals US TDS LBR102 (2014-05) + LBR90 (2014-03), local copy src/pdf/milesi_lbr15_lbr90_tds_us.pdf: LNB613 density 0.977, solids 26.1, ratios 40 w / 55.3 v and 49.5 v, pot life 4 h / 3 h, drying, film build, conditions
- Polish dealer test: LBR608 + LNB613 2:1 by volume + LZC1026 30 %
- official glossary: isocyanates — volatile free fraction, water-sensitive
- official methods page: electrostatic works with any spray system; airmix fluid 'up to 20 bar', atomising air 1–2 bar
Not covered by the sources
- no official t-color.ru page; no Russian ТДС/SDS for LNB613 found
- aromatic vs aliphatic chemistry and yellowing resistance not published
- NCO content, viscosity and flash point of the hardener not published
- shelf life of the hardener itself not published (TDS 18 months refers to the primers)
- not present in the Technocolor 2025–2026 catalog hardener chart transcripts
- no Technocolor finishing schedule uses LNB613
- dealer stock packaging 1/2.5/12.5 L — prices per pack not all shown
- TDS URL (prowoodfinishes.com) returns HTTP 403 to scripted fetch; values verified against local copy src/pdf/milesi_lbr15_lbr90_tds_us.pdf (contains LBR102 + LBR90 sheets, issue 2014-05)
- all spray settings (nozzle, pressures) are derived — no official or TDS spray-equipment data for LBR102/LBR90 mixes