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LZC8643

LZC8643 slow PU thinner

Slow-evaporating thinner for two-pack polyurethane and acrylic materials of the L/K line (LUA/LDA lacquers, LBA/LBR/LJA primers, enamels and tinting-system converters). Used to bring the catalysed mix to working viscosity for the chosen application method.

  • thinning PU and acrylic lacquers, primers, enamels and converters (see "mix")
  • hot shops, large flat panels, gloss and dead-matt finishes — wherever you need a longer wet edge and better flow-out

Ask about LZC8643

Answers are based on the LZC8643 data and the products it mixes with.

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Mixing matrix

  • LZC8643thinner_for
    % by weight: 20–40 %official% by volume: 20–40 %official

    LZC8643 and LZC70 are both officially 'slow'; per the Milesi TDS LZC8643 is slightly faster than LZC70 with stronger solvency.

  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 20–30 %official

    LZC8643 is the slow option; LZC1026 (universal, medium speed per the Milesi TDS) is for normal 18–22 °C conditions.

  • LZC8643thinner_for
    % by weight: 30–40 %official% by volume: 30–40 %official
  • LZC8643thinner_for
    % by weight: 10–30 %official% by volume: 15–45 %official
  • LZC8643thinner_for
    % by weight: 10–30 %official% by volume: 10–30 %official

    LZC8643 is the slow option; LZC1026 (universal, medium speed per the Milesi TDS) is for normal 18–22 °C conditions.

  • LZC8643thinner_for
    % by weight: 10–30 %official% by volume: 15–40 %official

    LZC8643 is the slow option; LZC1026 (universal, medium speed per the Milesi TDS) and LZC1051 (speed not published) are listed on the same page as alternatives.

  • LZC8643thinner_for
    % by weight: 10–40 %official% by volume: 15–50 %official

    LZC8643 is the slow option; LZC1026 (universal, medium speed per the Milesi TDS) and LZC1051 (speed not published) are listed on the same page as alternatives.

  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 20–30 %official

    LZC8643 and S80 are both slow thinners, listed on the page as equivalent options.

  • LZC8643thinner_for
    % by weight: 10–30 %official% by volume: 10–30 %official

    LZC8643 is the slow option; LZC1051 is listed on the same page as an alternative (LZC1051 evaporation speed not published).

  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 20–30 %official

    LZC8643 is the slow option; LZC1026 (universal, medium speed per the Milesi TDS) is for normal 18–22 °C conditions.

  • LZC8643thinner_for
    % by weight: 10–20 %official% by volume: 10–20 %official

    LZC8643 is the slow option; LZC1051 is listed on the same page as an alternative (LZC1051 evaporation speed not published).

  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 30–40 %official

    LZC8643 and S80 are both slow thinners, listed on the page as equivalent options.

  • LZC8643thinner_for
    % by weight: 10–30 %official% by volume: 10–30 %official
  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 20–30 %official

    LZC8643 and LZC70 are both officially 'slow'; per the Milesi TDS LZC8643 is slightly faster than LZC70 with stronger solvency.

  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 20–30 %official
  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 20–30 %official

    LZC8643 and LZC70 are both officially 'slow'; per the Milesi TDS LZC8643 is slightly faster than LZC70 with stronger solvency.

  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 20–30 %official
  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 20–30 %official
  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 20–30 %official
  • LZC8643thinner_for
    % by weight: 20–30 %official% by volume: 20–30 %official

Percentages are per 100 parts of component A.

Characteristics

Evaporation rate
'definizione=lento')official
Compatible chemistry
polyurethane,acrylicofficial
Effect on cure
Does not take part in the cure; within the officially listed % it does not change pot life or through-cure, but a slow thinner lengthens dust-free / touch-dry and flash-off, especially in thick coats and below 18 °C.recommended
Density
0.850 ± 0.01 g/cm³ (specific gravity)datasheet

Application

N/a

Why ru
Разбавитель — добавка к смеси; рекомендации по соплу/давлению относятся к распыляемому продукту, а не к растворителю.

Not applied on its own — added to the catalysed mix (base + hardener). Take nozzle and pressure from the base product record.

Process and compatibility

When to choose
shop above ~25 °C or very dry air, where the mix dries in flight (dry spray, orange peel); large flat panels and gloss lacquers/converters (KDA1, KHR1, LDA401, LUA460) — you need a long wet edge and flow-out (the Milesi TDS names gloss PU of the LDA/LHR series explicitly); dead-matt lacquers (LUA468) — more even sheen, no stripingsource
When not to use
cold shop (below ~18 °C) or verticals, chairs, mouldings — more sag and dust pick-up; use a faster thinner from the product page where one is listed (LZC1026 is medium per the Milesi TDS; LZC1051 speed is not published); heavy primer builds: slow solvent stays in the film longer, so sanding comes laterrecommended
Goes into
KDA1, KGA1, KHR1, KKR1, LBA42, LBR102, LBR21811, LDA401, LGA180, LJA99, LKR181, LKR6AB16, LUA2010, LUA460, LUA461, LUA462, LUA463, LUA464, LUA465, LUA468
Temperature and humidity
Mix and apply at 18–25 °C, RH 50–70 %; use LZC8643 at the upper end of that range or above it.recommended
Don'ts
  • don't exceed the thinning % on the base product page — lower build and hiding, more sags
  • not for waterborne products
  • don't use in polyester (styrene) or UV products unless the maker says so
  • don't blend different thinners in one batch without a test panel

Storage

Storage temperature
Tightly closed original container, cool ventilated place away from heat and ignition sources, +5…+25 °Crecommended

Safety: Highly flammable liquid; vapours are harmful. Use in an extracted spray booth with an A-filter (organic vapour) respirator, nitrile gloves and eye protection. No smoking, sparks or naked flames; earth the equipment. (Generic solvent rules — no Technocolor SDS was found.)

Mixed into

KDA1 / KGA1 / KHR1 / KKR1 / LBA42 / LBR102 / LBR21811 / LDA401 / LGA180 / LGA20 / LGA21 / LGA210 / LGA22 / LGA531 / LGA6AB14 / LGA6AB16 / LHR4010 / LJA99 / LJR601 / LKR181 / LKR6AB14 / LKR6AB16 / LNB010 / LNB110 / LNB613 / LNB6A37 / LNB77 / LUA118 / LUA2010 / LUA460 / LUA461 / LUA462 / LUA463 / LUA464 / LUA465 / LUA468 / LZC8643

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).

Not covered by the sources
  • composition / solvent blend not published
  • not listed at t-colormarket.ru (search and thinner category checked 2026-10-04) or at woodonline/lakokraska31/ndom31 search
  • not in the Technocolor 2025-2026 catalog thinner table (that table covers only the S-line)
  • packaging sizes and shelf life unknown
  • not used by any official finishing schedule (information/technology pages)
  • no numeric evaporation rate or flash point; density only from the 1998 Milesi sheet (0.850)
  • speed vs LZC70 only qualitative ('slightly faster', Milesi 1998)
  • no current Technocolor/Milesi single-product TDS or SDS found; web-search budget exhausted during this run
  • LZC1051 evaporation class unknown