LRA98
LRA98 Clear polyester primer (sanding sealer)
Three-component clear unsaturated-polyester primer (base + LOB828 accelerator + LOB810 peroxide hardener). High solids, hardness, excellent resistance to shrink-back. Spray applied at 150 g/m². Used as a filling primer under clear closed-pore and high-gloss finishes on veneer and solid wood.
- clear filling primer for closed-pore finishes on veneer and solid wood
- build coat under high-gloss PE/PU lacquers (piano gloss, table tops)
- levelling - one heavy high-solids coat instead of several thin ones
Mix calculator
Ask about LRA98
Answers are based on the LRA98 data and the products it mixes with.
Mixing matrix
- LOB828Accelerator% by weight: 2 %official% by volume: 2 %official
Always. Without accelerator PE won't cure at room temperature.
Stir into the base FIRST and mix well, only then add the hardener. NEVER pour accelerator and peroxide hardener straight into each other - violent reaction, fire risk. (LRA52/LRA923 also allow LOB6AA1; for LRA98 only LOB828 is listed.)
- LOB810Hardener% by weight: 2 %official% by volume: 2 %official
Standard (peroxide) hardener for polyester, default choice.
Dealer: 'LOB810 - hardener for polyester materials', made by MILESI. Add AFTER the accelerator.
- LOB5Hardener% by weight: 2 %recommended% by volume: 2 %recommended
Hot shop, big batches, long time at the gun, heavy coats; per the dealer also for low application temperatures.
Replaces LOB810, not in addition to it. Drying and time to sand get longer. Test panel first.
- S10Thinner% by weight: 10 %official% by volume: 10 %official
Standard thinner. Fast, strong solvency; catalog lists it specifically for PE primers.
Officially 10 % (a single value, no range); don't go beyond - film build drops and pinholes/cratering get likelier. S10 SG 0.790±0.01; also the gun-wash solvent.
- S11Thinner% by weight: 10 %recommended% by volume: 10 %recommended
Hot shop (above ~25 °C) or big flat panels, when S10 flashes too fast to flow out.
Slower - more dust pick-up and sag risk on verticals. S11 SG 0.81±0.01.
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| Accelerator | LOB828 | 2 %official | 2 %official | Always. Without accelerator PE won't cure at room temperature.Stir into the base FIRST and mix well, only then add the hardener. NEVER pour accelerator and peroxide hardener straight into each other - violent reaction, fire risk. (LRA52/LRA923 also allow LOB6AA1; for LRA98 only LOB828 is listed.) |
| Hardener | LOB810 | 2 %official | 2 %official | Standard (peroxide) hardener for polyester, default choice.Dealer: 'LOB810 - hardener for polyester materials', made by MILESI. Add AFTER the accelerator. |
| Hardener | LOB5 | 2 %recommended | 2 %recommended | Hot shop, big batches, long time at the gun, heavy coats; per the dealer also for low application temperatures.Replaces LOB810, not in addition to it. Drying and time to sand get longer. Test panel first. |
| Thinner | S10 | 10 %official | 10 %official | Standard thinner. Fast, strong solvency; catalog lists it specifically for PE primers.Officially 10 % (a single value, no range); don't go beyond - film build drops and pinholes/cratering get likelier. S10 SG 0.790±0.01; also the gun-wash solvent. |
| Thinner | S11 | 10 %recommended | 10 %recommended | Hot shop (above ~25 °C) or big flat panels, when S10 flashes too fast to flow out.Slower - more dust pick-up and sag risk on verticals. S11 SG 0.81±0.01. |
Percentages are per 100 parts of component A.
Characteristics
- Solids
- highofficial
- Viscosity
- ≈20–30 s Ford cup 8 mm / CF-8 (est.; too thick for DIN4) srecommended
- Density
- 1.08–1.15 g/cm³recommended
- Pot life
- 0.33–0.5 hrecommended
- Drying · Dust-free
- 30–45 minrecommended
- Drying · Sand or stack
- 12–16 hrecommended
- Drying · Full cure
- 48–72 hrecommended
- Drying · Conditions
- 20 °C, 60–65 % RH
- Hardness
- high hardnessofficial
- Shrinkage
- excellent resistance to shrink-backofficial
- Elasticity
- low - rigid; LRA923 is the more elastic alternativerecommended
- Thixotropy
- norecommended
- Transparency
- standard (LRA923 = high-clarity grade)recommended
- Lightfastness
- moderate, tends to yellowrecommended
Application
HVLP
- Nozzle
- 2–2.5 (typ. 2.2) mmrecommended
- Pressure · air
- 2–2.5 barrecommended
- Spray viscosity
- 15–20 s Ford cup 8 mm (CF-8)recommended
- Consumption
- 150 g/m²official
- Wet film
- 130–145 µmrecommended
- Coats
- 1–2recommended
- Flash-off
- 20–40 min at 20 °Crecommended
- Recoat
- after sanding, ≈12–16 h at 20 °Crecommended
- Sanding between coats
- P240–P320 (P400 under high-gloss clear), after 12–16 hrecommended
- Gun distance
- 15–20 cmrecommended
Flush the gun with S10 straight after spraying, well inside pot life - gelled PE won't come out of the passages. Strain at 125–190 µm. On verticals don't overload the coat (not thixotropic).
Conventional spray
- Nozzle
- 1.8–2.2 (typ. 2) mmrecommended
- Pressure · air
- 3–4 barrecommended
- Spray viscosity
- 15–20 s Ford cup 8 mm (CF-8)recommended
- Consumption
- 150 g/m²official
- Coats
- 1–2recommended
Low transfer efficiency (up to 40 % per the official methods page) - PE overspray is sticky, extraction is a must.
Airless
- Nozzle
- 0.28–0.38 mmrecommended
- Pressure · fluid
- 120–180 barrecommended
- Consumption
- 150 g/m²official
Technocolor doesn't list airless for LRA98 - recommendation only. Pot life ≈20–30 min: tiny batches and an immediate S10 flush, or a plural-component rig with separate catalyst feed.
Airmix (air-assisted airless)
- Nozzle
- 0.28–0.33 mmrecommended
- Pressure · fluid
- 60–100 barrecommended
- Pressure · air
- 1.5–2 barrecommended
- Consumption
- 150 g/m²official
Not listed by Technocolor - recommendation. Same pot-life caveats as airless.
Process and compatibility
- Substrate preparation
- P150–P180 (veneer P180–P220), dust-free, wood MC 8–10 %recommended
- Sanding
- P240–P320 after 12–16 h; dust off thoroughlyrecommended
- Temperature and humidity · Min temp (°C)
- 15
- Temperature and humidity · Optimal temp (°C)
- 18–25
- Temperature and humidity · Relative humidity
- 50–70 %
- Don'ts
- Never mix the LOB828 accelerator and LOB810 hardener directly together - fire hazard
- Don't exceed 10 % thinner
- Don't spray below 15 °C
- Don't topcoat without sanding (wax layer)
- Don't leave the mix in the gun/pump - it gels in 20–30 min
- Don't spray over oily timbers without an isolating coat
Storage
- Shelf life
- ≈6 months (est.)recommended
- Storage temperature
- 5–25 °Crecommended
Safety: Contains styrene (flammable, harmful by inhalation) - spray in a booth with extraction, A2 respirator and gloves. Peroxide hardener is an oxidiser: keep away from the accelerator, metals and ignition sources, store in original containers, never pour spills back. Don't dump leftover mixed material into a waste drum - it exotherms as it cures.
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).
- официальная страница: свойства, распыление 150 г/м², LOB810 2/2 %, S10 10/10 %, LOB828 2/2 %
- дилер: LOB810 - отвердитель для ПЭ, MILESI
- дилер: LOB5 - медленный отвердитель для ПЭ (низкие температуры, толстый слой, жизнестойкость)
- сестринский продукт: тиксотропная версия; S10/S11, LOB828/LOB6AA1
- сестринский продукт: высокой прозрачности, более эластичный
- S10: уд. вес 0.790, быстрый, промывка
- S11: уд. вес 0.81
- методы нанесения: пневмо до 40 % переноса, airless до 200 бар для грунтов на больших плоскостях, airmix до 20 бар + 1-2 бар воздуха
- поиск дилера - результатов нет
- дилер, сестринский EPS20: сухой остаток 98±1 %, вязкость 23±2 с CF-8, жизнестойкость 20 мин / 3 ч, на отлип 40 мин, до шлифования 12 ч (основа для derived-оценок)
Not covered by the sources
- Нет страницы LRA98 у дилера t-colormarket.ru (поиск по коду пустой, прямые URL 404) - нет сухого остатка в %, вязкости, жизнестойкости, времён сушки, фасовки
- LRA98 отсутствует в каталоге Техноколор 2025-2026 (стр.12 перечисляет только ETS20/EPS22/ETL200/EPS20)
- Нет ТДС/техописания: lakokraska31.ru и woodonline.ru по LRA98 ничего не находят; файлы f_LRA52_*.pdf у сестринского продукта - страницы 404 Faichim, не ТДС
- Ни одна официальная технология отделки (information/technology) не использует LRA98
- solids_pct (число), viscosity, density, pot_life, все времена сушки, shelf_life, storage_temp, packaging - не опубликованы (в записи - только derived-оценки)
- Описание ускорителя LOB828 (тип, концентрация кобальта) не опубликовано ни на официальном сайте, ни у дилера
- Конкретный список совместимых финишных лаков для LRA98 не опубликован
- Ускоритель LOB828 у дилера t-colormarket.ru не найден (поиск по коду пустой)