PU sealer (PTS71+PC72) → polyester primer ×2 (EPS20+EA1+EC1) → 2K PU gloss enamel (PPL200+AC200) → polished
High-gloss finish for MDF bathroom fronts (PE + PU)
- Substrate
- MDF (bathroom furniture fronts, including routed ones)
- Result
- Opaque high-gloss enamel (white or tinted to RAL/NCS), 100 gloss, polished to a mirror finish over a thick, non-shrinking polyester primer.
- 01
Sanding the MDF
Abrasive: P150, P180, P220
Prepare the raw MDF going P150 → P180 → P220 in order. Don't skip a grit, or the coarser scratches will telegraph through the gloss. De-dust before the sealer.
- 02
Sanding edges and profiles
Abrasive: K60, K80
K60/K80 mats are for routed detail, edges and anywhere the belt can't reach. The 'K' grading is copied from the schedule; Technocolor gives no P-scale equivalent. Routed MDF edges soak up far more than the face, and they're exactly what the next sealer coat locks down.
- 03
Isolating sealer coat
PTS71 100 %PC72 50 % (Hardener)S50 20 % (Thinner)
- Nozzle · HVLP
- 1.3–1.4
- Nozzle · Conventional
- 1.2–1.4
- Nozzle · Airmix
- 0.18–0.23
- Nozzle · Why ru
- Не опубликовано. Компонент A PTS71 — 10±2 с VZ-4 при 21 % сухого остатка; с 50 % PC72 + 20 % S50 смесь примерно 11-14 с DIN4 — жидкий прозрачный изолирующий грунт с расходом всего 80-100 г/м², мелкие сопла не дают перелива (из out/products/pts71.json).
- Pressure · Hvlp inlet
- 1.8–2
- Pressure · Hvlp cap max
- 0.7
- Pressure · Conventional inlet
- 2.5–3.5
- Pressure · Why ru
- Не опубликовано. Маловязкий изолирующий грунт легко распыляется; лишний воздух даёт только туман и сухое напыление.
- Consumption
- 80–100
A thin barrier coat: it wets out and seals the MDF so the heavy polyester primer doesn't sink into the board and edges unevenly. Only 21 % solids - it's a seal, not a build coat.
- 04
Drying
Drying: 20-25 °C, 40 min
Goes straight under the polyester primer without sanding. Dealer: recoat without sanding after 40-60 min - 40 min is the minimum; in a cool shop give it closer to an hour.
- 05
Primer, coat 1
EPS20 100 %EA1 2 % (Accelerator)EC1 2 % (Catalyst)S10 15 % (Thinner)S11 15 % (Thinner)
- Nozzle · HVLP
- 2–2.5
- Nozzle · Conventional
- 1.8–2.2
- Nozzle · Airless
- 0.38–0.48
- Nozzle · Why ru
- Не опубликовано. EPS20 — сухой остаток 95–98 %, наполненный и пигментированный, 23±2 с Ford 8 мм (очень густой); даже с 15 % S10 остаётся тяжёлым, и 250 г/м² нужно наносить за один проход (из out/products/eps20.json).
- Pressure · Hvlp inlet
- 2–2.5
- Pressure · Hvlp cap max
- 0.7
- Pressure · Conventional inlet
- 3–4
- Pressure · Why ru
- Не публикуется. Тяжёлому высоконаполненному PE для распыления через сопло 2+ мм нужно больше воздуха, чем лаку.
- Consumption
- 250
White polyester build primer: almost everything sprayed stays on the panel and it barely shrinks back - this is what makes the mirror flat. Pot life is about 20 minutes, so mix only enough for a pass or two.
- 06
Flash-off between coats
Drying: 30-35 °C, 30 min
Warmth speeds up the PE gel; the second coat goes on without sanding (wet-on-tacky).
- 07
Primer, coat 2
- Nozzle
- same_as_step_5
- Pressure
- same_as_step_5
- Consumption
- 250
Same mix, fresh batch. 500 g/m² of wet PE primer in total - enough to sand dead flat without breaking through.
- 08
Warm drying
Drying: 30-35 °C, 30 min
- 09
Cure before sanding
Drying: 20-25 °C, 12 h
Matches the dealer's 12 h to sanding for EPS20 at 20 °C. Sanding sooner clogs the paper and leaves pits.
- 10
Sanding the primer
Abrasive: P240, P280, P320
Level the PE primer flat: P240 → P280 → P320. Don't cut through to the sealer on the edges.
- 11
Pad-sanding profiles
Abrasive: K150, K180
K150/K180 mats on routed detail and edges; then de-dust thoroughly - every speck shows under gloss.
- 12
Enamel topcoat
PPL200 100 %AC200 70 % (Hardener)S80 40 % (Thinner)
- Nozzle · HVLP
- 1.4–1.6
- Nozzle · Conventional
- 1.6–1.8
- Nozzle · Airmix
- 0.23–0.28
- Nozzle · Why ru
- Не опубликовано. Компонент A густой (14±2 с Ford 8 мм, сухой остаток 70 %), но с 70 % AC200 + 40 % S80 смесь даёт ~18-22 с DIN4; белой эмали со степенью блеска 100 нужно тонкое распыление для плёнки без шагрени (из out/products/ppl200.json).
- Pressure · Hvlp inlet
- 2–2.5
- Pressure · Hvlp cap max
- 0.7
- Pressure · Why ru
- Не опубликовано. Густой белой эмали нужен верх диапазона давления на входе HVLP для тонкого ровного факела; при работе с красконагнетательным баком — 0,8–1,5 бар по материалу.
- Consumption
- 150
The 100-gloss finish coat. Slow S80 gives maximum flow-out, which matters for gloss that will be polished. Spray in a clean booth, one full wet coat.
- 13
Warm drying
Drying: 30-35 °C, 30 min
- 14
Cure before polishing
Drying: 20-25 °C, 72 h
Technocolor's own definition: polishing only after full dry. The dealer gives 12 h full dry for PPL200, but the schedule asks for 72 h before polishing so the film reaches full hardness - otherwise the gloss dies back after a few days.
- 15
Polishing
3M Finesse-it (Product)
Abrasive: 3M Finesse-it 81820, 3M 06002 (особо тонкая / extra fine)
Polish to a mirror with 3M Finesse-it pastes. Nibs and orange peel are normally wet-sanded out first at P1500-P3000 - the schedule doesn't say so (derived).
Ask about this system
Answers are based on this finishing schedule and its products.
System characteristics
- Film build · Total wet (g/m²)
- 630-650 (PTS71 80-100 + EPS20 2×250 + PPL200 150)official
- Film build · Total dry film (µm)
- 250–320recommended
- Film build · Solids by layer
- PTS71, EPS20, PPL200, AC200
- Gloss
- 100 GU enamel, then polished to mirrordealer
- Hiding power
- high («высокая укрывная способность», incl. corners and edges)official
- Hardness
- high - hard PE primer + PU enamel with «excellent strength»; no pencil (ASTM D3363) or pendulum (ISO 1522) figures publishedcatalog
- Elasticity
- low-medium overall: ~250 µm of hard unsaturated polyester is the brittle part; the thin, flexible PTS71/PC72 layer underneath and the medium-hard AC200 enamel on top only partly buffer itrecommended
- Adhesion
- good on MDF via PTS71 («отличная адгезия к разным типам древесины»); intercoat adhesion PU→PE and PE→PU secured by the schedule itself: PE over PTS71 within 40 min-1 h unsanded, PU enamel only over PE sanded P240-P320official
- Wear resistance
- not published - expect good for vertical fronts (hard, thick system); no Taber datarecommended
- Chemical resistance
- high («физико-химическая стойкость»), which is what the bathroom use needs: water, cleaning agents, cosmeticsofficial
- Lightfastness
- good: AC200 ranks 8 of 10 for non-yellowing on the catalog hardener chart (only AC41/AC40 better). The yellowing-prone PC72 in the sealer is buried under opaque enamel, so it doesn't showcatalog
- Drying
- dust/touch: PTS71 40 min (schedule), EPS20 40 min to touch / 12 h to sanding (dealer), PPL200 1 h touch / 12 h full (dealer); system ready to polish 72 h after enamelofficial
- Thixotropy
- none of the three is thixotropic - fine for flat fronts, risk of sags on vertical sprayingcatalog
- Coats
- 4
- Coats breakdown
- 1 PU sealer + 2 PE primer + 1 PU enamel
- Min cycle time (h)
- 86.2
- Min cycle time breakdown
- 0.67 (step 4) + 0.5 (6) + 0.5 (8) + 12 (9) + 0.5 (13) + 72 (14) = 86.2 h of drying, excluding spraying, sanding and polishing time
- Wet consumption (g/m²)
- 630–650