water-based dye (CTH + CFH1 spray binder) under 2K solvent-borne polyurethane: high-solids clear PU primer PTS60 ×2 (legacy hardener C26 → PC25) + PU worktop lacquer PTL61 ×1 (→ PTL60 SM) with yellowing-resistant hardener (legacy C61 → PC60), slow thinner S70 and 0.5 % CTS lacquer tint
Finishing beech-veneered worktops (PU)
- Substrate
- Beech-veneered worktops / table tops (veneered face, solid or lipped edges)
- Result
- Stained beech with visible grain and even, blotch-free colour; a clear, hard PU film with semi-closed pores, satin (≈ 30 gloss), resistant to scratches, coffee and household cleaners.
- 01
Sanding the face
Abrasive: P150, P180, P220
Sanding the beech-veneered face. Don't linger at P150 on veneer — it sands through easily. Finishing at P220 gives an even, not-too-dark take-up of the water stain (official wood-prep page: finer grit = lighter tone).
- 02
Sanding the edges
Abrasive: K60, K80
Worktop edges (usually solid lipping) — remove cutter marks and overhangs. K60–K80 sponges are coarse: edges only, never on the veneered face.
- 03
Staining
CTH 100 %CFH1 400 %WATER 1000 % (Thinner)
- Consumption
- 80–100official
Working solution: 100 parts CTH concentrate (colour to sample) + 400 parts CFH1 binder + 1000 parts water. The binder evens out the colour on beech (less blotching) and holds the dye. Spray evenly wet-on-wet, no puddles; do the edges in the same pass.
Mix for this step
Mix calculator
gRatio 100 : 400.0 : 1,000.0
Component Weigh out CTHpart A 33.3 g CFH1base 133 g WATERThinner 333 g Total 500 g Covers roughly 6.25 m² at 80 g/m².
- 04
Drying
Drying: [object Object] °C, 20 min
The water stain must be fully dry before the PU primer; the raised grain is cut back when the first primer coat is sanded (step 7).
- 05
Priming (coat 1)
PTS60 100 %C26 50 % (Hardener)S50 20 % (Thinner)
- Consumption
- 150official
Mix: PTS60 100 + C26 (today PC25) 50 + S50 20 by weight; stir, stand 5–10 min, strain. A hard, high-solids primer — fills beech pores and resists shrink-back. Spray an even cross-coat; edges first and light. Coat 1 locks the water stain in — don't flood it or the colour can move.
- 06
Drying
Drying: [object Object] °C, 1.5 h
Forced dry at 30–35 °C. Flash off 10–15 min at room temperature first to avoid solvent popping. At 20 °C the primer is sandable only after ≈ 4 h (dealer).
- 07
Sanding the face
Abrasive: P240, P280, P320
Sand the primer without cutting through to the stain (that leaves light patches). Removes the grain raised by the water stain. De-dust.
- 08
Sanding the edges
Abrasive: K120
Light sponge sanding of the primed edges — careful on arrises, where the primer is thinnest.
- 09
Priming (coat 2)
PTS60 100 %C26 50 % (Hardener)S50 20 % (Thinner)
- Consumption
- 150official
Mix: PTS60 100 + C26 (today PC25) 50 + S50 20 by weight; stir, stand 5–10 min, strain. A hard, high-solids primer — fills beech pores and resists shrink-back. Spray an even cross-coat; edges first and light. Coat 2 levels the panel for the topcoat.
- 10
Drying
Drying: [object Object] °C, 1.5 h
As step 6.
- 11
Sanding the face
Abrasive: P240, P280, P320
Final sanding before the topcoat — the face must be evenly dull with no shiny spots (unsanded pores).
- 12
Sanding the edges
Abrasive: K120
As step 8. De-dust the whole panel thoroughly before the topcoat.
- 13
Topcoat
PTL61 100 %C61 50 % (Hardener)S70 30 % (Thinner)CTS 0.5 %
- Consumption
- 150official
Mix: PTL61 (today PTL60 SM) 100 + C61 (today PC60) 50 + S70 30 + CTS dye 0.5 by weight. One even 150 g/m² coat across the whole panel; uneven film on a satin lacquer shows up as gloss patches. The final coat is not sanded or polished.
- 14
Drying
Drying: [object Object] °C, 1.5 h
Forced dry after a 10–15 min flash-off (the slow S70 must leave before the oven). Full dry ≈ 8 h at 20 °C (PTL60 SM, dealer); wear and chemical resistance build over several days — no heavy use or harsh cleaners on the worktop for the first 5–7 days.
Ask about this system
Answers are based on this finishing schedule and its products.
System characteristics
- Coats
- 1 stain + 2 primer + 1 topcoatofficial
- Wet application (g/m²)
- 80–100 (stain) + 150 + 150 (primer) + 150 (topcoat) = 530–550 g/m²official
- Solids · Primer part A
- 50 ± 1dealer
- Solids · Primer hardener
- 28 ± 1 (PC25 as C26 equivalent)dealer
- Solids · Topcoat part A
- 34 ± 1 (PTL60 SM as PTL61 equivalent)dealer
- Solids · Topcoat hardener
- 29 ± 1 (PC60 as C61 equivalent)dealer
- Solids · Primer ready mix
- ≈ 38 %recommended
- Solids · Topcoat ready mix
- ≈ 27 %recommended
- Gloss
- 30 ± 3 gloss (semi-matt) expected gloss units, 60°dealer
- Viscosity · Primer part A
- 75 ± 5 s CF-4 (Ford cup 4 mm), 20 °Cdealer
- Viscosity · Topcoat part A
- 55 ± 5 s VZ-4, 20 °C (PTL60 SM)dealer
- Viscosity · Spray
- ≈ 20–25 s primer, ≈ 15–18 s topcoat (DIN4/VZ-4)recommended
- Thixotropy
- no — both primer and topcoat are free-flowing, made for flat horizontal panelsrecommended
- Pot life
- primer 3–4 h, topcoat 4 h at 20 °Cdealer
- Drying time · Dust-free or touch dry
- 20 min at 20 °C (primer and topcoat)dealer
- Drying time · Sandable or stackable
- 1.5 h at 30–35 °C (schedule); primer 4 h at 20 °Cofficial
- Drying time · Full dry
- 8 h at 20 °Cdealer
- Drying time · Service ready
- ≈ 5–7 days for full chemical/wear resistancerecommended
- Adhesion
- good — cross-hatch (DIN 53151) expected passrecommended
- Hardness
- high — primer 'high hardness' (official), topcoat 'high scratch resistance' (catalogue)official
- Elasticity
- moderate — hard rather than elasticrecommended
- Wear resistance
- good furniture/worktop grade; not parquet graderecommended
- Chemical resistance
- high to household liquids — coffee, cleaners, water, alcoholcatalog
- Lightfastness
- good for the topcoat — PC60 is in the yellowing-resistant group; primer hardener PC25 is aromatic (some ambering under the topcoat)catalog
- Hiding power
- n/a — transparent system; grain stays visibleofficial
- Pore finish
- semi-closed — two high-solids primer coats fill beech's fine poresrecommended
- Electrical conductivity
- not relevant — solvent-borne, applied by air/HVLP/airmixrecommended
- Coats
- 4
- Coats detail · Stain
- 1
- Coats detail · Primer
- 2
- Coats detail · Topcoat
- 1
- Sanding operations
- 6
- Min cycle time (h)
- 4.8