Arcwood WB 320 Water-Based Two-Component Polyurethane Lacquer
A water-borne two-component polyurethane lacquer cured with a water-dispersible polyisocyanate, reaching hardness, block resistance and chemical resistance close to the solvent-borne two-component grades with substantially less solvent in the booth. It stays water-white over pale timber and painted bases.
Grade Arcwood WB 320 | Range Wood and Furniture Coatings | Technology Two-component water-borne polyurethane, cured with a water-dispersible polyisocyanate
Technical Data Sheet
Arcwood WB 320
Issue 2026.09
1. Product description
A water-borne polyurethane lacquer cured with a water-dispersible polyisocyanate, reaching hardness, block resistance and chemical resistance close to the solvent-borne two-component grades while cutting solvent content in the booth substantially. It stays water-white over pale timber and painted bases, which makes it the usual choice on white and light grey furniture. It is the performance member of the WB family, above Arcwood WB 130 in the build sequence and used as the topcoat over it.
2. Features
- Water-white film over pale timber and white or light grey bases
- Hardness and chemical resistance close to the solvent-borne two-component grades
- Substantially lower solvent content in the booth
- Pot life of 2 to 4 hours
- Topcoat over Arcwood WB 130 stain
3. Recommended uses
Clear topcoat for white and light grey furniture, institutional and contract furniture and interior joinery on sealed timber, veneer, MDF and particle board, where the plant aims to reduce solvent use in the spray booth.
Substrates. Sealed solid timber and veneer, MDF and particle board, institutional and contract furniture, interior joinery, white and pale painted bases.
4. Typical properties
| Property | Typical value | Method |
|---|---|---|
| Technology | Two-component water-borne polyurethane, cured with a water-dispersible polyisocyanate | Formulation |
| Appearance | Liquid lacquer, curing to a water-white clear film | Visual |
| Non-volatile content by mass | 30 to 40 per cent | ISO 3251 |
| Supply viscosity, 4 mm flow cup at 30 degrees C | 14 to 25 s | 4 mm flow cup, customer or supplier protocol |
| Density at 30 degrees C | 1.00 to 1.10 g/cm3 | ISO 2811-1 |
| Pot life at 30 degrees C | 2 to 4 hours | ISO 9514 |
| Dry film thickness per coat | 30 to 40 microns | ISO 2808 |
| Konig pendulum damping hardness at 7 days | 60 to 80 s | ISO 1522 |
| Cross-cut adhesion | Classification 0 to 1 on correctly prepared and sealed substrate | ISO 2409 |
| Resistance to cold liquids: water, 48 per cent ethanol, coffee, vegetable oil | Close to the solvent-borne two-component grades; rating against the specified liquids confirmed on request | EN 12720 |
Typical values, not a specification. Values for each batch are given on its Certificate of Analysis.
5. Application
| Parameter | Guidance |
|---|---|
| Mixing | Mix with the water-dispersible hardener at the stated ratio, and mix only the quantity the line will use within the pot life of 2 to 4 hours |
| Surface preparation | Over a sealed base sanded with 320 to 400 grit, or over Arcwood WB 130 within 24 hours of staining |
| Dilution | Adjust only as instructed for the grade supplied |
| Film build | 2 coats at 30 to 40 microns dry per coat, within a complete interior system of 60 to 120 microns dry |
| Shop and drying conditions | Work between 15 and 35 degrees C with panels and material at shop temperature. Hold relative humidity below about 70 per cent so the film coalesces, and use forced air at 30 to 40 degrees C where the line allows. |
| Stacking | Not before 24 hours at 30 degrees C |
Process. Mix with the water-dispersible hardener, spray 2 coats at 30 to 40 microns dry per coat. Pot life 2 to 4 hours. Hold relative humidity below about 70 per cent so the film coalesces, and use forced air at 30 to 40 degrees C where the line allows. Stack after 24 hours.
6. Storage and handling
Store base and water-dispersible hardener in their original, tightly closed containers in a cool, covered area, protected from frost and direct sunlight, keeping the hardener sealed against moisture. Shelf life is stated on the label and Certificate of Analysis. Handle and use the product in line with its Safety Data Sheet.
7. Safety and regulatory information
Read the Safety Data Sheet before use. Safety Data Sheets and regulatory declarations are issued by our technical centre against the product and batch supplied, so they are sent on request rather than published. Request a Safety Data Sheet or declaration.
This Technical Data Sheet is published for on-screen reference. The information is given in good faith from laboratory and application experience and describes typical values; it is not a specification and does not replace a trial on your own substrate and line. Arctic Materials may revise this sheet without notice. Issue 2026.09.
Technical Data Sheets on this site are for on-screen viewing. For a controlled copy, write to tech@arcticmaterials.com.
Other grades in this range
Need a Safety Data Sheet, a regulatory declaration or a grade specified to your line? Contact our technical centre.