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PU isolating primer DG 4720-0001

PU isolating primer DG 4720-0001

DG 4720-0001 is a transparent basecoat that is formulated for low viscosity and fast-drying. This coating material features a good isolation effect for use on resinous woods that are rich in active substances and is best suited for basecoats on very dark stained woods. DG 4720-001 is also suitable for stabilising softwood (improving scratch resistance). Moreover, sinkage is further reduced with DG 4720-0001 as an isolation sealer within a complete coating using high-solid, transparent basecoats and high gloss lacquers.

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Highlights
  • isolating effect against wood contents and on resinous woods
  • isolating effect beneath Hesse HYDRO lacquers
  • very stable base coat in the complete coating with high gloss
  • particularly transparent

Processing

  • 2C line
  • Airless Airless
  • Airless low pressure Airless low pressure
  • Airmix Airmix
  • Compressed air spraying Compressed air spraying
  • High-performance automatic spraying unit High-performance automatic spraying unit
  • Automatic spray gun Automatic spray gun
  • Spraying robot Spraying robot
3%sustain­able
  • water 1%
  • mineral resources 2%
  • fossil resources 97%

Areas of application

DG 4720-0001 can also be used for shopfitting and all interior fixtures and fittings, including in kitchens and bathrooms as well as the fitting out of ship interiors.

Technical information

Technical Specifications

Proportion of renewable raw materials % 0 %
Appearance colourless
VOC EU % 88,4 %
Number of layers (max) 3
Quantity per layers (min) 80 g/m²
Quantity per layers (max) 150 g/m²
Total quantity applied 400 g/m²
Mixing ratio (volumetric) 2 : 1 | Hardener: DR 4040
Mixing ratio (gravimetric) 100 : 58 | Hardener: DR 4040

Processing Instructions

Potlife 1 h / 20 °C
Drying 2 h / 20 °C
Due to hardening 7 d / 20 °C
Stackable according to 16 h / 20 °C
Surface sanding (grain size) 150 - 180
Intermediate sanding (grain size) 320 - 400
Yield per pass 6 m²/l
Processing information The process sequence and the number of coats required for insulation should be determined by applying a test coat to the original wood. Washing the wood with wood soap or Hesse Thinner DV 4900 beforehand can shorten the time taken. Please note that there may be changes to the colour and expressiveness of the wood as a result. A drying time of 16 h / 20 °C must be adhered to when working with content rich wood species! DG 4720-0001 can additionally be used on content rich, resinous woods or even on exotic wood species as an isolation sealer for transparent and coloured HYDRO lacquers. It should be noted that DG 4720-0001 must not be sanded back to the bare wood after drying and the required lacquer sanding. Please also observe the technical information for the respective HYDRO product. Conduct a trial coating on the original wood as necessary.
Special notes This product is not suitable for application on bleached surfaces and for coating wengé wood. For use as MDF edge insulation under coloured lacquer systems, prepare the lacquer/hardener mixture with 20 - 30 % DV 4994 thinner. Always apply another coat on the same day, after prior sanding with grit 320 - 400 grit. When used as a flame retardant coating material for seagoing vessels according to SOLAS 74 Reg. II-2/3, II-2/5, II-2/6 and X/3, as amended, IMO Resolution MSC.36(63)-(1994 HSC-Code) 7, IMO Resolution MSC.97(73)-(2000 HSC-Code) 7, IMO MSC/Circ. 1120, this product may only be combined with other approved and technically suitable products. When used as a flame retardant coating material for seagoing vessels, the maximum total application amount in wet film is 200 g/m².“A risk assessment was undertaken according to Directive 2014/90/EU, Annex II, Section 3. This coating does not pose a physical risk to health nor a risk to the environment when cured and dried.”

Procedure example

Contract installation in natural walnut, high gloss

Isolation: 2 x Hesse PU Isolating primer DG 4720-0001 with intermediate drying (20 - 30 min / 20 °C room temperature), mixing ratio (by volume) 2 : 1 with PU Hardener DR 4040 and the addition of 5 - 10 % Thinner DV 4994 in relation to the lacquer/hardener mixture

Drying: 2 h / 20 °C

Lacquer sanding: 320 - 400 grit (dust removal)

Basecoat: as necessary 2 - 3 x 100 - 250 g/m² Hesse PU Basecoat DG 4760 with intermediate drying (10 - 30 min / 20 °C room temperature), mixing ratio (by volume) 1 : 3 with PU Hardener DR 4038 and the addition of 20 - 30 % Thinner DV 4935 or DV 4981 (at high temperatures and on large surfaces) in relation to the lacquer/hardener mixture

Drying: at least 16 h / 20 °C

Lacquer sanding: 320 - 400 grit (dust removal)

Basecoat: as necessary 2 - 3 x 100 - 250 g/m² Hesse PU Basecoat DG 4760 with brief intermediate drying (10 - 30 min / 20 °C room temperature) , mixing ratio (by volume) 1 : 3 with PU Hardener DR 4038 and the addition of 20 - 30 % Thinner DV 4935 or DV 4981 (at high temperatures and on large surfaces) in relation to the lacquer/hardener mixture

Drying: at least 16 h / 20 °C

Another basecoat can be applied if necessary. After adequate drying, sand the last basecoat layer using 400 - 800 grit depending on the type of wood and colour tone (dust removal).

Top coat: 2 x Hesse PU Brilliant lacquer DU 44099 with intermediate drying (20 - 30 min / 20 °C room temperature), mixing ratio (by volume) 2 : 1 with PU Hardener DR 4080 and the addition of 20 - 30 % Thinner DV 4935 in relation to the llacquer/hardener mixture

Dust dry: after 10 - 20 min / 20 °C

Ready for packaging/polishing: after at least 3 d / 20 °C

General Notes / Disclaimer

Our technical information is continually adapted to keep up to date with the latest technology and statutory regulations. The latest version is always available online at www.hesse-lignal.de or talk to your local account manager. This information is for advice and is based on the best knowledge available and careful research in line with the current state of the art. This information cannot be held as legally binding. We also refer you to our terms and conditions of business. Safety data sheet is provided in accordance with EC regulation no. 1907/2006.

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