Hesse UNA-PUR DE 55x(gloss level)

  • universal use
  • simple application
  • can be used on bleached woods; superb adhesion properties
UNA-PUR is a light fast and transparent multicoat lacquer. Its wide variety of uses and uncomplicated application make UNA-PUR outstanding as a multi-coat lacquer on all customary wood species and in parallel an excellent finishing lacquer on Hesse PU colour lacquers. Given its superb adhesion properties, UNA-PUR can also be applied on bleached woods in gloss levels from dull matt to glossy.
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  • Description
  • Information on use
  • Sample process
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Fields of application

UNA-PUR can be used for shopfitting and all interior fixtures and fittings, including in kitchens and bathrooms as well as the fitting out of ship interiors. UNA-PUR can in parallel be used in different hardening versions. Detailed information on this can be found under “Specific instructions” in this technical information.

Technical specifications

Appearance colourless
Density series kg/l 0.92 - 0.933
Flow time (+/- 15 %) 30 s / DIN 53211 - 4 mm
Form of delivery fluid
Non-volatile content series % 23 - 25
Proportion of renewable raw materials % 0.2 - 0.5
VOC EU % 76.75 %
Number of coats (max) 3
Amount per layer (minimum) 100 g/m²
Amount per layer (max) 150 g/m²
Total application volume 450 g/m²
Mixing ratio (by volume) 10 : 1 PU Hardener DR 4070
Mixing ratio (gravimetric) 100 : 10 PU Hardener DR 4070

Information on use

Usage time 8 h / 20 °C
Pot life 3 d / 20 °C
Drying 2 h / 20 °C
Stackable after > 16 h / 20 °C
Complete drying 7 d / 20 °C
Surface preparation

Clean, dry wood, dependent upon wood type and method of application

Substrate sanding grits from-to 150 - 400
Lacquer sanding (grit) from - to 280 - 400

Coat with products from the same series after drying and lacquer sanding.

Yield per coat 6 - 9 m²/l

The spreading rate is heavily dependent on the type of application. The specifications relate to a liter of ready-for-use product, if necessary including hardener and thinner.
Storage temperature 16 - 25 °C
Working temperature 20 °C
Processing instructions Hardening the lacquer (by volume) at 5 : 1 with PU Hardener DR 4070 or 10 : 1 with PU Hardener DR 4071 is advisable when coating critical substrates or to optimise chemical and mechanical resistance. Hardening the lacquer (by volume) at 5 : 1 with PU Hardener DR 4076-0001 after prior mixing of 5 % Glass lacquer additive EL 460-0025 to the lacquer components also enables direct coating on glass. The glass surface to be lacquered should be cleaned properly beforehand using Cleaning thinner ZD 101.
Particular instructions The stated mixing ratios relate to volumetric hardening; exceptions are highlighted.
This product must only be combined with other approved and technically suitable products when used as a flame-retardant coating for seagoing vessels according to the latest version of SOLAS 74/88 Reg. II-2/3, II-2/5 and II-2/6, IMO Resolution MSC.36(63)-(1994 HSC-Code) 7 and IMO Resolution MSC.97(73)-(2000 HSC-Code) 7. The maximum application amount in wet film when using this product as a flame retardant coating material for seagoing vessels is 150 g/m².
Its dull matt configuration means that UNA-PUR may not be used as a Multicoat lacquer, but only as a 1-coat finish! Our UNA-PUR Multicoat lacquer is ideally suited for finishing Hesse UNA-COLOR and produces outstanding metal marking resistance.
UNA-COLOR DB 45245-(colour tone) can be used to tint UNA-PUR. Pre-priming is possible depending on surface requirements and substrate, for instance using Hesse Basecoats DG 434, DG 417, DG 468-1 and DG 4763.
“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.”
General instructions on workmanship

PU lacquers should not be applied or dried at material and room temperatures below 18 °C and 40 % ambient humidity, ideal values: 20 - 25 °C and 50 - 65 % RH. Deviations lead to problems with drying and/or curing. To avoid adhesion problems, please gently sand back the PU lacquered surfaces before applying fresh lacquer and apply lacquer to the sanded surfaces as soon as possible. Mixed residues from the previous day must only be used as a 10 - 20 % aggregate in a fresh lacquer/hardener mixture. Old lacquer/hardener mixtures impair the surface quality (adhesion/stability). Freshly bleached wood must be allowed at least 48 h intermediate drying / 20 °C before recoating with PU lacquers. The final hardness of the coating is achieved after one week in correct storage conditions (at least 20 °C room temperature).
Please apply a test coat under real conditions!

Pharmacy fittings in natural rosewood, satin gloss, open-pored
Wood sanding: 150 - 180 grit (dust removal)
Basecoat: 1 x 100 - 150 g/m² UNA-PUR DE 557 / 20 °C room temperature, mixing ratio (by volume) 10 : 1 with PU Hardener DR 4070
Intermediate drying: 2 h / 20 °C. Lacquer sanding: 280 - 320 grit (dust removal)
Top coat: 1 x 100 - 150 g/m² UNA-PUR DE 557 / 20 °C room temperature, mixing ratio (by volume)
10 : 1 with PU Hardener DR 4070
Packable: after at least 16 h / 20 °C


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.