Hesse PUR OPTI-BASE DG 4750

  • thixotropic lacquer formulation, allowing very high material application on vertical surfaces
  • high filling power, so up to 1/3 fewer operations compared with traditional polyurethane basecoats
  • particularly transparent, creating an impressively high level of brilliance on light and dark types of wood
  • guarantees optimum ability to stay on vertical surfaces, resulting in a perfect high gloss appearance to the very highest standards
OPTI-BASE is an especially transparent base coat and excellent for closed-pore and very stable surface processes. Ideally suitable as an isolation sealer and base coat with very good body under high gloss. Given its thixotropic lacquer formulation, there are no problems with applying high coat thicknesses to vertical surfaces or edges.
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  • Description
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  • Sample process
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Fields of application

OPTI-BASE can also be used for shopfitting and all interior fixtures and fittings, including in kitchens and bathrooms and the fitting out of ship interiors.

Technical specifications

Appearance colourless
Density series kg/l 0.924
Flow time 55 s / DIN 53211 - 4 mm
Form of delivery fluid
Non-volatile content series % 26.2
VOC EU % 73.78 %
Number of coats (max) 8
Amount per layer (minimum) 120 g/m²
Amount per layer (max) 200 g/m²
Total application volume 1,600 g/m²
Mixing ratio (by volume) 1 : 5 PUR Hardener DR 4034
Mixing ratio (gravimetric) 100 : 551 PUR Hardener DR 4034

Information on use

Usage time 5 h / 20 °C
Pot life 7 h / 20 °C
Drying 16 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 - 180
Intermediate sanding (grits) from-to 320 - 600
Finishing After sufficient drying and lacquer sanding as per instructions, it can be re-coated with Hesse PU Acrylic brilliant Lacquer DU 45229, Hesse PU brilliant Lacquer DU 44099 or DU 449, ADAMANT DU 48999 as applicable, or with Hesse PU Multicoat lacquer series DE 55x(gloss level), DE 4259x(gloss level), DE 56x(gloss level) or DE 4503x(gloss level).
Yield per coat 5 - 8 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

Its high thixotropy means that the flow behaviour when mixing OPTI-BASE DG 4750 with DR 4034 is not comparable with the usual furniture lacquers. The base lacquer is somewhat more viscous. This results in the need for more accuracy when determining the amounts for the lacquer / hardener mixture. Woods rich in active substances or those with a high wax or oil content may in certain circumstances negatively impact the adhesion and drying properties of OPTI-BASE. It is therefore advisable to conduct a trial coating under practical conditions to assess the colour effect, bond and drying process!

Particular instructions This coating material is not suitable for application on bleached surfaces!
Please note the application example concerning wet-on-wet application of DG 4750!

This product must only be combined with other approved and technically suitable products when it used as a flame retardant coating material 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 used as a flame retardant coating material for seagoing vessels using DG 4750 is 120 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.”

General instructions on workmanship PU lacquers should not be applied or dried at material and room temperatures of less than 18 °C and 40 % RH, ideal values: 20 - 25 °C, 50 - 65 % RH. Deviations will result in drying or curing faults. To avoid adhesion problems, please sand PU lacquered surfaces before applying fresh lacquer and apply lacquer to these sanded surfaces as soon as possible. Old lacquer/hardener mixtures will affect the surface quality (adhesion/resistance). If stored correctly (at least 20 °C room temperature), complete hardening of the coating is achieved after a week. Please apply a test coat under real conditions!

Ship interior in stained mahogany, high-gloss
Bare wood sanding: 150 - 180 grit (dust removal)
Wiping stain: BE 15-20400
Drying: 2 - 3 h / 20 °C
Isolation: 1 x 120 - 160 g/m² Hesse PUR OPTI-BASE DG 4750, mixing ratio (by volume) 1 : 5 with PU Hardener DR 4034 and addition of 50 % PU Thinner DV 4994 to the lacquer/hardener mixture
Intermediate drying: 20 - 30 min / 20 °C
Isolation: 1 x 120 - 160 g/m² Hesse PUR OPTI-BASE DG 4750, mixing ratio (by volume) 1 : 5 with PU Hardener DR 4034 and addition of 50 % PU Thinner DV 4994 to the lacquer/hardener mixture
Drying: > 16 h / 20 °C
Lacquer sanding: 320 - 400 grit (dust removal)
Basecoat: 1 x 150 - 200 g/m² Hesse PUR OPTI-BASE DG 4750, mixing ratio (by volume) 1 : 5 with PU Hardener DR 4034 and addition of 20 - 25 % PU Thinner DV 4994 to the lacquer/hardener mixture
Intermediate drying: 20 - 30 min / 20 °C
Basecoat: 1 x 150 - 200 g/m² Hesse PUR OPTI-BASE DG 4750, mixing ratio (by volume) 1 : 5 with PU Hardener DR 4034 and addition of 20 - 25 % PU Thinner DV 4994 to the lacquer/hardener mixture
Drying: > 16 h / 20 °C
The more porous the wood, the more basecoats to be applied. Although a maximum application amount in wet film of 400 g/m² may be applied on one working day, since a drying time of > 16 h / 20 °C is then required! Apply sufficient basecoats until the surface to be coated has closed pores prior to lacquer sanding! The drying time for the final basecoat using OPTI-BASE DG 4750 should be > 48 h / 20 °C! PU Thinner DV 4981 can optionally be used at higher temperatures or if very large surfaces are being coated.
Lacquer sanding of the final basecoat: graduating from 400 - 600 grit (dust removal)
Top coat: 1 x 100 - 120 g/m² Hesse PU Brillant lacquer DU 44099, mixing ratio (by volume) 2 : 1 with PU Hardener DR 4080 and addition of 10 - 20 % PU Thinner DV 4994
Intermediate drying: 20 - 30 min / 20 °C
Top coat: 1 x 100 - 120 g/m² Hesse PU Brillant lacquer DU 44099, mixing ratio (by volume) 2 : 1 with PU Hardener DR 4080 and addition of 10 - 20 % PU Thinner DV 4994 to the lacquer/hardener mixture
Packable / ready for polishing: > 3 d / 20 °C

Contact

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.