Accoya® wood building elements

The Accoya® wood production process that ‘enables nature’, creates a new durable, stable and beautiful product – that has the very best environmental credentials. Created from readily available sustainably sourced non-durable woods, Accoya® is designed to match or exceed the properties of the very best tropical hardwoods. Highly durable and stable, Accoya excels in any climate in tough applications.Accoya offers a multitude of finishes, with coatings looking brilliant and lasting longer than other wood types. Accoya is a truly sustainable choice that helps you make a difference to the challenges facing the world.

Enhancing the performance of Accoya®

Remmers believes that wood is a natural resource that must be protected. Accoya® windows and doors designed and manufactured using Remmers solutions or maintenance care kits will provide an extended service life with low maintenance. This is based on case studies and live window exposure since 2006. Remmers Induline premium coatings have been developed to enhance the longevity and protection of quality wood products and have proven to be a perfect match with the properties Accoya®. The effectiveness, longevity and ecological safety of Remmers Induline premium coatings are regularly tested by reputed institutions to guarantee performance. Remmers will work with you every step of the way to ensure that you have the best coating systems possible to meet your exact requirements.

See the full Induline range


Remmers opaque and translucent wood coatings on Accoya®



  • Jewish Museum, Berlin (DE)
  • Old Farmhouse, near Löngingen (DE)
  • Schoolkerk, Groningen (NL)
  • Sneek Bridge, Sneek (NL)
  • The Watch Factory, Prescot (UK)


14 year outdoor exposure test

Case study

Windows made from Accoya® wood with various coatings from Remmers have been exposed to natural weathering in the Netherlands for 14 years with no maintenance at all – and the results show no natural coating degradation or loss of performance.

The window was mounted in a framework rig to mimic real life installation in a natural vertical position with no shelter at the Accsys test field in Arnhem, with no maintenance care over the entire period. The purpose of the long-term test was initially to test for coating compatibility, but turned into a long term exposure test to determine the very long term effects of the outdoor elements on Accoya® wood products treated with Remmers coatings.

The coatings applied just once back in 2007 for this test were:

  • 1x Induline SW-900: water-based impregnation

  • 1x Induline GW-360: water-based priming (colour: oak)

  • 2x Induline LW-700: water-based translucent end-coating (colour: oak)

A recent reinspection of the test window was performed by Remmers in March 2021. Remmers said: “After this long most windows show poor coating performance and are not in a very good state. With our coatings on Accoya® wood, it is very different. There is no opening up of joints, no cracking or peeling, and the only sign of nearly a decade and a half of exposure is some very minor flaking over a small area, meaning coated Accoya® really stands the test of time"

These results offer proof that Remmers coatings intensively protects Accoya® wood, eliminating the need for maintenance or reapplication for over a decade.

Sneek Bridge, The Netherlands

Case study

The city of Sneek in the Netherlands has a rich maritime legacy, so when the new landmark entrance was designed, it was important to incorporate this. The design featuring exposed wood beams, representing an upturned fishing boat was brought to life with the help of Accoya® strength graded wood, finished with various Remmers applied coatings.

At the heart of this project, was the need for a durable, sustainable wood type with low CO2 emissions, as all bridges built in the Netherlands must have a lifespan of at least 80 years. To ensure this, approximately 1200m² of Accoya® strength graded wood with various applied coatings from Remmers were used for the construction. The supporting beams of the bridge were made by finger-jointing and laminating to the required dimensions. By using a Remmers coating on Accoya® wood, an extensive service life like this can be achieved with very little maintenance requirements. Additionally there is no risk of swelling or shrinking or opening up of joints, meaning Remmers coated Accoya® really stands the test of time.


  • Induline ZW-425

    Article No. 791805

    Induline ZW-425

    Water-based, opaque sealing filler applied by spraying

    Colour: white | 7918
    Colour: white | 7918
    Please choose a colour
    Size / Quantity

    Brochures and Catalogues


    Product specifications

    On delivery

    Binder acrylate resin / alkyd resin
    Density (20°C) approx. 1.18 g/cm³
    Odour characteristic
    Degree of gloss matt
    Viscosity (20 °C) approx. 3500 mPas

    The stated values represent typical product characteristics and are not to be construed as binding product specifications.

    Field of application

    • For use indoors and outdoors
    • for dimensionally stable elements
    • For professional users only
    • For use on interior and exterior wood
    • Soft and hard woods
    • Dimensionally stable wood building elements: e.g. windows and doors
    • Primer and intermediate coat


    • Water-based
    • Good flow properties
    • Good build on the surface
    • Good pore wetting performance
    • Excellent protection against discolouration caused by water-soluble substances contained in the wood
    • Excellent protection against surface defects caused by substances contained in specific types of wood (e.g. larch)
    • Very good adhesion to the substrate
    • Flexible tinting helps to provide the ideal colour match with final coats
    • Preparation
      • Substrate requirements

        The substrate must be clean, dry, free of dust, grease and loose substances, and prepared in the correct manner.

        Dimensionally stable wood building elements: wood moisture content 11-15%

      • Preparations

        If necessary, impregnate non-resistant woods with a wood preservative* (*Use biocides safely. Always read the label and product information before use).

        Prime wood surfaces.

        If necessary, protect parapet joints with Induline V-Joint Protection or Induline AF-920.

    • Application
      • Temperature of the material, air and substrate: from min. +15 °C to max. +30 °C
      • Stir before use
      • Airless/airmix spraying
      • Application requirements

        Temperature of the material, air and substrate: from +15 °C to +30 °C.

      • The values given are based on undiluted material. The best spraying pattern is achieved if the material has a temperature of 15-20 °C.

        If necessary, check compatibility with the substrate and sealing effect by applying a trial coat.

        Airless spraying: nozzle size: 0.28-0.33 mm; material pressure: 70-90 bar.

        Air-mix spraying: nozzle size: 0.28-0.33 mm; material pressure: 70-90 bar, atomiser air pressure 1-2 bar.

        After priming, carry out light intermediate sanding.

        Carry out intermediate sanding before applying a final coat: P 220-240, remove sanding dust.

        Seal opened containers well and use contents as soon as possible.

    • Application instructions
      • Drying time: can be worked over after 4 h
      • Check colour, adhesion and compatibility with the substrate by setting up a trial area.

        Before coating technically modified woods and wood-based materials, apply the coating to a trial surface and conduct a suitability test on the desired area of use.

        Ensure good ventilation.

        With water based coating systems, there is always a residual risk that substances contained in the wood will cause discoloration.

        Bleeding resin is a natural phenomenon and cannot be prevented by coating measures, see BFS Code of Practice No. 18.

        The product's sealing effect may be impaired if it is diluted too thinly, if the wood is too wet or if the recommended coating sequence, application volumes and drying times are not observed.

        Observe current standards and guidelines for coating wood building elements outdoors (Codes of Practice issued by the German Association of Window and Facade Manufacturers (VFF), Code of Practice No. 18 issued by the German Federal Committee for Paint and the Protection of Material Assets (BFS), guidelines issued by the German Lacquer and Printing Ink Association (VdL) and ift guidelines issued by the Institut für Fenstertechnik).

        The system finder on our website www.remmers.com contains coating recommendations for specific wood types to be used when treating windows and exterior doors.

      • Drying

        Dust dry: after approx. 30 mins Can be sanded and overcoated: after approx. 4 hours (at 23 °C and 50% RH) When forced drying is applied, can be sanded and overcoated: 20 mins flash-off time (at approx. 20 °C and 65-75% RH/75 mins drying time (approx. 45 °C, 1 m/s air circulation)/20 mins cooling time.

        Low temperatures, poor ventilation and high humidity delay drying.

      • Thinning

        If necessary with water (max. 5%).

    • Working tools / cleaning
      • Airless/airmix spraying
      • Hand spray guns, automatic spraying equipment.

      • Clean tools with water or Aqua RK-898 Cleaning Concentrate immediately after use.

        Ensure that any residue from cleaning is disposed of correctly.

    • Storage / shelf life
      • Store frost-free and cool / protect for moisture / close containers
      • Shelf-life 12 months
      • If stored unopened in its original container in a cool, dry place and protected against frost, the product will keep for at least 12 months.

    • Usage
      • Approx. 150 ml - 200 ml / m² per layer applied
      • 150-200 ml/m² per coat (corresponds to wet film thickness of 150-200 μm, dry film thickness of 60-85 μm)

    • General information
      • Sealing compounds must be compatible with the coating and may only be applied once the coating has dried thoroughly.

        Only use sealing profiles that are free of plasticisers.

        Wood building elements which have been treated with an intermediate coating should not be exposed to weathering until a finishing coat has been applied.


        Depending on the desired final colour (e.g. when using Induline DW-625), Induline ZW-425 can be used specifically in one of 4 basic colours. This allows the colour accuracy, colour brilliance, hiding power/clouding to be optimised. This is particularly important for colours from the yellow, red, orange and green colour spaces which are naturally less opaque. The classification below can be used to select a specific colour for the intermediate coat, depending on the colour of the finishing coat:
        RAL 1000-1037: FT42553 cream
        RAL 2000-2012: FT42553 cream
        RAL 3000-3031: FT42553 cream
        RAL 4001-4010: FT42554 light grey
        RAL 5000-5004, 5008, 5010-5011, 5013, 5020, 5022: FT42555 dark grey
        RAL 5005-5007, 5009, 5012, 5014-5019, 5021, 5023-5024: FT42554 light grey
        RAL 6000, RAL 6017-6019, 6021, 6024-6025, 6027, 6029-6034: standard white
        RAL 6001-6003, 6010-6011, 6016, 6026, 6028: FT42554 light grey
        RAL 6004 - 6009, 6012, 6014 - 6015, 6020, 6022: FT 42555 dark grey
        RAL 6013: RAL 7001 pigmentation
        RAL 7000-7013, 7023, 7030, 7033, 7036-7037, 7039-7043, 7045-7046: FT 42554 light grey
        RAL 7015-7022, 7024-7026, 7031: FT 42555 dark grey
        RAL 7032, 7034-7035, 7038, 7044, 7047: standard white
        RAL 8000-8008, 8023 - 8028: FT 42554 light grey
        RAL 8011-8022: FT 42555 dark grey
        RAL 9001-9003, 9010, 9016, 9018: standard white
        RAL 9004-9005, 9011, 9017: FT 42555 dark grey
        RAL 9006-9007: FT 42554 light grey

    • Disposal instructions
      • Larger quantities of leftover product should be disposed of in the original containers in accordance with the applicable regulations. Completely empty, clean containers should be recycled. Do not dispose of together with household waste. Do not allow to enter the sewage system. Do not empty into drains.

    • Safety / regulations
      • For further information on the safety aspects of transporting, storing and handling the product and on disposal and environmental matters, please see the current Safety Data Sheet.