Article No. 724001

MSL-40/sm Medium Build Stain UV+

Decorative, solvent-based medium build stain with very high UV protection and film preserver for universal use on exterior wood

Colour: clear UV+ | 7240
Colour: clear UV+ | 7240
Please choose a colour

Product specifications

On delivery

Binder Alkyd resins
Density (20°C) Approx. 0.94 g/cm³
Odour Solvent-like, characteristic once dry
Degree of gloss Silk matt
Runout time s (20° C, DIN 4) 48 s

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

Field of application

  • For use outdoors
  • for dimensionally stable elements
  • for elements with limited dimensional stability
  • for not dimensionally stable elements
  • For professional users only
  • For use on exterior wood
  • Dimensionally stable wood building elements: e.g. windows and doors (including their interior surfaces)
  • Wood building elements with limited dimensional stability, e.g. folding shutters, matchboarding, summerhouses
  • Wood building elements with no dimensional stability: e.g. fences, framework, carports, planking
  • Clear UV+ can also be used as a sacrificial layer over pigmented variants to prevent the wood from darkening
  • For use by professionals


  • Solvent-based
  • Non-drip
  • Good flow properties
  • Film preserver protects against mould and algae
  • Weather-resistant and UV-resistant
  • High UV protection thanks to special binder
  • Dirt-repellent and easy to maintain
  • Block resistant (in accordance with Code of Practice HO.03)
  • Cobalt-free
  • Preparation
    • Substrate requirements

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

      Wood building elements with limited or no dimensional stability: wood moisture content max. 18%

    • Preparations

      Thoroughly remove any dirt, grease and non-adhering old coatings.

      Thoroughly sand any old coatings that are still intact.

      Sand grey and weathered wood surfaces down to sound, bright wood.

      If necessary, the substrate can be made more uniform with Aqua RG-27.

      Remove any loose and torn knots as well as resin that bleeds from the wood and clean with a suitable product (e.g. V 101 Thinner).

      Exterior wood that is to be protected against rot and blue stain and/or wood-destroying insects should be pre-treated with a suitable wood preservative* [see system products]. (*Use biocides safely. Always read the label and product information before use.)

      When painting exterior wood with the colour Clear UV+, the wood must first be pre-treated with Wood Protection Cream Clear.

      Observe BFS Code of Practice No. 18 "Coatings on Wood and Wooden Working Materials in Outdoor Areas".

  • Application
    • Application temperature: min. 5 °C max. 30 °C
    • Stir before use
    • Brush
    • Application requirements

      Temperature of the material, air and substrate: from min. +5°C to max. +30 °C

    • Stir well and apply quickly using a brush.

      Apply in the direction of the grain.

      Carry out light intermediate sanding on particularly elegant surfaces prior to applying a finishing coat.

      Apply a second coat once the first has dried.

      If required, Clear UV+ can be used as a third coat to permanently fix the desired colour (sacrificial layer that is renewed when renovating).

      The procedure can also be used on surfaces that have been pre-treated with HSL-30/m* or Wood Cream*.

      This procedure is not advisable on substrates that have been treated with white products (darkening, yellow tint from Clear UV+).

      End grain areas should be painted over with several coats of the material in the corresponding colour to protect against water absorption.

      Windows and exterior doors require 3 coats.

      All colours can be mixed with one another.

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

  • Application instructions
    • Drying time: can be worked over after 12 h
    • Check colour and compatibility with the substrate by applying a trial coat.

      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.

      Make sure that the area is well ventilated during processing and drying.

      Each layer of medium-build stain results in a more intense colour and a glossier finish.

      Compatible with plastics and bituminous materials once dry.

      Areas that are being coated or dried should be protected against rain, wind, sunlight and condensation.


      Mechanical damages, especially to clear coatings, must be immediatly repaired with "clear UV+" to prevent discolouring, caused e.g. by blue stain.

      Risk of self-ignition (DGUV information brochure 209-046).

      The product should not be applied at the same work stand as NC-based varnishes or stains. Collect any textiles soiled with the product (e.g. cleaning rags, work clothing) in fire-resistant waste containers and dispose of properly.

    • Drying

      After approx. 12 hours at 20 °C and 65% relative humidity

      Low temperatures, poor ventilation and high humidity delay drying.

    • Thinning

      Ready to use

  • Working tools / cleaning
    • Brush
    • Paintbrush with natural bristles, flat brush

    • Clean tools immediately after use with V 101 Thinner.
      Dispose of the remains from cleaning properly.

  • Storage / shelf life
    • Store frost-free and cool / protect for moisture / close containers
    • At least 36 months in unopened, original containers stored cool, dry and protected from frost.

      Use the contents of open containers as quickly as possible.

  • Usage
    • Approx. 60 ml - 100 ml / m² per layer applied
    • 1st coat: 100 ml/m²
      2nd coat: 60 ml/m²

  • General information
    • On planed larch and softwoods with a high resin content, the coating may have reduced adhesion and resistance to weathering. This is especially the case on horizontal year rings, knots and areas of winter growth that are high in resin. Maintenance and renovation must be carried out more frequently on these surfaces.
      The only remedy for this is pre-weathering or very coarse sanding (P80).
      If these wood types are rough-sawn, considerably longer maintenance and renovation intervals are to be expected.

  • 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.