Lascaux Mediums & Additives

Lascaux Mediums & Additives

Lascaux Mediums & Additives includes the following products:

Lascaux Medium 1 gloss
Lascaux Medium 1 Anwendung Lascaux Medium 1
Lascaux Medium 1 dries to yield a water-resistant glossy and crystal clear finish. Added to Lascaux acrylic colours it increases transparency and yield. It also serves as a varnish for works on flexible substrates. 
  • water-resistant, colourless and crystal clear
  • lightfast and age-resistant
  • increases transparency and yield
  • first-grade primer for smooth surfaces
  • water-dilutable
Use & application:
  • for glazes and as a sealer for concrete surfaces 
  • collages and embedding of various materials
  • suitable for flexible substrates 
  • as a sealer (dilute 1:1 to 1:10 with water)
  • as a glossy varnish (dilute 4:1 with water)
Lascaux Medium 2 matt
Lascaux Medium 2 Anwendung Lascaux Medium 2
Lascaux Medium 2 dries to yield a water-resistant matt finish. Added to Lascaux acrylic colours it increases their mattness level and yield.
  • water-resistant, colourless and clear
  • lightfast and age-resistant
  • increases mattness levels and yield
  • optimal adhesion properties
  • water-dilutable
Use & application:
  • for glazes and as a sealer for concrete surfaces 
  • collages and embedding of various materials
  • suitable for flexible substrates 
  • as colourless sizing for paper and canvas
  • as a colourless primer (dilute 4:1with water)
Lascaux Medium 3 satin
Lascaux Medium 3 Anwendung Lascaux Medium 3
Lascaux Medium 3 dries to yield a water-resistant satin finish. Added to Lascaux acrylic colours it increases yield. It also serves as a satin varnish for works on flexible substrates. 
  • water-resistant, colourless and clear
  • lightfast and age-resistant
  • increases yield
  • optimal adhesion properties
  • water-dilutable
Use & application:
  • for glazes and as a sealer for concrete surfaces 
  • for collages and embedding of various materials
  • suitable for flexible substrates 
  • as a sealer
  • as sizing for paper and canvas
  • as colourless varnish (add 25% water)
Lascaux Sirius® Acrylic Medium matt
Lascaux Sirius Acrylic Medium Anwendung Lascaux Sirius Acrylic Medium

The painting medium for Sirius® Primary acrylic colours dries to yield a water-resistant, deep matt finish. It is the mattest of all Lascaux mediums. 

  • increases yield
  • water-resistant, colourless, matt
  • lightfast and age-resistant
  • optimal adhesion properties
  • improves the brushability of diluted colours
  • does not affect gloss levels when added to Sirius acrylic colours

Use & application:

  • as a medium for Sirius acrylic colours
  • as a deep matt medium for all acrylic colours 
Lascaux Aquacryl™ Medium
Lascaux Aquacryl Medium Anwendung Lascaux Aquacryl Medium

Painting medium for Lascaux Aquacryl™ colours which dries to yield a water-soluble matt and transparent finish.

  • increases yield
  • colourless and transparent
  • dries to yield a water-soluble matt finish
  • lightfast and age-resistant
  • optimal adhesion properties
  • does not affect gloss levels when added to Aquacryl colours
Use & application:
  • as a medium for Lascaux Aquacryl, Sirius watercolour and Gouache
  • solubility and mattness of colour remain unaffected
Lascaux Glazing Medium
Lascaux Lasurmedium
Extends open time, allowing for more flexibility in the creative process.
Adding Glazing Medium enhances the transparency of colours without affecting their luminance.
  • transparent
  • lightfast
  • water-resistant, matt finish
Lascaux Pouring Medium
Lascaux Pouring Medium

Lascaux Pouring Medium provides a crystal clear, glossy and scratch-resistant surface. Added to acrylic colours it increases adhesion and resistance.

Guide to fluid painting (pdf)

  • colourless, water-resistant when dry
  • highly transparent
  • elastic yet hard, glossy film
  • non-foaming
  • age- and weather-resistant
  • lightfast and non-yellowing
  • very high binder content
  • very good adhesion, abrasion resistance and hardness
Lascaux Retarder
Lascaux Retarder
Added to acrylics Lascaux Retarder extends open time without altering the quality or the aspect of the colour. Not suited for works on absorbent substrates or outdoor use. 
  • doubles open time
  • does not affect the quality and aspect of colours
  • only minimal changes to viscosity
  • lightfast and age-resistant
  • pastose and very economical
Use & application:
  • as an additive to acrylic colours on non-absorbent substrates 
  • only for indoor use
Lascaux Retarder Ultra
Lascaux Retarder Ultra

Added to acrylics Lascaux Retarder Ultra extends open time sixfold without altering the quality or the aspect of colours.* Not suited for works on absorbent substrates or outdoor use.


  • extends open time sixfold
  • does not affect quality and aspect of the colour
  • only minimal changes to viscosity
  • lightfast and age-resistant
  • pastose and very economical


Use & application:
  • as an addition to acrylic colours on non-absorbent substrates 
  • only for indoor use
*Warning: H319, EUH208.
Lascaux Thickener
Lascaux Verdicker
Lascaux Thickener increases consistency and viscosity of highly diluted colours, and preserves spreadability.* The thickening effect is displayed only in wet colours. 
  • increases viscosity of acrylic colours
  • conserves the water balance of colours and extends  open time
  • ensures good brushability for glazes with highly diluted colours and prevents trickling
  • colour depth and surface remain unaltered
Use & application:
  • for thickening highly diluted colours
  • only for indoor use
*Danger: H318, EUH208.
Lascaux Matting Agent
Lascaux Mattierungsmittel
Adding Lascaux Matting Agent to acrylic colours will increase their mattness level and covering power, similar to gouache or tempera colours. 
  • increases mattness and opacity
  • dries to form a matt and water-soluble film
  • lightfast and age-resistant
  • free of binders
Use & application:
  • acrylic colours and mediums
  • for aqueous systems only
  • only for indoor use
Lascaux Acrylic Emulsion D 498-M
Lascaux Acrylic Emulsion D-498-M
Lascaux Acrylic Emulsion D 498-M is a bonding agent designed for creating acrylic colours, primers, fillers and modelling pastes. 
  • colourless,
  • dries to yield a transparent, water-resistant finish 
  • lightfast, age- and weather-resistant
  • very good adhesion properties
Use & application:
  • for the preparation ofacrylic colours, primers, fillers and modelling pastes
  • as an adhesive for various materials
  • for embeddings (mixed with chalk or quartz powder)
Lascaux Water Resoluble Medium
Lascaux Water Resoluble Medium
Lascaux Water Resoluble Medium is a bonding agent designed for creating water-soluble colours such as gouache or watercolours.* It dries to yield a water-soluble and matt finish and can also be used as a painting medium for Lascaux Aquacryl and Gouache. 
  • increases yield
  • colourless
  • dries to form a water-soluble and matt finish
  • lightfast and age-resistant
  • improves the brushability of diluted colours
  • does not alter gloss levels when added to Lascaux Aquacryl or Gouache
Use & application:
  • as a binder for the preparation of water-soluble colours
  • as a medium for gouache and watercolours
  • for retouching
*Warning: H319, EUH208
The viscous, transparent Lascaux mediums allow changing gloss levels as well as increasing the transparency and yield of colours.
Lascaux mediums increase transparency of colours, and they increase the adhesion and film strength of strongly diluted colours. They also improve spreadability. Hue and viscosity remain unaltered. All Lascaux mediums contain pure acrylic dispersion and are therefore extremely lightfast and age-resistant. Lascaux additives increase the scope of colours. 
Product information (pdf)
Lascaux Mediums leaflet
Lascaux Additives leaflet 
Lascaux binders and Acrylic Adhesive leaflet