Mineral paint was invented in 1878 by Bavarian scientist, Adolf Wilheim Keim, and granted a royal patent. Today, Keim are the world leading specialists in mineral paints and are at the forefront of development to improve the properties of paint itself and increase the spectrum of naturally-sourced colours.

Liz Michael chose to work with Keim for the simple reason that they are the pioneers of mineral paint and produce the highest quality products. Tradition and innovation makes Keim unique as a company and their heritage speaks for itself.  Liz wanted a pure product, but also with the colour depth and vibrancy only achieved with a mineral paint.

Mineral paints are comprised of potassium silicate (or water glass) and natural earth oxide pigments. They contain neither solvents nor petrochemical derivatives, do not give off toxic gases and are incombustible.

Mineral or sol-silicate paints as they’re technically called, chemically react with the underlying surface, forming a permanent bond through the process of silification. The addition of silica sol enhances the adhesion of mineral paints and increases their scope to include application onto previously painted mineral surfaces.

Emulsions and acrylic paints differ as they effectively only adhere to the surface.  Film-forming coatings can trap moisture and eventually flake from the surface, whereas the microporous structure of mineral paint permits the passage of moisture vapour whilst preventing water from entering the substrate. This triples the paint’s anticipated lifespan.

Mineral paints have a completely matte finish, however the micro-crystalline structure provides high light reflectance and colour luminosity, giving a bright and clean appearance. The ultraviolet stability of earth oxide pigments results in no colour fade over time, proved by examples over 100-years-old.

Gris Mineral Paints are produced exclusively by Keim Mineral Paints Ltd, UK. They are natureplus certified. Made to order.

  • Description

    A ready to use sol-silicate interior paint with earth oxide colour pigments giving intense light fast colour shades. Suitable for use on previously painted and unpainted surfaces. Not suitable for wood, metal or plastic. Flat matte colour which is breathable with a high moisture vapour permeability. Acrylic and preservative free. Resistant to mould and mildew. Non flammable. Environmentally friendly. Cruelty free. natureplus certified.

    Gris Mineral Paints are different from conventional paints. They contain potassium silicate and chemically bond to the underlying substrate rather than simply forming a film on the surface. They are water based, rather than solvent based, therefore odourless and safe to use.

  • Coverage & VOC Content

    Coverage 0.22L per m²
    VOC content 0-1g/L
    SD Value 0.01

  • Preparation

    Any loose, flaking and unstable material must be identified and then thoroughly removed using stiff brushes and broad bladed scrapers to get back to a sound edge.  The edges should then be feathered in.

    Ensure that any paint materials left remaining and the underlying substrate is sound and adhering well.

    Gloss or shiny surfaces should be thoroughly flattened down using sand paper.

    Newly rendered/repaired surfaces require a minimum period of 15 days to dry.

    Newly lime rendered/repaired surfaces require a minimum of 28 days to dry.

  • Repairs

    Any cracks should be filled with a mineral based filler.  Acrylic, silicone or polymer fillers are imcompatible with mineral paint.

    We recommend Keim Dolomitspachtel available from keimpaintshop.co.uk

    Dampen surfaces with a sponge or cloth using clean cold water.  Apply Keim Dolomitspachtel by brush or trowel.  Allow a minimum of 15 days to dry before sanding smooth and remove surface dust using a soft cloth.

    Apply a single coat of Gris Mineral Paint with a roller, (brush for corners) or airless spray.

    A minimum of 12 hrs must be observed before applying the final coat.

  • Application

    Materials must NOT be applied where ambient and surface temperatures below 5°C or in excess of 30°C. Containers should be stored in a cool, dry area protected from frost.

    Surfaces must be clean and dry with below 18% moisture content.

    Roller application is preferable with brush application for corners. Airless spraying also suitable. If using airless spraying, contact us for details of the appropriate nozzle sizes and optimum mesh and filter types.

    Mineral paints are manufactured using natural components and as such can appear to dry out unevenly. Once fully dried, any unevenness will disappear. Do NOT over-roll or touch up the paint during the drying process as this may inadvertently create textural discrepancies when dry. Always maintain a wet-edge throughout the application and work from the corner to a natural break line. Do NOT cut in.

    Mineral paints will lighten as they dry with a corresponding increase in opacity. It is essential to wait a minimum of 12 hours after the first coat to ensure adhesion. Always apply 2 coats

  • Porosity & Absorbance

    It is important to establish how porous the substrate is to ascertain whether priming maybe requires to equalise absorbance. Tests can be done using clean cold water in a spray bottle. Long water runners indicate low absorbency, whereas short thick runners show high absorbency and would require priming. Use Keim Granital Dilution to prime bare surfaces 12 hours prior to painting. Highly absorbent surfaces can have an adverse effect on potassium silicate within the paint and can lead to chalkiness, uneven colour and reduced product performance.

  • Adhesion on painted surfaces

    To conduct an adhesion test on previously painted surfaces, cut small lines through the existing paint with a sharp blade. Press adhesive tape firmly across the cuts and then firmly pull off the tape. Paint which lifts from the surface is unsound and should be removed . Repeat at random in a number of areas to test the surface.

  • Paint Disposal

    Do not empty into drains. Unused paint may be left to dry to a solid form and disposed of according to official regulations. Mineral paint is biodegradable.

  • Recycling

    Our containers are made from 100% recycled plastic. Recycle in compliance with local regulations.

  • Other Questions
    We have taken care to ensure that specifications are accurate, if there is any doubt about how to deal with a specific problem, please contact us: info@grispaints.co.uk  or 020 3951 0559.