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 because they are the pioneers of mineral paint. They have an unparalleled level of expertise and technical know-how.
Mineral paint is uncompromising in both beauty and integrity, historic and contemporary. Made from potassium silicate and coloured with natural earth oxide pigments. It is free of solvents and petrochemical derivatives and does not give off toxic gases. Mineral paints are naturally resistant to mould and fungal growth. Instead of creating a film over the surfaces like conventional coatings, mineral paints chemically react with the under-lying surface forming a permanent bond with the substrate itself. This micro-crystalline bond is the key to the breathability and durability of the paints.
Breathable coatings are vital to the health of a building and its occupants. Paints with high water vapour permeability enable humidity contained in building structures to be quickly released unhindered into the environment, avoiding moisture build up between coating and substrate. This permeability allows moisture to breathe through the coating and helps to protect building structures from the damaging effects of moisture build up. By contrast acrylic paints and emulsions create a synthetic barrier which traps moisture behind the coating, often causing paint to blister and flake over time.
Natural earth oxide pigments makes Gris mineral paints completely UV and colour stable. There is no colour fade of mineral paint with the passage of time – this is proven by buildings that were painted over 100 years ago where there is still no discernible colour fade, as well as no breakdown of the coating itself. UV can be incredibly damaging as it attacks and deteriorates the binder of conventional acrylic emulsions causing white pigments to yellow and discolour. Gris mineral paints are resistant to UV light so the coating remains intact and colour fast.
Gris paints are completely matte but the crystalline structure provides incredible light reflectance. Colours are intensified thanks to the high-level of luminosity achieved by light reflectance. Light is able to bounce/reflect off the microscopic surfaces of the crystalline finish. This reflection, or scattering of light, makes colours appear much richer, brighter and more luminous than conventional paints. This allows high light reflectivity which in internal spaces can maximise natural light.
The durable, colour stability and breathable qualities of mineral paint result in long-lasting coating which is enhanced by the timeless aesthetic of a monochrome palette.
Gris paints are produced exclusively by Keim Mineral Paints in the UK. They are natureplus certified. Made to order.
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
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.
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.
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.
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.
Our containers are made from 100% recycled plastic. Recycle in compliance with local regulations.
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: firstname.lastname@example.org or 020 3130 0294