Uniprotect Data Sheet & Application Notes for St Astier Natural Lime Paints

UNIPROTECT is a protection coating applicable externally or internally on surfaces as concrete, stone, bricks, clay terracotta, lime renders, gypsum (see note). UNIPROTECT is clear and will not affect paint colours It is studied to provide protection against chemical, physical and biological agents such as acid rain, frost, bio growth and dirt. It will also increase the resistance of lime paint coatings against adverse weather conditions.

General Properties

Physical Properties

Density @ 20oC

Viscosity @ 20oC

Drying time

Indicative Coverage



1025 – 1050kg/m3

300 – 400 MPa

15 to 60 minutes

5 to 10 m2 per Litre

12.5 Litres containers

Frost free


Restoration and conservation. If painting directly on stone or bricks apply a first coat of lime paint (white or pigmented) as normal on well prepared surfaces which have been dampened enough to avoid high suction.

The second coat is applied about 24 hours later in one or two passes and will consist of the normal lime paint mix (pigmented or not) with an addition of 0.5 litres of UNIPROTECT for every 3 litres of water used.

For additional protection, in extremely exposed areas, apply a third coat with Uniprotect or only UNIPROTECT by brush, roller or spray.

NOTE: do not use UNIPROTECT on gypsum plasters or gypsum/lime plaster unless in accordance with the method described above.

New Build

On cement, blocks or dense backgrounds with little suction, apply UNIPROTECT with a first coat of white lime paint (0.5 litres for every 3 litres of water used). Application with rollers or brushes: preferably use a brush or a low pressure spray gun (3.5 bar) for uneven or rough surfaces. Rollers for smooth surfaces. Clean and dampen the background adequately to control suction. Apply the first coat whilst background is still damp.

Second and, if required, third coat as per Restoration and Conservation method.


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For further Guidance, contact your St Astier Distributor.
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