PermaRock SiliconeUltra
K & R Finishes

PermaRock SiliconeUltra K & R Finishes represent the state-of-the-art in external through-colour renders. 


Based on a hybrid binder system of organically crosslinked nano-quartz particles and silicone emulsion, SiliconeUltra K & R Finishes offer a class-leading self-cleansing effect with enhanced resistance to dirt pick-up, providing cleaner surfaces for longer than conventional silicone, acrylic or mineral renders and can also help minimise costs associated with dealing with surface discolouration over the life of the building.

They are lightweight, water repellent, have excellent water vapour permeability and can resist aggressive air pollutants. Photo-catalytic particles help actively break down dirt particles which can be washed from the surface under normal weathering. These low environmental impact renders also contain a preservative against coating deterioration due to algae and fungus.

Available in an extensive range of colours from the PermaRock A1 Colour Range, PermaRock SiliconeUltra K & R Finishes are available with a K (stippled) texture, in 1.5, 2.0 and 3.0 mm grain sizes, or with an R (corrugated) texture with 2.0 and 3.0 mm grain sizes. Darker colours (Lightness Factor <20) are unsuitable for use with EPS / Phenolic insulation systems. 

Where utilised on Mineral Fibre insulation systems or PermaRock / PermaRend render systems, these darker shades may also require an additional coat of PermaRock SiliconeUltra Façade Coating.

PermaRock Façade A1 Colour Range

Our Façade A1 colour range provides 500 colour shades with the highest colour brilliance and more permanent colour stability. Formulated entirely with inorganic pigments, the colour range is designed to complement PermaRock’s SiliconeUltra through-coloured renders which employ unique binder combinations. 

Learn about the key benefits of the A1 range 

Method of Application

Supplied pre-tinted to the required colour, PermaRock SiliconeUltra K & R Finishes are ready to use and are applied onto the prepared surface by stainless steel trowel or using spray equipment. The applied finish is then rubbed-up and textured with a plastic float to the grain size.

For SiliconeUltra R Finish, the method of texturing allows the creation of linear (vertical, horizontal or diagonal) or non-linear (circular, swirling) patterns in the finished surface.

Application / Drying Conditions

Temperature (material, substrate and ambient) during application and drying : +5 ºC to + 30 ºC. Application should not take place in direct sunlight, during strong wind, fog, high relative humidity or when imminent rain or frost is expected. The material dries by water evaporation and film formation.

Drying time: at 20 ºC and 65% RR: Surface dry after approx. 24 hours. Cured, recoatable and ready for stress after 2 - 3 days.


PermaRock K & R Primer is supplied, pre-tinted to the required colour, in 25 kg plastic pails.

PermaRock SiliconeUltra K & R Finishes are supplied pre-tinted to the chosen colour in 20 kg plastic pails.

Available Colour / Texture / Grain Size