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The latest information on ROCKCOTE products; tips and hints on application; case studies and projects.

Need a high build polymer render?

ROCKCOTE’s Polymer Render Grey performs extremely well over dense and difficult substrates and has been formulated to provide builds of up to 4mm per coat.

Polymer Render Grey will not drag and can be trowelled on to the surface in one or two applications then floated/sponged straight away.

The finished product closely matches the appearance of sponge finished ROCKCOTE Quick Render and provides a stable flat or sponged finish surface ready for top coating with texture or membrane coating.

Arcylic Based Polymer Renders

ROCKCOTE Polymer Renders are pre-mixed, 100% acrylic based renders designed to be flexible and lightweight.

ROCKCOTE’s Polymer Renders are especially suitable for application over fibre cement and painted substrates where tolerance to movement and good adhesion must be considered.

Each render is composed of specially selected graded quartz sand with a pure acrylic binder system and other proprietary additives. ROCKCOTE Polymer Renders are highly crack-resistant and can be used in interior and exterior applications.

Uses:

  • Suitable for application over properly prepared substrates such as brick, block, ROCKCOTE render, concrete, fibre cement sheeting, A.A.C. panels/blocks and plasterboard.

Overcoating:

  • Must be overcoated with a minimum ROCKCOTE Coloured Render or ROCKCOTE Armour membrane paint.

Polymer Render Grey: a high-build polymer render which can provide a build out coat of up to 4mm. Can be trowelled then floated/sponged straight away at 1-2mm. High in volume solids, displays minimal shrinkage and has excellent crack-bridging properties.

Polymer Render Off White: ROCKCOTE’s original, premium polymer render that is easy to apply and finish. Best applied in coats of 1-1.5mm.

Polymer Render Fine: comprised of finer sands that can create a finer finish and aesthetic.

Acrylic Base Coat Render: a high-build polymer render which can provide a build out coat of up to 4mm. Can be trowelled then floated/sponged straight away at 1-2mm. High in volume solids, displays minimal shrinkage and has excellent crack-bridging properties.

ROCKCOTE Polymer Renders Comparison Table
ProductPurposeColourKey FeaturesSand ProfileTypical Coating ThicknessSet TimeCure TimeTools
Polymer Render GreyTDS >Fibre cement sheet / AAC PanelGrey
  • Can be trowelled then float/sponged straight away at 1-2mm build
  • Overcomes shrinkage in cement render
  • Excellent crack-bridging properties
Medium1-2mm; can be built out up to 4mm3 hours (1mm application)24 hours (1 mm application)Screed, Trowel or Sponge
Polymer Render Off WhiteTDS >Fibre cement sheet / AAC PanelOff White
  • Easy to apply and finish
  • Flexible
  • Highly crack resistant
Medium1mm3 hours (1mm application)24 hours (1 mm application)Screed, Trowel or Sponge
Polymer Render FineTDS >Fibre cement sheet / AAC PanelOff White
  • Easy to apply and finish
  • Flexible
  • Highly crack resistant
Fine1mm3 hours (1mm application)24 hours (1 mm application)Screed, Trowel or Sponge