Hempcrete Construction Materials

Pre-mixed breathable lime plaster

What is hempPLAST?

Hempcrete Construction Materials

hempPLAST is a breathable lime plaster & mortar. It is waterproof and allows moisture to easily flow through the surface, reducing condensation, mould and mildew.

Why use Afrimat Hemp lime-based vapour permeable plaster?

  • Suitable as plaster for hemp and heritage construction because of its compatibility and vapour permeable nature to these sectors.
  • Locally sourced sand and hemp.
  • Just add water – saves mixing time.
  • Better consistency than site mix plasters.
  • Best results when used with AFRIMAT HEMP block and hempcrete product range.

How to use Afrimat Hemp hempPLAST

This product can also be used with our Hemp building system
Hempcrete Construction Materials

AFRIMAT HEMP hempPLAST is specially formulated to prepare quality lime-based plaster without any specialist knowledge.

Add clean water to get the desired workability.

Avoid applying plaster at temperatures below 5°C.

Mix dry materials before adding water.

For construction in winter, ensure sufficient protection against rain and cold weather of brickwork and plaster.

Protect from direct rain and wind.


  • For plasters, a 'push-on' or 'throw-on' method can be used depending on the artisan's skill.
  • hempPLAST should be applied in two coats. The first scratch coat should be applied (10-15mm) and left for a week to carbonate. The second coat should be applied in a layer thinner than the first between (5-7mm) thick.
  • Floating must be done after bleeding water has disappeared, and the surface becomes firm
  • Wall finish can be oated or sponged.


  • Enhanced insulation performance.
  • AFRIMAT HEMP hempPLAST is a blend of CLC SABS 523 air lime and selected natural sand, allowing maximum vapour permeability.
  • The product has great durability, bond strength and elasticity.
  • hempPLAST absorbs atmospheric CO2 while setting.
  • hempPLAST are less prone to shrinkage cracking seen normally in conventional plasters.


  • Contact with lime-based paint may cause irritation or skin damage.
  • Wear suitable protective clothing, gloves, mask, and eye protection.
  • In case of contact with eyes, rinse immediately with water and seek medical attention if necessary.
  • After contact with skin, wash immediately with water and seek medical attention if necessary.
  • Keep out of reach of children.
  • Material safety data sheet available on request.
  • Not to be used as putty plaster.


  • Store in a cool, dry place out of direct sunlight.
  • Store out of reach of children.

CAUTION: hempPLAST contains lime

  • Wear safety gloves.
  • Wear safety goggles.
  • Wear protective clothing.
  • Wear safety mask.
  • Coverage 1m²/ 25kg at 15mm thick.
  • Keep out of reach of children.
  • Seek medical attention if necessary


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