Design Criteria

Plaster Cement Perlite is designed to be used at thicknesses between 10 - 30 mm in a layered application. The product can be applied on block walls without the need to use a scratch coat as long as the substrate is properly irrigated prior to application. In cases of fairfaced concrete; a scratch coat is needed to insure mechanical keying and enhanced bonding.

Mixing

Add to the mixing container 7-8 liters of water for each 25 Kg bag of Plaster Cement Perlite. Add the powder to the water and mix with a mechanical plaster mixer or low speed electric drill fitted with a suitable paddle for 3-4 minutes, until a uniform, lump-free consistency is achieved.
Do not add water to the mix once the mixed mortar start to harden.

Smooth Concrete Surfaces

Apply Spatter Dash SB prior to the application of Plaster Cement Perlite.

Application

Plaster Cement Perlite can be applied in a single or multiple layers on rough surfaces. On smooth surfaces it should be applied subsequent to the application of a spatter-dash coat. Rod or level to a uniform thickness immediately then follow smoothing the material to the desired appearance. For multiple layers allow the plaster to partially dry (60-120 minutes depending on weather). Apply second coat at thickness as described above to a desired appearance. After the surface appears stiff but still moist, follow the smoothing the material to achieve a desired appearance.

Curing

Plaster Cement Perlite is best cured by spraying water on its surface every 8-12 hrs for a minimum of 3 days. During hot & dry conditions allow curing for minimum of 5 days. It will help to obtain high mechanical strengths and minimize the risk of surface cracks.