Design Criteri

Premix Plaster S is designed to be used at thicknesses between 10 and 25mm in a single application. The product can be applied on block walls without the need to use a scratch coat as long as the substrate is properly soaked prior to application.

Mixing

Add to the mixing container 6.5 - 8.5 litres of water for each 50 Kg bag of Premix Plaster S. 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.
For application using plastering machine, the recommended water flow rate is 350 - 550 Ltr/hr depending of the status of the rubber pump.
Mixed material should be used within 90 min.
Do not add water to the mix once the mixed mortar starts to harden.

Smooth Concrete Surfaces

Apply Spatter Dash SB prior to the application of Premix Plaster S.

Application

Premix Plaster S can be applied in a single or multiple layers on rough or smooth surfaces using spray machine at thickness of 10 - 25 mm per layer. Apply a spatter dash coat on smooth surfaces.
Rod or level to uniform thickness of 10 - 25 mm.
When the plaster starts to set, smooth the material to a desired appearance.
For multiple layers follow the practice in ASTM C926, 10 - 15 mm/layer with a rough finish, with curing for two days /layer prior application the second one, the final layer to be finished as desired.
After the surface appears stiff but still moist, follow the smoothing the material to achieve a desired appearance.

Curing

Premix Plaster S is best cured by spraying water on the surfaces of applied materials every 8-12 hrs for 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.