Submitted by webmaster on 11 June 2024

Premix Plaster SF

Cementitious premixed plastering/rendering Material.

Premix Plaster SF is a cement based plastering material composed of hydraulic binders, natural sand, selected graded aggregates, special fibers, and special additives. It is supplied as a dry powder in bags/bulk ready to use on site, which requires only the addition of clean water to produce cohesive mortar. Premix Plaster SF is specially designed for application by spray machine and it can be used manually if required , and contains special shrinkage control additive and provides good adhesion with a uniform color surface. Premix Plaster SF can be applied at thicknesses ranging from 10mm to 25mm.

Uses

  • Internal & external plaster on block walls and rough surfaces. 
  • Plastering on fairfaced concrete and precast panels subsequent to Spatter Dash SB scratch coat.

Advantages

  • Fast mixing application using a spray machine. 
  • It contains a special additive that reduces friction and prolongs the lifespan of the equipment. 
  • Factory controlled pre-blend that ensures consistently high quality. 
  • Requires only the addition of water on-site at the time of usage. 
  • Uniform color/mass. 
  • Improved workability & curing. 
  • Easy application with uniform work flow enables high productivity & superior finishing. 
  • Strong adhesion on a variety of substrates. 
  • Internal & external applications. 
  • Shrinkage control reduces surface cracks. 
  • Suitable for humid & dry conditions.

Usage Instructions

The substrate should be sound, clean, free from loose material, grease, laitance, dirt curing compound, or any other substance that might impair the substrate’s quality of the bond. 

Before the Premix Plaster SF application, damp the entire surfaces with clean potable water. The substrate should be neutralized surface at the time of the Premix Plaster SF application.

Add to the mixing container 6.5 - 9 liters of water for each 50Kg bag of Premix Plaster SF. 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 achieving a uniform, lump-free consistency. 

For PFT plastering machine application, the water flow rate should be 350- 550 lit/hr, depending on the rubber pump’s status. Use the mixed material within 90 min. 

Do not add water to the mix once the mixed mortar starts to harden.

Apply Spatter Dash SB before the application of Premix Plaster SF.

Apply Premix Plaster SF in single or multiple layers on rough surfaces. On smooth surfaces, apply it after the application of a spatter dash coat. 

When the plaster starts to set, rod or level to a uniform thickness, then smoothen the material to the desired appearance. 

For multiple layers, follow the practice in ASTM C926, 10 - 15 mm/layer with a rough finish, curing for two days /layer before applying the second one. Finish the final layer as desired. 

After the surface appears stiff but still moist, smoothen the material’s surface to achieve the desired appearance.

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

Clean tools with water before the mortar hardens. After the hardening, remove the residuals mechanically.

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