UNDER COAT RENDER FOR SKIM COAT

Sample of the surface that need to be rendered before applying skim coat

Before applying skim coat to RC wall or brick/block wall, the surface must be rendered,

Materials to be used for rendering surface before applying skim coat are:-

1.Thin plaster

Poduct Name	QuickMix ™ Thin Plaster (386)
Appearance	Grey
Packaging	1 bag @ 40kg
Binder	OPC
Filler Materials	Graded Silica sand and limestone
Auxilaries	Additives to enhance workability, water retention and adhesion
Water powder ratio	0.21 – 0.23
Wet Density	1800 – 1900 kg/m3
Dry Density	1600 – 1700 kg/m3
Bond strength	Above 0.5N/mm2
Recommended thickness	Max 5mm/layer
Coverage	Approximately 0.55m2/kg (1mm  thick)
Surface preparation	1.Clean from dust, oil and any foreign materials. 2.Substrate defect to be patched before plastering 3.Moisten surface with water prior to application  (for dry/high absorbing substrate) 4.Avoid stagnant/frequent water flow on sbustrate  prior to plastering to prevent poor adhesion`
Mixing	1 bag mix with 8.5litres of water Mix thoroughly with electrical mixer fo 3-5min. Mixture must be homogenous, free from lump Remix for 1 minute if left unused for more than 30min.
Tool to apply	Steel trowel
Layers	If application requires a few layers, the underneath layers must be dry before applying the subsequent layers
Storage	Dry place free from excessive moisture
Shelf life	6 months in its original packing
Suitablity	1.Spatterdash coat on concrete surface 2.Undercoat for all type of blockwalls 3.interior and exterior
Not to be used on	Painted surface

2.Thick Plaster

Poduct Name	QuickRender ™  (387)
Manufacturer	Lafarge
Appearance	Grey
Packaging	1 bag @ 40kg
Binder	OPC
Filler Materials	Graded Silica sand and limestone
Auxilaries	Additives to enhance workability, water retention and adhesion
Water powder ratio	0.20 – 0.22
Wet Density	1850 – 1950 kg/m3
Dry Density	1700 – 1800 kg/m3
Bond strength	Above 0.5N/mm2
Recommended thickness	Max 10mm/layer
Coverage	Approximately 0.55m2/kg (1mm  thick)
Surface preparation	1.Clean from dust, oil and any foreign materials. 2.Substrate defect to be patched before plastering 3.Moisten surface with water prior to application  (for dry/high absorbing substrate) 4.Avoid stagnant/frequent water flow on sbustrate  prior to plastering to prevent poor adhesion`
Mixing	1 bag mix with 8.5litres of water Mix thoroughly with electrical mixer fo 3-5min. Mixture must be homogenous, free from lump Remix for 1 minute if left unused for more than 30min.
Tool to apply	Steel trowel
Layers	If application requires a few layers, the underneath layers must be dry before applying the subsequent layers
Storage	Dry place free from excessive moisture
Shelf life	6 months in its original packing
Suitablity	1.Surface improvement on cement rendered surface 2. Spatterdash coat on concrete surface 3.interior and exterior
Not to be used on	Painted surface
Special properties	1.Wter retention 2.Adhesion strength