Direct Coat Plaster

Next >>

Product Code : GP1

Product Specification

Single Substitute to Cement Sand Plasters and Plaster of Paris

Direct coat is specially formulated gypsum plaster, which can be hand applied over normal bare brick walls, hollow concrete blocks, columns, R.C.C ceiling and solid backgrounds, in single application in normal thickness. Good surface finish and could impact strength are its unique properties. Direct coat plaster is premix single application plaster made from calcium sulphate hemi hydrate to which additives have been added to improve workability. This light weight plaster is manufactured in an automatic continues flow kettle under a controlled temperature. This range of plaster comprises: Direct Coal and Direct Coat Supreme. They are recommended to be used depending upon the type of background.

The Advantages:

Pre Mixed Plaster
Lightweight
Single Application Plaster
Total Strength on Drying
Easy Workability
Excellent Bonding
No Shrinkage Cracks
No Water Curing
Economical
Non Combustible as per BS:476:Part 4:1970
Thermal Resistance is R = 0.07 m 2K/W at 13mm thickness

Technical Specification:

	Direct Coat	Direct Coat Supreme
Colour of Finished Surface	Brownish White	Off White
Bulk Density (kg/m3)	700	650
Compact Density (kg/m3)	1150	1050
Setting Time (Minutes)	25 Ã‚Â¬35	30 Ã‚Â¬35
Coverage at 13mm thickness (m2/1000 kgs)	62	65
Surface Smoothness	Smooth	Very Smooth
Workability	Easy	Easier
Compressive Strength (kg/cm2)	65Ã‚Â¬70	Ã‚Â¬ 80

Application:

Plasters are applied using hawk and trowel method as per recommended practice, where the thickness in one should not exceed 13 mm. plasters can be applied on most existing surfaces. This suitability of particular background for plastering should be considered in relation to its strength, suction, bonding properties, shrinkage or thermal movement characteristics, water and soluble salt content.

Thickness

Recommended thickness for Direct Coat plaster should be 12 to 15 mm and for Stucco plaster should be 6 to 8 mm. However, for higher thickness, plaster can be applied in more than one application.

Fixtures

Once the plaster has set, you can put up fixtures of varying weights. Smaller ones can be supported by using steel hooks and pins, while heavier frames and objects can be accommodated with plugs and screws, or suitable fixtures, adequately penetrated into the background to ensure a firm hold.

Maintenance:

Virtually no maintenance is required after the application of plaster.

Precautions

During application of plasters in hot and dry conditions, care should be taken to ensure that rapid loss of water is avoided. The plasters set to their full strength, provided water is mixed to the plasters in a specified ratio. If the water dries off too rapidly, then the strength of plaster will be impaired.

Packaging and Storage

Plasters are supplied in 20 kg & 25 kg HDPE laminated bags which have a shelf life of 3 months. Consignments should be used in strict rotation. To facilitate this, each bag is marked with the batch no. and date of manufacture. The bags should be stored in dry conditions.

Site Work:

Bag should be handled carefully to avoid tearing, - hooks are not recommended.
Prior to plastering, tubular service conduits should be chased into the background.
The background should be thoroughly brushed to remove dust and loose mortar.
All surfaces due for plastering should be dry, protected from the weather, and wetted 5 to 10 minutes prior to plastering, for the plaster to get a proper bonding on the background.
Ensure that hands are dry before putting them in the bag.
After taking out the required amount of plaster, always fold the open end, to protect the plaster from the moisture.
Always mix powder to water, and not water to powder.
Powder should be mixed with clean water preferably in clean plastic beckets to avoid mixing with impurities.
Dry powder should immediately be mixed to water, in order to keep the mixing time to a minimum.
Material should be thoroughly mixed, and free from lumps and impurities before use.
Once a mix has begun to set it should not be tampered with, nor should fresh gauging be mixed with the old one.