Factory:  Corner Steyr & Alfa Sts 
Aureus Industrial sites 
RANDFONTEIN  
Email: info@keramicalia.co.za
Website: www.keramicalia.co.za
Cell: Dave  082  808 4757
Email: keraccounts@iafrica.co.za
Accounts: Myrtle Wakeford
Tel: (011) 764 2139
Tel: (011) 412 3261
P O  Box 2288
Wilro Park,1731

Hardcast is a product range based on a complex silicate bonding system. It is totally inorganic, quick setting, strong, acid resistant and refractory. Hardcast is also made in plaster and casting grades. Hardcast is also available as a lightweight insulation material. The lightest is the injectable insulation, with a density of 0,3g/cm³. Normally the density is around 2,2 to 2,4g/cm³.

Hardcast sets within 2 hours, and is fully serviceable within 24 hours. It can be applied to any structurally sound surfaces. Damp floors or dirty floors should first be painted with Hardcast binder. Hardcast is fully resistant to Sulphuric acid, Hydrochloric acid, Nitric acid, Phosphoric acid and organic acids. It is not resistant to Hydrofluoric acid or alkalis.

Hardcast fine is supplied in two parts; 20Kg bags of bright white powder and 33.3Kg drums of the liquid Hardcast Binder. Add +50% binder to the powder. (Two parts powder to one part binder by weight) Shelf life is virtually indefinite in unpunctured bags.

Hardcast fine has a thick viscous consistency, and is very easy to work with. It should preferably be placed within 20 minutes of mixing, and should not be left exposed for more than 10 minutes, as it forms a thin air-set skin which will not bond. The surface texture is very smooth. It is not suitable as a traffic surface. It can be made non-slip by sprinkling clean sand onto the fresh surface immediately after trowelling.

Hardcast fine can easily be coloured. The natural colour is light beige. Other colours which have been made are; concrete colour, red, blue, white, green, black. Most other colours can be made at a slightly increased cost. Grindings from cutting of acid brick may be added to Hardcast fine and smeared over the joints to make the joints less visible when used with red acid brick.

Hardcast fine costs R81/kg. Installed cost is therefore around R145 per square metre at a thickness of 5mm. Ordering; If one tonne is ordered, you will receive 10 x 33,3Kg drums of liquid binder and 33 x 20Kg bags of powder. Binder charged at R24/kg.

Applications; Mostly used as a mortar for acid resistant brick and tiles. It has very good adhesion, and less chance of failing at the contact surface. However, a continuous backing layer must always be trowelled on first as a backup seal.

Moulding; Hardcast fine takes up very fine detail. After about an hour, it can be stripped from a mould, at which point it has formed a thin liquid layer which acts as a mould release against impervious surfaces. Hardcast will not bond to plastic at all. It bonds well to glass.

When used as a surface finish, The airset skin may shrink and tear, especially in dry weather. To prevent this, cover with plastic immediately after the skin has formed. Otherwise paint the skin with oil. This skin is not chemically set, and is water soluble. It is however only a fraction of a millimetre thick.

All Hardcast products set very rapidly on a hot surface.

Hardcast is not porous, and will not absorb liquids.