Method of testing As per JS4456 Part I
Silicate cements cannot be applied directly to foundation of concrete or ordinary cement and therefore an insulating layer must first be applied to such foundations. The concrete or cement surface should be first given of our anti corrosive ‘VIKOSEAL.-AR’ primer. Over the dried, primed surface a intermediate coat of our ‘VIKOSEAL-AR’ Bitumastic of desired thickness shall be applied.
In case of pressure vessel which must withstand stringent chemical and thermal stresses circulation of acid within the pores fo the brickwork is often possible because of applied pressure and vaccum.
In such cases it is necessary to use an insulating interlines which is impervious to liquids between the brickwork & the metal wall. Following interlines are recommended.
• Homogenous Lead Lining
• Rubber Lining
• P.V.C. Lining
• Epoxy coating or screeding
Silicate cements must not be mixed with ordinary cement or with other fillers or additives but must be used in their original unadulterated state.
CHEMICAL RESISTANCE :
R : Resistant; LR : Limited Resistance; NR : Not Resistant
Advantages of ‘VIKOPROOF- SDK’ cement over ‘VIKOPROOF-SD’
‘VIKOPROOF –SDK’ Potassium Silicate Cement has advantages over ‘VIKOPROOF-SD’ Sodium Silicate Cement linings in that eh former is not subject to crystal formation in the pores of the cement. Such crystal formation is observed in the later especially where sulphuric acid, acetic acid or phosphoric acid is being used, particularly if the tiles are not continuously rinsed with water.
SHELF LIFE : Silicate cements have indefinite shelf life if stored in proper moist free conditions.
PACKING : Powder : 50 kg packed in hessian Bags with LDPE liner.
Liquid Binder : 17kg, 35kg, 50kg, 250kg, packed in M.S. Drums. Special
Packing of liquid can be given as per requirement.