Waterproofing

Cement based treatment for roofs and similar structures  PERMAKAR 3 treatment

Cleaning the surface preparing the surfaces by acid etching treating the surface with a twolayer plaster the first layer shall be 5 mm thick with cement slag admixed with an octadecanoic acid based cementitious waterproofing compound bulk density not  greater than 05 gmcc moisture content not greater than 20 and free fatty acid not greater than 02 eg PERMAKAR 3 in the weight ratio of 503 for cement and waterproofing compound finally providing a 12 mm thick cementsand 14 plaster enriched with polyester fibre and curing the plastered surface the treatment shall be impermeable under a waterhead of 200 metres

Sealing of cracks in concrete roofs

Making a Vshaped groove 810 mm wide and 35 mm deep filling the groove with acrylicstyrene based copolymer waterproofing compound eg PERMANARD in water by repeated application of the waterproofing compound spreading dry coarse sand when the last application of the sealing compound will still be wet removing the excess sand on the following day and letting the treatment dry up for at least a day before any surface treatment on the roof  

Drain mouth on roof

Cleaning the surface of the structure at the final location of the drain mouth lowering the drain mouth to the level of the concrete roof chipping thorough cleaning mixing thoroughly an octadecanoic acid based cementitious waterproofing compound bulk density not greater than 05 gmcc moisture content less than 20 and a free fatty acid less than 02 eg PERMAKAR 3 in the weight ratio of 50 cement slag and 3 waterproofing compound placing the drain mouth in its final position followed by filling of the annular space around the drain pipe with a paste of waterproofing compoundcement sealing the edges of the drain mouth with acrylicstyrene based copolymer waterproofing compound eg PERMANARD

Treatment of expansion joints

Cleaning the joint and surfaces abutting the expansion joint applying two coats of primer on the cleaned surfaces at the opening of the joint filling the joint to a depth equaling half the width with the paste of a twocomponent with basecuring agent weight ratio of 12331 and a sp gr of 160010 gmscc and a minimum elongation of 250 on curing for 24 hours polysulphide based sealant eg PERMASULPH permitting the sealant to cure in natural air for at least a day providing the edges of the treatment with two coats of a paste of cement octadecanoic acid based cementitious waterproofing compound eg PERMAKAR 3 and acrylicstyrene based copolymer eg PERMANARD