Leak stopping cement admixture

Seals against high water pressure

Can be diluted up to 1 : 4 with water

Internal and external use

Suitable for contact with drinking water Chloride free

Makes mortar set in seconds

Sika 4a Waterstop is a liquid additive which when mixed with cement results in mortar setting in seconds.

Ideal for making a plug of mortar to stop leaks in basements before putting a water proof slurry or lining system in front.

Fast set additive for cement. Mix in a gloved hand with cement and push firmly into a weeping water hole to stop the water.

Reminiscent of the boy with his finger in the dyke, this really does the job

DIY Applications:

Mortar fast set additive

Cement fast set additive

Professional Applications:

Sealing against high and moderate water pressure infiltrations in concrete, rock or masonry.

Allows Sika 1 renders, gunite or shot crete to be applied on structures exposed to running surface water.

DIY Benefits:

Ready to use

Rapid setting time

Just add water and portland cement

Well proven

Contains no chlorides

Suitable for potable water contact

How to Step-by-Step:

Mix in a gloved hand with cement.

Push firmly into a weeping water hole to stop the water.