An aqueous solution containing complex colloidal silicates. In the presence of water these swell and block the capillaries and pores in the applied sand/cement renders, screeds and mortar to provide an effective barrier against the transmission of liquid water

Used for structural screeds to resist water pressure below ground when used in conjunction with Sika®-1 pre-batched mortars; waterproof renders to resist moisture above ground; internal below ground basement waterproofing; general waterproofing admixture for mortar

• Proven track record for over 100 years
• Suitable for brick, concrete and stone substrates
• Can be applied against live water infiltration, in conjunction with Sika 2 and Sika 4a
• Wall render and floor screed application
• Can be used internally and externally
• Excellent resistance to backwater pressure
• Approximate coverage 0.75 litres