Sika®-1 Waterproofer is 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. 
Concentrate waterproofing admixture
Blocks the pores and capillaries in the mortar
Prevents the transmission of water
Suitable for use in renders after DPC replacement
Can be used in all Cement Floor Screeds and Wall renders
Internal and external use
Suitable for contact with drinking water
Economic in use
Chloride free
https://dam-assets.apps.travisperkins.group/ymb25/GPID_1000135385_COSHH_00.pdf
https://dam-assets.apps.travisperkins.group/dRoeJ/GPID_1000135386_COSHH_00.pdf