

Sika 1 Waterproofer Liquid Admixture 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.
Features and Benefits
Sika 1 Waterproofer Liquid Admixture 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.
Sika 1 Waterproofer Liquid Admixture is used with Sika 1 Structural Waterproofing System mortars which are pre-bagged, kiln dried blends of specially graded aggregates and cements packaged in 4 grades at the appropriate mix ratios for optimum application performance and durability. When mixed with the diluted Sika 1 Waterproofer Liquid Admixture they provide the multicoat components for the structural waterproofing systems.
Sika 1 Waterproofer Liquid Admixture can be added in measured quantities to Sika mortars to create;
Features and Benefits
For more details please download the product data sheet from the 'DATASHEETS' tab above.
Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.
![]() | Question:
I need to build a 1 block high wall, 225mm thick to form a bund around a pump. The floor is a concrete slab. Can I use Sika-1 as the mortar for the blocks both vertical and horizontal beds and the 'base bed' between the floor and the block? Can I then coat the inside of the bund with Sika Damp Proof Slurry? The pump is for water and develops a slight leak at times. Thank You. |
Answer from Rawlins’ Technical Team:
Thank you for the enquiry, we have contacted you directly for more information. | |
![]() | Question:
Can I use Sika1 to waterproof block paving driveway. |
Answer from Rawlins’ Technical Team:
Sika 1 as a system does provide waterproofing but on a floor you would need to apply a 30mm screed for full waterproofing. We would recommend Hydron Mona-Guard Nhance be applied to block paving to provide a water and stain repellent finish. | |
![]() | Question:
Hi which sika waterproofing admixture do I need to mix with my concrete sub base to stop water penetration? As you sell a ready mixed ve Dion of the sika1 also. Also mixing ratios for either product and quantity needed to order area as follows. 5m x 4m 150mm depth concrete. 5m x 4m 75 mm depth screed. Thanks |
Answer from Rawlins’ Technical Team:
As a general waterproofer the Sika 1 Waterproofer Liquid Admixture should be applied at a ratio of 0.75 litres per 25kg bag of cement. We don't have a ready mixed version of this product. | |
![]() | Question: what is the mix ratio for 3:1 sand and op cement for repointing eng. brickworrk? |
Answer from Rawlins’ Technical Team: Sika 1 Waterproofer Liquid Admixture can be added to a sharp sand and portland / good quality cement in order to make a waterproof render or screed. Typically this mix will be either 3:1 or 4:1. | |
![]() | Question: Can Sika 1 Waterproofer Liquid Admixture simply be painted onto a damp wall/floor and seal them against moisture transfer. This is for a garage so does not have to be absolutely waterproof just help reduce ingress. Thanks |
Answer from Rawlins’ Technical Team: No, something such as Sika Damp-proofing Slurry may be more suited to your application. | |
![]() | Question: Can you use this with ordinary sand and cement to form the same barrier |
Answer from Rawlins’ Technical Team: Sika 1 Waterproofer Liquid Admixture can be used as an additive for a sand and cement render, please download and view the TDS (Technical Data Sheet) for the product available from the 'Download' section above. | |
Sika 1 Waterproofer Liquid Admixture is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.
Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.
Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.
All delivery costs below are excluding VAT