Sika 1 Waterproofer (25l) is a waterproofing solution used in rendering, mortar, and concrete. It contains complex colloidal silicates that swell and block the substrate’s capillaries and pores in the presence of water, making it a highly structural water-proofer.
Sika® 1 Pre-Bagged Structural Waterproofing System
Sika® 1 Pre-Bagged Structural Waterproofing System mortars 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 liquid waterproofing admixture they provide the multicoat components for the structural waterproofing systems
■Internal waterproofing of below ground structures to meet the requirements of BS8102 –2009 Grades 1 – 3
■Waterproofing of swimming pools and other water retaining structures
■Waterproofing of basements, cellars and vaults
■Waterproofing of tunnels
Characteristics / Advantages
■Internal waterproofing of below ground structures to meet the requirements of BS8102 – 2009 Grades 1 – 3
■Waterproofing of swimming pools and other water retaining structures ■Waterproofing of basements, cellars and vaults
■Waterproofing of tunnels
■90 years track record
■Type A waterproofing system according to BS8102- 2009 ■Proven resistance to hydrostatic back pressure
■Fully bonded waterproofing barrier
■Can be applied to wet substrates
■For use on concrete, brick and structural blockwork
■Can be used internal and externally
■Can be applied to wall, floors and soffits
■Quality controlled system
■Used for negative or positive water pressure situations
Approval / Standards
Accredited by the BBA cert Number 00/3761 which states under durability “Under normal conditions of use, the systems will provide an effective barrier to the transmission of liquid water for the life of the building to which they are applied. WRAS Certificate 0505506
Storage Conditions / Shelf-Life
Sika® 1 Pre-bagged mortars – Minimum 6 months in original unopened sealed packs stored in dry condition at temperatures between +10°C and +30°C
Sika® 1 Liquid Admixture – Minimum 1 year in unopened original sealed containers stored in dry conditions at temperatures between +10°C and +30°C).
Consumption and Dosage
Sika® 1 liquid admixture is diluted 1:10 by volume with clean water to form a gauging solution.
1st coat 25 kg bag Sika® 1 Spritz & Bonding Coat Mortar solution
2nd coat 25 kg bag Sika® 1 Render Mortar
3rd coat 25 kg bag Sika® 1 Finish Mortar
3.3L gauging soultion 3.3L gauging solution
A mixed 25kg bag of Sika® 1 Pre-bagged Spritz & Bonding Coat Mortar will yield ~12.5L of mortar which is sufficient to cover ~2m2 at 6mm thick.
A mixed 25kg bag of Sika® 1 Pre-bagged render or finish mortar will yield ~ 12.5L of mortar which is sufficient to cover ~2m2 at 6mm thick
1st coat 25 kg bag Sika® 1 Spritz & Bonding Coat Mortar 2nd coat 25 kg bag Sika® 1 Spritz & Bonding Coat Mortar 3rd coat 25 kg bag Sika® 1 Screed Mortar
5.7L gauging solution
5.7L gauging solution 2.5L gauging solution
A mixed 25kg bag of Sika 1 Pre-bagged Spritz & Bonding Coat Mortar will yield ~ 12.5L of mortar which is sufficient to cover ~1.2m2 at 10mm thick.
A mixed 25kg bag of Sika® 1 Pre-bagged Screed Mortar will yield ~ 12.5L of mortar which is sufficient to cover 0.6m2 at 20 mm thick.
The substrate must be structural sound and generally brickwork, dense concrete block and concrete normally provide satisfactory substrates. All surfaces should be clean and free from surface contaminants and laitance to achieve an adequate bond.
All existing treatments shall be completely removed and the exposed surfaces roughened by mechanical or water blasting techniques, followed by washing down and brushing to ensure full removal of all loose material. Mortar joints should be bonded and sound.
Any defective mortar joint should be raked out to a depth of 12.0mm and repointed using Sika®-1 Finishing Mortar made up with clean water.
All laitance shall be removed to expose coarse aggregate by mechanical or water blasting techniques.
On new concrete walls Sika® Rugasol® MH Concrete Retarder can be applied to the face of the shuttering followed by wire brushing and washing of concrete surfaces.
All existing treatments shall be completely removed and the exposed concrete floor mechanically prepared, washed down and brushed to ensure full removal of all loose debris to give an exposed aggregate finish, free of laitance, and surface contamination.
Notes on Application
Detailing and specification support is available from our Technical Department.
Levelling of walls and screeds
Undulating surfaces should be levelled after application of the Sika® 1 prebagged systems for optimum performance.
Joints/cracks subject to movement should be treated using Sikadur Combiflex joint system prior to the application of the Sika® 1 Pre-bagged waterproofing systems. Cracks leaking water should be sealed with Sika Injection systems or plugged using Sika 4a.
Curing Sika® 1 Pre-bagged Waterproofing render systems must be kept moist during the work period and for a minimum 7 day period after final application to stop drying out and reduce cracking. They should be prevented from being exposed to sudden changes in air temperature and relative humidity.
Fixings should be bonded onto the Sika® 1 Pre-bagged waterproofing system or pockets created before installation. See standard detailing sheet.
Timber battens can be adhered onto the Sika® 1 Pre-bagged Waterproofing Render using Sikaflex 11FC to facilitate the application of a dry lining system.
Sikadur 31 CF can be used to structurally bond fixtures to the Sika® 1 Pre-bagged waterproofing system.
Ensure the Substrate is structurally sound before installing Sika® 1 Pre-bagged waterproofing systems.
Overcoating To provide a smooth finish suitable for decorating, use Sika Whitewall plaster or SikaMur finish plaster to the wood float finished third coat of the Sika® 1 Pre-bagged Waterproofing render system.
Sikagard and Sikafloor coatings can be applied directly to Sika® 1 Pre-bagged Waterproofing Systems to enhance durability and aesthetics.
Sealing of Pipes and Ducts – Refer to detailing sheet.
Installation should be carried out by Sika Recommended Contractors.
Reference should always be made to the Detailing, Architectural and Engineering Consideration Sheets, Agrement Certificates and Installation Guides.