Sika 1 Pre-Bagged Screed Mortar is part of the Sika 1 Pre-Bagged Structural Waterproofing System and is the third layer of the floor screed system. A new, upgraded Sika 1 Pre-Bagged Waterproofing System for superior performance and easier application.

The 4 Sika 1 Pre-Bagged Mortars, consisting of a blend of special cement and kiln dried graded aggregates, are ready-made with Sika 1 waterproofing admixtures included as a powder, removing the need for a separate liquid waterproofer – just add water. Packaged in 4 grades, each mortar is specifically designed for optimum application performance and durability.

The Sika 1 Pre-bagged waterproofing system consists of a 3 coat render system for use on walls and overhead surfaces, and a 3 coat screed system for use on the floor.

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• Features & Benefits
• System Information
• Application Notes
• Limitations

Features & Benefits

• Part of the Sika 1 Pre-Bagged Structural Waterproofing System
• Ready-made with Sika 1 waterproofing admixtures included as a powder, removing the need for a separate liquid waterproofer
• Type A waterproofing system according to BS8102:2009
• Proven resistance to hydrostatic back pressure - Can be applied to wet substrates
• Can be used internal and externally - may be applied to wall, floors and soffits
• Used for negative or positive water pressure situations
• Ideal for waterproofing of swimming pools and other water retaining structures
• Also suitable for waterproofing basements, cellars, vaults and tunnels
• Quality controlled system

System Information

Materials:

• Sika 1 Pre-Bagged Spritz & Bonding Coat Mortar
• Sika 1 Pre-Bagged Render Mortar
• Sika 1 Pre-Bagged Finishing Mortar         
• Sika 1 Pre-Bagged Screeding Mortar

System For Walls:

Sika 1 Mortar Waterproofing System for walls consisting of 3 coats as follows:

• 1st coat Pre-Bagged Spritz & Bonding Coat Mortar @ 6mm
• 2nd coat Pre-Bagged Render Mortar @ 6mm
• 3rd coat Pre-Bagged Finishing Mortar @ 6mm

Total System Thickness – minimum 18mm. 

Additional coats of Sika Render Mortar can be applied if necessary.

System For Floors:

Sika 1 Mortar Waterproofing System for floors consisting of 3 coats as follows:

• 1st coat Sika 1 Pre-Bagged Spritz & Bonding Coat Mortar applied as a bonding slurry
• 2nd coat Pre-Bagged Spritz Mortar at 10mm
• 3rd coat Pre-Bagged Screed Mortar at 20mm

Total System Thickness – minimum 30mm.

All the above are minimum thickness, maximum thickness depends on substrate, working conditions and requirements.

Loading conditions may require the screed mortar thickness to be increased.

Application Notes

Walls/Brick:

• 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 Pre-Bagged Finishing Mortar made up with clean water

Walls/Concrete:

• All laitance shall be removed to expose coarse aggregate by mechanical or water blasting techniques
• On new concrete walls a retarder can be applied to the face of the shuttering followed by wire brushing and washing of concrete surfaces

Floors/General:

• 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

Installation should be carried out by Sika Registered Contractors.

Please see the product and system data sheets for detailed application and mixing instructions.

Limitations

• Puncturing the system can compromise its integrity
• Do not expose to frost while curing
• Allow Sika 1 Pre-Bagged Structural Waterproofing System to sufficiently dry out before over coating
• The structure and its elements must be capable of withstanding the developed water pressure and other anticipated loadings without cracking or delaminating
• Advice should be sought from independently qualified personnel with knowledge of the structure and local ground conditions
• Never score or scratch any of the render coats to provide a key
• Do not use gypsum based plaster over Sika 1 Mortar Waterproofing System. Refer to plaster manufacturer for advice on suitability of product for use in waterproofing works