Sika® Damp Proofing Slurry

British Board of Agreement Certificate No. 00/3761
Conforms to the requirements of BS EN 1504-2:2004 Principles 1.3, 2.2 & 8.2, Annex ZA2 Table ZA.2

Portland cement selected aggregate and polymers

6 months from date of production

Must be stored properly in undamaged and unopened original sealed packaging in dry and cool conditions.

Fresh mortar density: ~ 2.1 kg/l (1.8 kg/litre powder)

Static: ~ 18 kN/mm²

>1.5 N/mm² (failure in substrate)

3 MNsg^-1

1.0 mm min.
2.0 mm max.

For damp-proofing use minimum 2.0 mm thickness
For waterproofing use minimum 4.0mm thickness

+5°C min. / +35°C max.

+5°C min. / +35°C max.

~ 30 minutes at +20°C

Apply 2nd coat within 24 hours of first coat.

Dependent on the substrate roughness, surface profile and thickness of the layer applied.

As a guide, ~ 2.1 kg/m²/mm (excluding allowances for loss wastage, surface profile and porosity, etc.).

1 unit of 25 kg yields will cover approximately 6.5-7.0m² @2.0mm thickness.

Slurry application (brush): 4.5 – 4.7 L water per 25 kg bag
Mortar application (trowel): 4.0 – 4.25 L water per 25 kg bag
Spray application: 4.0 – 4.5 L water per 25 kg bag   

Mixing Time:  ~ 3 minutes

Mixing Tools

Sika® Damp Proofing Slurry Should be mechanically mixed using a forced action mixer or in a clean bucket using a drill and plaster paddle stirrer (max 500 rpm).  A normal concrete mixer is NOT suitable.

Pour the required mix ratio of water into a mixing bucket and add Sika® Damp Proofing Slurry slowly under continual mixing until a uniform lump free consistency is achieved (approx 3 minutes).

The substrate should be dampened thoroughly with no standing water before application.

Slurry Application:
Apply Sika® Damp Proofing Slurry in even layers using a flat fibre brush on vertical surfaces and a rubber squeegee or brush for horizontal surfaces and allow to stiffen (2-6 hours).  Apply a second coat of Sika® Damp Proofing Slurry as soon as the first coat has hardened and within 24 hours at the same coverage rate.

Mortar Application:
Apply the first layer of Sika® Damp Proofing Slurry using a tooth trowel.  Once the first coat has hardened, use a smooth edged trowel to apply the second coat.

Spray Application:
Use wet spray equipment to apply the first and second coats of Sika® Damp Proofing Slurry ensuring the first coat has hardened sufficiently to prevent damage from the second spray application.  Smooth second coat using brush or trowel.

For all applications apply second coat at 90^o to the first coat.

Internal finishes:  
Plasterboard for drylining can be bonded using plaster dabs, Sikaflex® 11FC or Sikaflex EBT. Timber battens can also be bonded with Sikaflex® 11FC or Sikaflex® EBT.  Finish plasters can be used.  Do not pre-wet surface before applying plaster finishes.  Do not use gypsum based plasters.  Refer to plaster manufacturer for advice for use in damp-proofing works.

In damp internal conditions Sika® Damp Proofing Slurry does not need curing.  Ensure windows are closed to prevent drying winds.  In external conditions when exposed to the sun and/or drying winds protect from drying out.  Use polythene sheeting or other approved method.

Clean all tools and application equipment with clean water immediately after use. Hardened / cured material can only be removed mechanically.