SWS Slurry is a cement-based waterproofing coating, used for sealing and protecting structures exposed to active or passive water.

Areas of Application

Concrete and masonry substrates

• Cellars
• Active or passive waterproofing
• Basements
• Tunnels & water retaining structures
• Underground parking areas

Benefits

• Excellent Waterproof barrier to the negative and positive side
• Non-toxic
• Can be applied to damp substrates.
• Efflorescence-free
• Ease of application, simply mix and apply by brush
• Excellent Adhesion properties to sound substrates

Coverage Rates

Type of water impact Recommended overall application rate Total layer thickness (approx.) Pressureless water 3 – 4 kg/m² 1.5 – 2 mm Water under pressure 5 kg/m² depending on water pressure 2 – 3 mm

Application Information

Preparation:

Concrete Substrates

The substrate to be treated must be sound and even, open pored, roughened and its surface free from voids, large cracks or ridges. Any adhesion reducing substances like bitumen, oil, grease, remains of paint or laitance must be removed by suitable means, such as sandblasting, scabbling etc. Construction joints and shrinkage cracks exceeding 0.3 mm should be routed out to a minimum depth of 20 mm. Shutter tie holes should be roughened. Water leaks must be stopped using Rapid Setting Plug. Thoroughly moisten the substrate. It must be damp but not wet at the time of application. Any surface water on horizontal surfaces must be removed.

Brick and Blockwork Substrates

Any remaining plaster, render or other substances that could inhibit bonding must be removed back to the substrate.
Gypsum, remains of wood or other foreign material should be removed by appropriate means. Loose mortar must be routed out and the substrate cleaned thoroughly

Mixing

Mix 25 kg of SWS Slurry with 6 – 8 litres of Diluted Bondaid plus in a clean container for at least 3 minutes to a lump-free, homogeneous consistency. Use a mechanical mixer.

Application

SWS Slurry is applied with brush, trowel or suitable spray equipment.

Dampen the substrate thoroughly with clean water before applying SWS Slurry. Ensure that the substrate is still damp
when applying the first coat of SWS Slurry. A maximum of 2 mm (approx. 3 kg/m²*) can be applied in two coats. Please refer to relevant coverage rate. It is recommended to apply the next coat whilst the previous coat is touch dry on the surface, the previous coat must not be damaged during application of the following coat. The waiting time before applying the second coat is usually between 2 – 4 hours depending on climatic conditions such as humidity, temperature, etc. Do not apply at temperatures below +5 °C, or to a frozen substrate. Only mix sufficient product that can be used within 40 minutes.

Re-plastering – The second has to be touch dry, for the plaster to adhere to the second coat of the SWS Slurry.

Curing of plaster

Surfaces treated with SWS Slurry cementitious products to be coated or painted should be left to cure for 4 weeks. When a plaster orrenderfinish is required,it is essential to apply a rough cast of sand and cement on the SWS cementitious coat while it is still‘green’.

On hardened surfaces apply an appropriate bonding agent before rendering, (not PVA) Coatings on top of a SWS treatment have to be alkali resistant.

Decorative coatings and paints should be water vapour permeable

Brush application

Can be used to ‘prime’ the surface. Ensure that all cavities in the substrate are filled and appropriate cover is achieved. It should be applied to a level surface to avoid insufficient coverage.

Trowel application

First a scratch coat is applied for maximum adhesion to the substrate, working from the bottom up. Ensure all cavities in the substrate are filled, to exclude any trapped air.

Spray application

SWS Slurry can be sprayed typically using a nozzle with a diameter of 6 mm. Apply first coat of SWS Slurry in a circular motion with spray nozzle at a 90° angle to the substrate. The material is flattened and keyed. The final layer can be left as a spray finish or for further advice refer to ‘Plastering/Coating’ section.

Properties

Appearance Grey Powder Packaging 25 kg Storage Keep in dry conditions at a temperature of 5°C to 35°C.Protect from frost and direct sunlight Pot Life 30 to 40 minutes depending on the weather conditions. Shelf Life 12 months Coverage 3 – 4kg/m2* Min. Coats Required 2 Coats Strength 28 days 53N/M Tensile Strength 28 days 4.5 Flexural Strength 28 days 11 Adhesive Strength 28 days 3.1

Other Information

For health and safety information see the Safety Datasheet(available upon request).

QUANTITY: 25kg

COVERAGE: 8m2

VAT: 78.26