EWI-226 Aquabase XPS Basecoat and Adhesive 25kg is a durable and vapour permeable waterproof base coat adhesive, and ideal product for installing XPS insulation sheets below the DPC and as a basecoat to internally reinforce walls in bathrooms and wetrooms.

EWI Pro Aquabase EWI-226 is suitable for use with extruded polystyrene (XPS) insulation boards to a substrate (with high water ingress risk) and for embedding fiberglass rendering mesh to create a smooth surface with a high tensile strength.

Water Resistant Basecoat Render and Adhesive EWI-226 is a strong waterproof basecoat adhesive designed for internal and external applications where there is a high risk of water ingress offering complete water-resistance for years to come.

EWI-226 Water Resistant Basecoat is a perfect solution manufactured from a mixture of Portland cement, polymers, mineral fillers suitable for areas exposed to high levels of water, for example the DPC area or in bathrooms for around showers or baths, and in wet rooms.

XPS Basecoat Render and Adhesive EWI-226 can be finished with Mosaic Render to produce a water repellant and durable surface, but is not intended for use in swimming pools. 

EWI-226 Aquabase XPS Basecoat and Adhesive comes as a dry mix powder in 25kg bags and should be mixed with 5 to 6 litres of clean cool water.

Use an electric paddle to mix the product thoroughly to produce a consistent texture then leave for 2 - 3 minutes and mix again, now it is ready for application.

Specification:

Nominal thickness: 2mm - 5mm 

EWI-226 Aquabase: approx. coverage 5m2

Mixing time: approx. 2 - 3 minutes

Mixing ratio: 5 to 6 litres per 25kg bag

Application: by hawk and trowel

Weight: 25kg

Consistency: dry mix powder

EWI Pro EWI-226 Waterproof Basecoat Adhesive Application:

 · When using the EWI-226 as a bedding adhesive, apply the adhesive to the back of the insulation board using an appropriate trowel.

 · For uneven substrates, we recommend applying the adhesive to the perimeter of the XPS insulation board with 3 additional dabs across the middle of the board.

 · For flat substrates, you can apply the adhesive to the entirety of the insulation board using a notched trowel.

 · When using the EWI-226 as a basecoat adhesive, apply the adhesive to the insulation board using a notched trowel.

 · Before drying, Fibreglass Mesh needs to be embedded within the basecoat adhesive.

 · Another layer of the product needs to be applied to the top of the reinforcement layer to achieve water tightness.

 · Works must be protected from rain, snow, strong winds and direct sunlight.

 · The average drying time for the bedding adhesive is 12-48 hours depending on weather conditions.

 · The drying period may be significantly longer in low temperature and high relative humidity.

Substrate Preparation for EWI-226 Aquabase:

 · When using the EWI-226 as a bedding adhesive for XPS insulation, ensure the substrate is clean and free of any dust or debris.

 · For uneven substrates, consider using levelling coats using the same product – applying 2mm to 5mm max.

 · Reapply the same product in layers until you are satisfied with the levelness of the surface.

 · If the surface is dusty prior to starting the installation process, then use a jet wash first before coating the surface with the EWI-301 Water-Based Substrate or EWI-302 Deep Penetrating Primer.

 · For painted surfaces, first check for structural stability then consider using EWI-310 Universal Primer, which will create an abrasive surface ready for the EWI-226 Water Resistant Basecoat to key onto.

 · When using the EWI-226 as part of the basecoat / reinforcement layer, ensure the insulation boards are level prior to application.

 · On the reinforcement application to achieve water tightness you will require two passes of the product. 

EWI-226 Certification and Standards:

 · PN-C-81913:1998 Dispersion paints for façade painting.

 · European Technical Approvals ETA – 15/0576 and ETA – 15/0575.

 · BBA Approval Inspection Testing Certificate 18/5503.

*Further information may be found in our Downloads section.

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