EWI Pro EWI-220 EPS Adhesive and Basecoat Render 25kg is a cement based adhesive manufactured from a mixture of Portland cement, texturing aggregate, mineral fillers and hydrated lime used to fix EPS insulation to substrates and also as part of the basecoat render reinforcement layer.

Cement Based Basecoat EWI-220 is a grey dry mix powder used to embed in the fibreglass mesh as part of the reinforcement layer on polystyrene (EPS) thermal insulation within External Wall Insulation (EWI) systems.

EWI Pro EPS Basecoat is a highly durable, elastic, quick drying and frost resistant base coat that can be used as a bedding adhesive to stick EPS boards to a wide range of substrates.

The presence of polymer-modified binders within the adhesive deliver strong adhesion, better flexibility, higher crack resistance and improved durability of the EWI-220 product.

EWI-220 EPS Adhesive and Basecoat Render comes as a dry mix powder in 25kg bags and should be mixed with 5.8 litres of clean cool water.

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

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

Specification:

Nominal thickness: 4mm - 10mm 

EWI-220 Basecoat & Adhesive: approx. coverage 5m2

Mixing time: approx. 5-10 minutes

Mixing ratio: 5.8 – 6.0 litres per 25kg bag

Application: by hawk and trowel

Weight: 25kg

Consistency: dry mix powder

EWI-220 Application:

 · When using the EWI-220 as a bedding adhesive, applying the adhesive to the back of the EPS insulation board using an appropriate trowel.

 · For uneven substrates, we recommend applying the adhesive to the perimeter of the 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.

 · Allow the adhesive to dry completely before attempting to install the mechanical fixings.

 · When using the EWI-220 as a basecoat adhesive, apply the adhesive to the insulation board using a 10mm notched trowel.

 · Before drying, fibreglass mesh needs to be embedded within the basecoat adhesive.

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

Substrate Preparation for EWI-220 EPS Basecoat and Adhesive:

 · When using the EWI-220 Basecoat as a bedding adhesive for EPS insulation, ensure the surface is clean and free from any debris.

 · For uneven surfaces, consider using the EWI260 Levelling Mortar, which can be applied up to a thickness of 50mm to level out the substrate.

 · If the surface is dusty prior to starting the installation process, then consider using a jet wash first before coating the surface with the EWI-301 Substrate Primer.

 · For painted surfaces, check for structural stability first, then consider using EWI-310 Universal Primer, which will create an abrasive surface ready for the EWI-220 Basecoat adhesive to key onto.

 · When using the EWI-220 Basecoat as part of the basecoat / reinforcement layer, ensure the insulation boards are level prior to application.

EWI-220 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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