EWI Pro EWI-221 Winter Adhesive and Basecoat Render 25kg is an ideal product with frost-proofing capabilities for installing EPS (polystyrene) thermal insulation systems during cold weather that can be used in temperatures down to 0°C.

This Cement based winter adhesive and basecoat render EWI-221 is manufactured from a mixture of white Portland cement, mineral fillers, polymers, refining agents and microfibers offering long-lasting performance that will stand for years to come.

EWI-221 Winter Adhesive is a highly durable, elastic and quick drying powder that can be used all year round as a bedding adhesive to stick the EPS to the masonry substrate, but tends to dry too quickly for reinforcing mesh basecoat layer above 12-13°C.

EWI Pro Winter Adhesive and Basecoat Render EWI-221 comes as a dry mix powder in 25kg bags and should be mixed with 6.3 litres of clean cool water.

Use an electric paddle to mix the product thoroughly to produce a consistent texture then leave for 5 minutes and mix again, now it is ready for application.

Specification:

Nominal thickness: 4mm - 10mm 

EWI-221 Winter Adhesive: approx. coverage 5m2

Mixing time: approx. 5 - 10 minutes

Mixing ratio: 6.3 litres per 25kg bag

Application: by hawk and trowel

Weight: 25kg

Consistency: dry mix powder

EWI Pro EWI-221 Winter Adhesive and Basecoat Render Application:

 · When using the EWI-221 as a bedding adhesive for the EPS, 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 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 through the EPS boards.

 · After fixing the insulation boards to the substrate and leaving to dry for 3 days, use the EWI-221 adhesive for the reinforcement basecoat layer.

 · Apply to the insulation boards using a 10mm notched trowel, and before drying embed fibreglass mesh within the basecoat adhesive.

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

Substrate Preparation for EWI-221 Winter Adhesive:

 · When using the EWI-221 Winter Adhesive as a bedding adhesive for EPS insulation, ensure that the substrate surface is clean and free of any debris.

 · For uneven substrate surfaces, consider using the EWI-260 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, use a jet wash first before coating the surface with the EWI-301 Water Based Primer.

 · For painted surfaces, check for structural stability first, then consider using the EWI-310 Universal Primer, which will create an abrasive surface ready for the EWI-221 Winter Adhesive to key onto.

 · When using the EWI-221 as part of the basecoat reinforcement layer, ensure the EPS boards are level prior to application.

EWI-221 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.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet