EWI-225 Premium Basecoat is our strongest and most flexible basecoat adhesive. It is used in render-only systems as a basecoat – the Premium Basecoat eliminates the need for priming prior to skim-coating with render, reducing time and costs. In external wall insulation systems, the Premium Basecoat can also be used to attach Mineral Wool boards to the wall.
EWI-225 Premium Basecoat is our finest basecoat adhesive – it is used to fix mineral wool insulation boards to substrates in addition to being used within the basecoat layer. The adhesive is white due to the presence of white Portland cement – making it stronger than other basecoat adhesives (EWI-220 and EWI-210). Once the basecoat has dried it provides and incredibly strong and flexible basecoat layer and as such we recommend using the basecoat when applying ‘render only’ systems to substrates
The EWI-225 Premium Basecoat is breathable, high strength and waterproof.
EWI-225 Premium Basecoat can be used for two purposes:
EWI-225 is prepared in the same way regardless of whether it is being used as a basecoat adhesive or to fix the mineral wool insulation boards to the substrate.
The Premium Basecoat comes as a dry mix in 25kg, so needs to be mixed with clean, cold water ( >5.9 litres) prior to use. We suggest using a large bucket and adding the water prior to the Premium Basecoat dry mix. Once our Premium Basecoat has been added to the water, it needs to be mixed using a paddle mix until an even consistency mortar is produced.
Once the Premium Basecoat has been mixed sufficiently, leave the bucket for 5-10 minutes and then remix using the paddle mix – the adhesive is then ready for use.
If using the Premium Basecoat for the basecoat layer, apply the basecoat using a 10mm notched trowel to the substrate. Then embed overlapping pieces of fibreglass mesh – the mesh should sit within the middle of the basecoat layer. Once embedded the basecoat layer should be 6mm in total.
If using the Premium Basecoat to fix Mineral Wool to the substrate, the basecoat can either be applied to the whole surface of the insulation board using a notched trowel or applied to the perimeter of the insulation board + 3 dabs across the middle.
1 x 25kg bag – 4-5m2
Do not dispose of Premium Basecoat along with household rubbish. Ensure that Premium Basecoat packaging is clean and empty before disposal. Leftover product should be not be allowed to reach sewage or watercourse systems.
Comes in powder form in a 25kg paper bag.
Store in a cool, dry place. Avoid ingress of water. Shelf life: up to 12 months from the date of manufacture.