EWI-221 Rapid Set Adhesive
Rapid Set Adhesive for EWI – Speed Up Your Work, Not Just for Winter!
Rapid Set Adhesive is the perfect choice when you want to get the job done faster. With its fast-setting formula, it helps you save time on-site and keep your projects moving – all year round.
✅ Fast setting – ready for the next step in just a few hours
✅ Works well in cold weather – ideal for UK conditions
✅ Use – suitable for EPS
✅ Strong and reliable bond – even on tricky surfaces
✅ Saves time – speeds up installation and reduces downtime
Why do installers in the UK use it mostly in winter?
Because it works reliably even in low temperatures, helping you keep going when other adhesives slow you down.
But this isn’t just a winter product – it’s the perfect choice whenever you need to work quickly and efficiently.
Preparation
The EWI-221 comes as 25kg dry mix. 6.3 litres of water need to be mixed with the dry mix to form the adhesive mortar. Once set firm and hard, it has excellent water and frost resistance and unsurpassed adhesive properties in colder weather. We suggest using a large bucket and adding the water prior to the winter adhesive. Once the winter adhesive has been added to the water, it needs to be mixed using a paddle mix until an even consistency mortar is produced. Once the winter adhesive has been mixed, leave the bucket for 5-10 minutes and then remix using the paddle mix. The adhesive is then ready for use.
Application
The presence of microfibres in the winter adhesive means that it will still set in a timely fashion even at low temperatures. This means continuous workflow when conditions would normally prevent it. EWI-221 Winter Adhesive can be used for two purposes:
- An adhesive used to create the reinforcement basecoat layer.
- An adhesive used to fix expanded polystyrene (EPS) to a substrate.
EWI-221 is prepared in the same way regardless of whether it is being used as a basecoat adhesive or to fix the EPS insulation boards to the substrate. EWI-221 should not be used for fixing extruded polystyrene (XPS) and thermal insulation on bituminous substrates.
Application Conditions
- Substrate primer: EWI- 301 or EWI-310 if a key is required
- Application temperature (air, substrate, materials): from +0°C to +25°C
- Water mix proportions: approx. 6.3 l of water per 25 kg of dry mix
- Time of usability after mixing with water: approx. 2 hours (temp. +20°C)
- Quantity to be used: approx. 4-5 kg/m2
Storage Conditions
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.
