ATLAS ESKIMO 0.25KG setting accelerator for thin-coat renders

A cold, damp morning is the usual reason an elevation of thin-coat render gets postponed. A render accelerator keeps those days in the programme. Atlas Eskimo, in a 0.25 kg bottle, is the one made for Atlas thin-coat renders, and it works as long as the render in the bucket is one Atlas lists for it and the thermometer reads above freezing.

What This Render Accelerator Changes on a Cold Day

Atlas publishes the additive as ATLAS ESKIMO G. It carries accelerators for the polymer binder in Atlas renders and starts the first cross-linking of that binder while water is still evaporating from the coat. The render therefore reaches a stable film sooner. The additive does not warm the wall and does not make the coat frost-proof.

• Setting: approx. 16 hours at 2 °C and 80% relative humidity, twice as fast as the same render without it.
• Early rain resistance: after 5 hours in the same conditions, three times faster than without it.
• Working range: facade work from 0 °C to +10 °C, with humidity that may run above 80%.

Atlas also states that the additive does not reduce the strength of the render or degrade its performance once set. The two multipliers show what the same day looks like without the bottle. At 2 °C and 80% humidity an untreated coat needs roughly twice 16 hours to set and roughly three times 5 hours before light rain stops marking it. That is the gap between a coat that is safe by the next morning and one that is still soft a full day later.

Which Renders Take It, and How Much Goes in a Bucket

Atlas dedicates the additive to six of its own renders and gives a dose for each. It is not listed for any Ceresit render, nor for sand and cement, monocouche or other mineral renders, adhesives or basecoats. For those, look for a render accelerator from the maker of that render.

Atlas render	Dose	At Renders World
Atlas Silicone Render	up to 1% by weight, up to 0.25 kg per 25 kg	white and grey base, 25 kg
Atlas Silicone-Silicate Render	up to 1% by weight, up to 0.25 kg per 25 kg	25 kg bucket
Atlas Gemini RS	up to 1% by weight, up to 0.25 kg per 25 kg	white and grey base, 25 kg
Atlas Silkon BA	up to 1% by weight	20 kg bucket: up to 0.2 kg
Atlas Silicone Hybrid Render	up to 1% by weight, up to 0.25 kg per 25 kg	not stocked
Atlas Gemini RSX	0.125 kg per 25 kg	not stocked

For the 25 kg buckets on the shelf the arithmetic is simple: one 0.25 kg bottle is the full dose for one bucket, so order bottles to match buckets. Silkon BA is the exception. Its bucket holds 20 kg, and 1% of 20 kg is 0.2 kg, so a whole bottle in one bucket is more than the dose Atlas allows. Measure that one by weight.

Atlas Eskimo G Technical Data

Property	Value
Form and smell	ready-to-use colourless liquid, slight ammonia smell
Relative density	approx. 1.0 g/cm³
Application temperature	0 °C to +10 °C
Setting at 2 °C / 80% RH	approx. 16 hours
Early rain resistance at 2 °C / 80% RH	after 5 hours
Frost after application	after full setting: 18 h after work ends, at the earliest
Packaging	plastic bottle, 0.25 kg
Shelf life	18 months from the production date on the pack

How to Use It on a Cold-Weather Day

1. Check the wall before the bucket is opened. Air and substrate must both be above 0 °C, and the substrate must be free of frost and condensation.
2. Check the night that follows. The temperature may drop below zero only after the render has set completely, which is 18 hours after the last panel is finished at the earliest.
3. Add the bottle just before use. Pour the dose into the render immediately before application, then mix the bucket thoroughly with a mechanical mixer.
4. Apply and texture as normal. The consistency may change slightly with the conditions on the day, so judge the mix by the trowel, not by habit.
5. Keep the scaffold covered. Nets or tarpaulins stay in place until the render surface has bound, and tools are washed in clean water straight after use.

In very high humidity or at temperatures only just above zero, Atlas warns that setting can still take longer than 16 hours. A render accelerator shortens the wait; it does not remove it. For the season as a whole, the month-by-month guide to rendering in UK weather sets out the months and the temperature limits for each render.

Ordering the Accelerator with the Render

Order the render accelerator on the same order as the Atlas render it goes into, one bottle for each 25 kg bucket. The thin coat silicone render range at Renders World shows the Atlas buckets it is dedicated to, alongside the Ceresit renders it is not.

• Dispatch: Renders World processes orders the same day when the stock is there.
• Delivery: the team quotes the most cost-effective delivery after the order is placed; every delivery is kerbside.
• Collection: Unit 9A, Central Trading Estate, Southampton SO14 5JP, Monday to Friday 7am to 5pm and Saturday 7am to 12pm.

FAQ — Atlas Eskimo Render Accelerator

How much goes into one bucket?

Atlas gives the dose by weight of render, so it depends on the bucket:

• Atlas Silicone, Silicone-Silicate, Silicone Hybrid and Gemini RS: up to 1%, which is up to one 0.25 kg bottle per 25 kg bucket.
• Atlas Silkon BA: the same 1%, which on its 20 kg bucket is up to 0.2 kg.
• Atlas Gemini RSX: 0.125 kg per 25 kg.

Can the wall freeze the night after rendering?

Not until the render has set completely, and Atlas puts that at 18 hours after application ends at the earliest. A last panel finished at 3pm needs the wall to stay above zero until 9am next day at the earliest.

Is it a render accelerator for Ceresit CT 74 or CT 174?

Atlas lists it only for its own renders. No Ceresit render is on that list, so a Ceresit job in cold weather is planned inside the temperature range printed on that render's own sheet.

Does it weaken the finished render?

Atlas states that it does not reduce the strength of the material or degrade its performance once set.

Is it worth adding when the air is above 80% humidity?

Yes, that is one of the two conditions it is made for, alongside temperatures from 0 °C to +10 °C. In extreme humidity setting can still run longer than 16 hours, so keep the scaffold sheeted until the surface has bound.

How long does a bottle keep?

18 months from the production date printed on the packaging.

Technical Documentation — Atlas Eskimo G

• Atlas Eskimo G technical data sheet (PDF)