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Render Accelerator (EWI-020) – 100ml

Brand:EWI Pro
(2 customer reviews)

£5.60 Excl. VAT£6.92 Excl. VAT

  • Accelerates the curing time of the coloured-through textured renders, enabling the faster completion of jobs
  • Can cut render drying times in half
  • Perfect for rendering in colder weather, from 1°C to +12°C
  • No negative affect on the appearance of the dried render


EWI-020 Render Accelerator

EWI-020 Render Accelerator is a high-quality liquid additive that can be used to accelerate the curing process of Silicone or Acrylic renders.. If you live in a colder climate, where the drying process takes a long time, this product is a worthwhile investment. It allows installers to continue to install thin-coat render systems throughout the winter months. EWI-020 works to speed up this curing process, allowing for faster job completion rate.

This product is suitable for colour-through textured renders and has no negative effect on their appearance.


Before applying the EWI-020 Render Accelerator, it is important to take appropriate Health & Safety measures.

EWI-020 should be poured directly into a bucket of our render. Thorough mixing with a plaster mixer is needed to reach a good, workable consistency. Mix 100ml of EWI-020 for every 25Kg bucket of render. Do not add water to the render.

It is recommended to follow the product data sheet and manufacturer’s instructions for working conditions and restrictions.

Safety Measures

Avoid skin contact and protect the eyes. In case of eye contact, wash the eyes abundantly with clean water and seek medical assistance. The use of gloves, goggles and protective clothing is recommended.


  • Shelf life: up to 12 months from the date of manufacture.
  • Store in a cool and dry place in original packaging.

Frequently Asked Questions

  • What does Render Accelerator do?

Render Accelerator is a liquid additive used to accelerate the curing process of silicone or acrylic renders by up to 50%.

  • How much Render Accelerator do I need to use per bucket?

You only need to mix 100ml of EWI-020 for every 25 kg bucket of render.

  • Can I use multiple bottles in one bucket?

No, multiple bottles will not speed up curing time any further. 

  • Will Render Accelerator change the appearance of my render colour?

Render Accelerator has no negative effect on the appearance of the dried render.

2 reviews for Render Accelerator (EWI-020) – 100ml

  1. Chris

    Expensive but helped our Silicone render go off in cold November. Worth it.

  2. Wes Plant

    Render accelerator is mint. We mixed 6 tubs this morning, 4 with additive and 2 no additive as the sun was on 1 panel so no additive, so the 4 tub panel was in the shade no sun at all and 6-8 degress max, when we left panel in sun for approx 1 hour direct sun still not dry, rear panel no sun at all but with additive touch dry.

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