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Deep Penetrating Primer (EWI-302) – 5 Litres

Brand:EWI Pro

£20.99 Excl. VAT

  • Ideal for new-build brick and blockwork
  • Internal & external use
  • Can be used with heritage products
  • Ready-to-use, no need to dilute

EWI-302 Deep Penetrating Primer

EWI- 302 Deep Penetrating Primer is a substrate preparation product, used for priming new build external walls prior to the application of renders or mortars. This product is suitable for stabilising various different absorptive substrates, particularly new-build brick and blockwork, ordinary/cellular concrete (e.g. aerated concrete), walls made of bricks, blocks and structural clay tiles, plaster coats, gypsum panels and gypsum plasterboards.

It is the perfect primer to use to stabilise walls on heritage building both internally and externally prior to the application of the render and finishing products.


EWI-302 comes ready to use in 5 litre jerrycans. The product should be mixed within its container before use. It should not be diluted with water or any other material.


For best effects, do not add water and apply using a brush or roller. Weak substrates that need to be strengthened and highly absorptive substrates should re-primed after about 4 hours. Dispersion paints, surface finish products or adhesives should be applied after at least 24 h since priming. Works must not be carried during rain or snow, strong winds and in direct sunlight, without special protection to limit exposure to weather conditions. Recently rendered coats must be protected against rain, frost and over-rapid drying.

Deep Penetrating Primer Application Conditions

  • Application temperature (air, substrate, materials): from +5°C to +25°C
  • Quantity to be used: approx. 50-300 ml/mdepending on substrate structure and absorptive capacity)
  • Coat drying time: approx. 2-4 hours
  • Time to painting or plastering: after about 24 h after priming
  • Colour: colourless when dry

Deep Penetrating Primer Storage Conditions

EWI-302 Deep Penetrating Primer is available in 5-litre plastic jerrycans.

Shelf life: up to 12 months from the date of manufacture. Keep dry and in the original packaging at a temperature of +5°C to +25°C.

Frequently Asked Question

  1.       What is Deep Penetrating Primer used for?

Deep Penetrating Primer is a substrate preparation product, used for priming new build external walls before the application of renders or mortars.

  1.       Can I use Deep Penetrating Primer on heritage buildings?

Deep Penetrating Primer is the ideal primer to use to stabilise walls on heritage buildings. 

  1.       How long does it take for Deep Penetrating Primer to dry?

Universal Primer takes approximately 2-4 hours to dry and should only be used in a temperature range of +5°C to +25°C. You should wait up to 24 hours before carrying out additional work.

  1.       What colour does Deep Penetrating Primer dry?

Deep Penetrating Primer will dry completely colourless onto the substrate.

  1.       Can Deep Penetrating Primer be used both internally and externally?

Deep Penetrating Primer can be used both internally and externally.



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