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Johnstone's Trade Aqua Water Based Undercoat Brilliant White

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For a flawless finish ready for your chosen topcoat, apply using a synthetic brush.

Johnstone's Trade Aqua Undercoat is an innovative, water-based undercoat ideal for interior and exterior wood and metals. It looks, feels, and applies like a traditional undercoat but is quick-drying - reducing application time. Designed for use under the Johnstone's Trade Aqua Water Based Gloss or Satin for best results but also suitable for use under other water-based paints. A low odour, low VOC solution. 

Applying Johnstone's Trade Aqua Undercoat 

For best results apply to a clean, dry surface using a synthetic brush. Avoid overspreading.

Johnstone's Trade Aqua Undercoat Overview

  • Quick drying
  • Easy to apply
  • Suitable for interior and exterior wood and metal surfaces
  • Low odour
  • Low VOC
  • C&C disabled No
  • Weight 1.000000
  • Application Method Brush, Roller, Sprayer
  • Product Application Brush, Roller or Airless Spray
  • Coverage 10-12sqm per litre
  • Touch Dry 1-2 Hours
  • Recoatable 4-6 Hours
  • Thinning Water
  • Number of Coats 2
  • QTY in Pack 1 Pack
  • Surface Interior Wood, Exterior Wood, Metal
  • Water or Oil Water Based
Customer Questions
Is the aqua system 100%water based
No, the Johnstone's Trade Aqua Water Based Undercoat contains 8% oil. 
Can you paint this undercoat over sanded previous oil based paint.
We wouldn't recommend it, for best results continue with an oil based product or strip the wood fully before using the Aqua undercoat.
Can I use it on fence then paint over it with fence paint

We would recommend that you apply Johnstone's Trade Joncryl Primer before painting over with fence paint as the Aqua undercoat is best before applying Aqua paint.

How long is drying time before you can apply first coat
Johnstone's Trade Aqua Water Based Undercoat White is ready for recoat or the first coat of paint after 4-6 hours to allow for full drying.
Can I use this as MDF primer

No, we recommend Johnstone's Trade Joncryl Primer for MDF or a specific MDF primer instead.

Can you paint Johnstone's Trade Aqua Water Based Undercoat on glass?

Yes, you can apply Johnstone's Trade Aqua Water Based Undercoat to glass but only after a coat of Zinsser Bulls Eye first to ensure adhesion.

Would Johnstone's Trade Aqua Water-Based Undercoat be suitable for a radiator?
Johnstone's Trade Aqua Water-Based Undercoat is suitable for radiators.
Will Johnstone's Trade Aqua Water Based Undercoat cover nicotine stains?

Johnstone's Trade Aqua Water Based Undercoat won't cover the nicotine stains alone, we would recommend using a stain-specific primer like Zinsser Cover Stain first to ensure full coverage.

Can you spray Aqua water based undercoat . If so what do you use as a thinner . How much do you thin it by ?
Yes, you can spray Aqua Water Based Undercoat safely and for best results thin using clean water by no more than 10%.
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