Britannia Aquashield Primer

Britannia Aquashield Primer



This roof primer from Britannia is ideal for porous roofs, and roofs which may break into smaller pieces if pressure is applied, such as concerete, asbestos cladding, sheeting and guttering. Will also prime fibre cement corrugated sheet.


  • Cures in 1 day
  • Waterproofs instantly
  • Solvent-based
  • 2-year shelf life
Bulk Buy

£30.62 tax excl.


£34.02 tax excl.

£36.74   tax incl.

Product Description

Britannia Aquashield Primer is great for friable roofs that need sealing and protecting, such as asbestos cladding. Whether your warehouse roof cladding needs protecting or the concrete roof on your office block needs waterproofing, this primer will act as the perfect base on which to apply the topcoat. Will also prime fibre cement corrugated sheet, but 2 coats will be required in this case.

Because Britannia Aquashield Primer is toxic to aquatic organisms, this product should not be used near fishponds.

Product Use in the Workplace

  • Library - If there's any building that can have its contents ruined by a leaking roof, it has to be a library. Even a small leak can cause a big problem; if water collects in one particular area of the roof, it has the potential to cause the ceiling to collapse, bringing a whole pool of water down all over the books.
  • Factory - Industrial roofs are usually hard-wearing, but like all roofing, needs to be well-maintained. In addition to not falling down, a good roof is one that keeps the rain and moisture out of the building. Once water can get in through the roof, it has the potential to cause erosion on metalwork, increasing the chance of damp and mould. By ensuring factory roofs are adequately waterproofed, safety can be upheld and damage can be avoided.

Features & Benefits

  • For use on highly friable/porous surfaces.
  • Solvent-based.
  • Cures in 1 day, but 2nd coat can be applied when touch dry.
  • Waterproofs instantly.
  • 2 year shelf-life.

Preparation & Application

Clear all areas of moss, lichen and debris by brushing or power washing and remove surface water and any contamination such as Oil or Grease and allow to dry. Apply Britannia Fungicidal Wash to prevent further fungal/algal growth. To the dry and cleaned surface, apply a coat of Britannia Aquashield primer by brush, roller or spray at the minimum specified spreading rate as stated above under the heading. Application Temperature should be between 5°C-25°C.

Stir well before use, and no not thin. Apply a generous coat of Britannia Aquashield Waterproof Roof Coatings at the minimum specified spreading rate as stated on the data sheet.

It is good practice to inspect and carry out adhesion tests on any existing coating or substrate prior to application of the coating.

When using this product it is important that a minimum finished fall of 1:80 is achieved, as stated in BS 6229.2003 (Code of Practice for the application of Liquid Applied Waterproofing Systems to flat roofs with continuously supported coverings).

It is your responsibility to read the Product Data Sheets (available below) before you place an order and prior to application of the product. The content of this website is our best recommendation and is not advice. Coverage rates quoted are approximate, you agree that coverage depends on the condition of the substrate, surface absorption, texture and application method. We ALWAYS recommend a trial area is coated to ensure the product meets your requirements before use.

Technical Data

Typical Coverage (per coat)0.2-0.33 lt/m2 (equivalent to 3-5 m2/lt) dependent on type/porosity of substrate.
Touch DryBritannia Aquashield Primer can take up to 1 day to cure but can be over coated when touch dry. Only apply Britannia Aquashield Waterproof Roof Coatings when the Primer is sufficiently dry to accept foot traffic.
ApplicationBrush, Roller, Spray
The figures stated above are approximate. Please ensure you refer to all datasheets for full application information.


Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.


questions Hardy on 03/12/2018

How much material primer and sealant will I need for a aspestos garage roof that measures six meters x two and a half meters and what would be the cost Thanks


When applying the Aquashield coatings to fibre cement/asbestos corrugated sheet we always recommend 'double priming' with Britannia Aquashield Primer. In this instance a popular finishing coat would be Britannia Aquashield High Build.

To apply 2 coats of Britannia Aquashield Primer followed by 1 coat of Britannia Aquashield High Build to 15m² you should require;

2 x 5lt Britannia Aquashield Primer
1 x 20kg Britannia Aquashield High Build

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