I have an old 1960s garage with corrugated concrete/asbestos roof. what would be the best product to seal this ? its is approx 16m2

Assuming it is a flat concrete roof, with a corrugated pitch,that is prepared as detailed in the technical datasheet, Britannia Aquashield High Build will be OK to apply as a finish coat. We would firstly recommend priming with Britannia Aquashield Primer , 2 coats should be sufficient, before a full coat of Britannia Aquashield High Build to finish. With 3-5m2 per litre, 5kg of Primer should be sufficent, and based on 1-2kg per m2 dependent on the substrate, a 20KG pack of Britannia Aquashield High Build will cover 16m2 sufficiently.

Can Brittania Aquashield be used on high density polyethylene. Thanks Geoff Carr

Unfortunately no, this product is not suitable for this type of application as it will not adhere to the substrate.

Can I use aquashield high build on a lead valley? Thanks

Unfortunately no, for application to lead assuming it is clean, dry, sound and prepared as detailed in the technical data sheet we can recommend Britannia Durashield . This can be applied directly to old lead.

Can I apply a second coat of Aquashield high-build? (The first coat is a bit patchy- I probably didn't put it on thick enough)

Yes a second coat can be applied assuming the substrate is clean, dry and sound.

Do I have to use a primer on a fibreglass (GRP) roof?

No, assuming the GRP roof is clean, dry, sound and prepared as detailed in the technical data sheet this can be applied without a primer.

Hi. I have a bitumen flat roof, it is good condition, however last year I noted thin cracks where appearing along the joint lines and as it is in full sun all day and I wanted to prolong its life I painted it with your Blackfriar Solar reflective paint. Having checked it this year its evident the cracking is again evident and I now thinking the Britannia Aquashield High Build, in solar white, would have been a more suitable product? can I apply this over the Blackfriars?

Please download the Product Data Sheet from the 'Attachments' tab on the Britannia Aquashield High Build product page. This details application to existing coatings and what to do on cracking areas. Should you require any further information please contact our Technical Team on 0113 2455450 (option 2) or email technical@rawlinspaints.com

My lead clad bay window window flat roof approx 2.5m x1m has developed a small leak creating a disclouration on the ceiling below approx 10cm x 5 cm. Needless to say I cannot find the cause despite careful examination! The roof albeit old is generally in good condition. Rather than having a completely new lead roof I am considering painting with a waterproofing paint. Which - if any - of your products would you recommend? Many thanks for your help Regards Graham Pye Can you please

The Britannia Durashield system would be our recommendation for aged lead surfaces.

Hi. I have just had a bitumen flat roof recovered with a torch on mineral felt. Is there anyhing I can paint onto it to prolong it's life.One part of the roof gets a lot of sun and approx 1/2 of it is in the shade and suffers from a lot of moss.

Britannia Aquashield High Build could be used for this in Solar Reflective White, discolouration may occur over a new asphalt, tar or bitumen surfaces; therefore an extra coat may be required, for decorative purposes only.

I have a Garage that I erected myself about 2 years ago since then I have noting but problems with leaks. I tried all sorts of remedy's. My thinking is now to completely cover the whole roof with something. My garage is 17.7 sq mt Can you please advise me of a product that would do this your sincerely G Corns

You haven't said what your roof is - i.e. felt, metal, asbestos, etc. however if it is a substrate that Britannia Aquashield High Build can be applied to as per the product data sheet then this would be a good potential choice.

Hi am looking for white waterproofing paint for the top of my land-rover defender 110 would this work. Many thanks John

We're assuming the surfaces you wish to paint are metal, if so Britannia Aquashield High Build can be used on metal surfaces. Be sure to download and read the product data sheet from the product page for full details on preparing and priming metal.

Hello, I have a polycarbonate conservatory roof which has flash banding on some parts. Can I use your aqua shield solar paint on these materials assuming they are clean and dry? Thank you in advance for your assistance.

We would recommend Britannia Aquashield Eco for this application.

I have a gutter between the 2 seperate pitched rooves of my house. Most is lead coated but the last and lowest 3 metres has been painted with something similar to your product but old and leaking slightly somewhere. Can I just clean, dry and paint over the leaky area with your product or will the old stuff need scraping off completely and starting again? Thanks.

Ideally we would recommend removing the existing coating to reveal the leaking area to enable you to prime, reinforce and coat the area as needed. If however this is not possible then as long as the existing coating is sound, well adhered and compatible then after cleaning Britannia Aquashield High Build could be applied directly.

Hello, I have a workshop that has a corrugated metal roof some of which is in less than perfect condition, it would be difficult to remove and replace the roof and I am looking at alternative means of waterproofing it. Some of your products look as if they might be suitable, are you able to recommend any thing that might help. regards Michael Johns

After cleaning, assuming it is bare, weathered galvanised steel we would recommend first priming with Britannia One Pack Etch Primer before application of Britannia Aquashield High Build.

Britannia Aquashield High Build

Reference WPRC3070

Brand Britannia

Search ID BRI3070

A solvent-based, instantly waterproofing coating for exterior pitched or flat roofs, bitumen, asbestos cladding, metal, fibreglass roofs and more.

Contains added fibres that interlace to cover up small gaps or cracks in the substrate.
Rainfall immediately after application has no adverse effect
Can be applied by brush or roller

Colour

Black
Grey
Solar Reflective White

Size

£41.99(incl. VAT)

£34.99(ex. VAT)

Quantity

Please choose your colour

Available for Delivery (See Delivery Options Below)

ColourPicker Explained

In general we sort colours for products into 2 main groups - ‘Ready Mixed’ and ‘Tinted’.
Tinted colours will always be more expensive than Ready Mixed colours as they need to be produced at the time of order using a tinting machine dispensing colourant into a base*.
During busy periods, this means that tinted colours could take longer, for example – a ready mixed colour ordered on a 3-5 day delivery might arrive within 3 days, however a tinted colour might take the full 5 days to arrive.

To find Ready Mixed colours, search "ready mixed" or select the Ready Mixed 'colour chart'. To see Tinted colours select a colour chart such as RAL, BS, NCS, etc. or search for a colour/hue to see available or related options.

To ensure fair pricing, we split colours into ‘Price Bands’ to group together similar priced colours. If you wish to search for the cheapest tinted colours, always select Price Band 1.

We make every effort to list all available colours, however we also offer a colour match service which can be accessed by contacting our Technical Team on 0113 245 5450 (option 2) or emailing [email protected]

*Colours are sold in the nearest tin size but actual paint volume per tin may vary up to 10% depending on colour

Colour reproduction of the Products on the Site is limited by the technology used to deliver web pages and by the colour representation of Customer’s own monitor and computer set-up. We have made every effort to display as accurately as possible the colours of our Products but we cannot guarantee that the colour shown on Customer’s monitor’s display will accurately reflect the colour of the Product on delivery. We recommend that Customer first purchases the smallest Product available or access an industry standard colour chart in person (and not digitally) to ensure that the colour is acceptable for its purposes.

13 questions about the product

Description

Britannia Aquashield High Build is a solvent-based waterproofing coat for exterior pitched or flat roofs. The product contains embedded fibres which will will cover up any small gaps and cracks.

Ideal for bitumen, metal, fibreglass, porous and non-porous roofs, including iron, steel, slate, polished brick, concrete and asbestos cladding.

Features & Benefits

Works instantly
Solvent based
Rainfall immediately after application has no adverse effect
Can be brush or roller applied
Particularly suitable for general maintenance work
Contains added fibres that interlace to cover up small gaps or cracks

Spreading Rate

These will vary depending on substrate, the site conditions and longevity required.

Typically spreading rates will vary depending on the end use.

Between 1 kg – 2 kg per square metre dependent on substrate
Should be applied at 5°C-25°C

Drying Times

Up to 6-7 days depending on temperature and thickness of coating
The product may remain soft for a further period depending on climatic conditions, this is not detrimental to the waterproofing qualities of the product

Not suitable for heavy foot-traffic areas.

Preparation

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.

Most roofing substrates to be treated will not normally require priming.

Highly porous/friable surfaces:

These Surfaces must be jet washed prior to applying the Britannia Aquashield Primer
Concrete, Concrete and Asbestos Cladding, Sheeting and Guttering should be primed with Britannia Aquashield Primer (see separate technical sheet) prior to over coating with Britannia Aquashield Waterproof Roof Coating
Fibrous cement corrugated sheeting: two coats of Aquashield Primer must always be applied to this substrate

Metal Surfaces:

Including:

Ferrous-new, weathered and previously painted galvanised iron and steel
Non-Ferrous Metals - Aluminium sheeting & Aluminium Alloy Box gutters and previously painted non-ferrous metals

All these areas should be suitably prepared and primed as appropriate (see separate technical sheet) before application of Britannia Aquashield Waterproof Roof Coating.

Non-porous substrates:

Slate, polished bricks should be power washed abraded and completely dry, free from any contamination to achieve adhesion of the Britannia Aquashield Waterproof Roof Coating

Bitumen surfaces:

Discolouration may occur over a new asphalt, tar or bitumen surfaces; therefore an extra coat may be required, for decorative purposes only. Aged bitumen can be liable to crack, therefore further advice must be taken

Previously painted or coated substrates:

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

Splits, cracks, joints and seals, crazed areas:

Pay particular attention to clean out any splits/cracks/joints and seals by scraping or brushing off with a stiff bristle brush before applying the Britannia Aquashield Primer. Repair all faults in the surface by using a proprietary filler.

Surface faults:

Repair all faults in the surface with either Britannia’s Reinforcing Scrim in the first of two coats or using a proprietary filler

In areas where excessive movement may occur, additional reinforcement must be incorporated into the coating.

Application

To the dry and cleaned surface, apply a generous coat of Britannia Aquashield Waterproof Roof Coating by brush, squeegee
Please follow the Coverage rates shown in Spreading Rate Section
Apply between 5°C - 25°C
As dictated by normal good painting practice. In confined spaces, provide adequate ventilation during the application and drying

Cleaning

For all cleaning use white spirit

Shelf Life & Storage

Up to 2 years if stored correctly in an unopened container
Store in a safe place in accordance with the instructions in section 7 of the relevant MSDS sheet

Precautions

Flammable keep away from sources of ignition
Ensure good ventilation during application
Wear gloves, goggles and suitable protective clothing
Over occupied premises during insulation of coatings we would advise keeping windows closed
In case of contact with eyes rinse immediately with plenty of water and seek medical advice
Remove splashes from the skin with a recognised hand cleaner or plenty of soap and water
Keep out of reach of children
Do not use near fishponds
Harmful to aquatic organisms. May cause long term adverse effects in the aquatic environments
Do not empty into drains

Product Details

Reference 3070-418090

Data sheet

Manufacturer: Britannia
Interior / Exterior Use: Exterior Use
For Use On: Iron, Steel, Brick, Concrete, Asbestos, Bitumen, Fibreglass
Application Method: Brush, Squeegee
Colour: Standard / Ready Mixed
Single, Two or Three Pack: Single
Pack Size: 1KG, 2.5KG, 5KG, 20KG
Coverage: 1-2kg per square metre, dependant on the substrate.
Touch Dry: Up to 6-7 days depending on temperature, thickness of coating. The product may remain soft for a further period depending on climatic conditions, this is not detrimental to the waterproofing qualities of the product.
UN Number: UN1263
Base Type: Solvent-Based
Suitable For Use On: Iron
Suitable For Use On: Bitumen
Suitable For Use On: Concrete
Suitable For Use On: Brick
Suitable For Use On: Steel
Suitable For Use On: Asbestos
Suitable For Use On: Fibreglass
Application Method: Brush
Application Method: Squeegee
Usages: Waterproofing
Usages: Solar Reflective
Product Usage Type: Topcoat
Product Range: Aquashield
Colour Family: Grey
Colour Family: Black
Colour Family: White

Attachments

Download

Product Data Sheet

Download

Safety Data sheet

Download

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

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Guy Williams on 2024-01-19 12:24:09	Question: I have an old 1960s garage with corrugated concrete/asbestos roof. what would be the best product to seal this ? its is approx 16m2
	Answer from Rawlins’ Technical Team: Assuming it is a flat concrete roof, with a corrugated pitch,that is prepared as detailed in the technical datasheet, Britannia Aquashield High Build will be OK to apply as a finish coat. We would firstly recommend priming with Britannia Aquashield Primer, 2 coats should be sufficient, before a full coat of Britannia Aquashield High Build to finish. With 3-5m2 per litre, 5kg of Primer should be sufficent, and based on 1-2kg per m2 dependent on the substrate, a 20KG pack of Britannia Aquashield High Build will cover 16m2 sufficiently.

Geoff Carr on 2023-10-17 11:57:39	Question: Can Brittania Aquashield be used on high density polyethylene. Thanks Geoff Carr
	Answer from Rawlins’ Technical Team: Unfortunately no, this product is not suitable for this type of application as it will not adhere to the substrate.

Phil manners on 2022-11-23 12:00:12	Question: Can I use aquashield high build on a lead valley? Thanks
	Answer from Rawlins’ Technical Team: Unfortunately no, for application to lead assuming it is clean, dry, sound and prepared as detailed in the technical data sheet we can recommend Britannia Durashield. This can be applied directly to old lead.

Richard Davies on 2022-04-18 15:05:59	Question: Can I apply a second coat of Aquashield high-build? (The first coat is a bit patchy- I probably didn't put it on thick enough)
	Answer from Rawlins’ Technical Team: Yes a second coat can be applied assuming the substrate is clean, dry and sound.

Richard Davies on 2022-03-25 12:37:41	Question: Do I have to use a primer on a fibreglass (GRP) roof?
	Answer from Rawlins’ Technical Team: No, assuming the GRP roof is clean, dry, sound and prepared as detailed in the technical data sheet this can be applied without a primer.

Raymond James Morrison on 2019-07-20 15:50:25	Question: Hi. I have a bitumen flat roof, it is good condition, however last year I noted thin cracks where appearing along the joint lines and as it is in full sun all day and I wanted to prolong its life I painted it with your Blackfriar Solar reflective paint. Having checked it this year its evident the cracking is again evident and I now thinking the Britannia Aquashield High Build, in solar white, would have been a more suitable product? can I apply this over the Blackfriars?
	Answer from Rawlins’ Technical Team: Please download the Product Data Sheet from the 'Attachments' tab on the Britannia Aquashield High Build product page. This details application to existing coatings and what to do on cracking areas. Should you require any further information please contact our Technical Team on 0113 2455450 (option 2) or email [email protected]

Graham Pye on 2019-03-26 10:39:31	Question: My lead clad bay window window flat roof approx 2.5m x1m has developed a small leak creating a disclouration on the ceiling below approx 10cm x 5 cm. Needless to say I cannot find the cause despite careful examination! The roof albeit old is generally in good condition. Rather than having a completely new lead roof I am considering painting with a waterproofing paint. Which - if any - of your products would you recommend? Many thanks for your help Regards Graham Pye Can you please
	Answer from Rawlins’ Technical Team: The Britannia Durashield system would be our recommendation for aged lead surfaces.

patrick on 2019-02-22 13:36:44	Question: Hi. I have just had a bitumen flat roof recovered with a torch on mineral felt. Is there anyhing I can paint onto it to prolong it's life.One part of the roof gets a lot of sun and approx 1/2 of it is in the shade and suffers from a lot of moss.
	Answer from Rawlins’ Technical Team: Britannia Aquashield High Build could be used for this in Solar Reflective White, discolouration may occur over a new asphalt, tar or bitumen surfaces; therefore an extra coat may be required, for decorative purposes only.

gerald corns on 2019-02-11 15:10:25	Question: I have a Garage that I erected myself about 2 years ago since then I have noting but problems with leaks. I tried all sorts of remedy's. My thinking is now to completely cover the whole roof with something. My garage is 17.7 sq mt Can you please advise me of a product that would do this your sincerely G Corns
	Answer from Rawlins’ Technical Team: You haven't said what your roof is - i.e. felt, metal, asbestos, etc. however if it is a substrate that Britannia Aquashield High Build can be applied to as per the product data sheet then this would be a good potential choice.

Jobn on 2019-02-04 07:42:18	Question: Hi am looking for white waterproofing paint for the top of my land-rover defender 110 would this work. Many thanks John
	Answer from Rawlins’ Technical Team: We're assuming the surfaces you wish to paint are metal, if so Britannia Aquashield High Build can be used on metal surfaces. Be sure to download and read the product data sheet from the product page for full details on preparing and priming metal.

Daniel Needham on 2018-12-13 22:31:55	Question: Hello, I have a polycarbonate conservatory roof which has flash banding on some parts. Can I use your aqua shield solar paint on these materials assuming they are clean and dry? Thank you in advance for your assistance.
	Answer from Rawlins’ Technical Team: We would recommend Britannia Aquashield Eco for this application.

Ryan Russell on 2018-12-09 22:48:20	Question: I have a gutter between the 2 seperate pitched rooves of my house. Most is lead coated but the last and lowest 3 metres has been painted with something similar to your product but old and leaking slightly somewhere. Can I just clean, dry and paint over the leaky area with your product or will the old stuff need scraping off completely and starting again? Thanks.
	Answer from Rawlins’ Technical Team: Ideally we would recommend removing the existing coating to reveal the leaking area to enable you to prime, reinforce and coat the area as needed. If however this is not possible then as long as the existing coating is sound, well adhered and compatible then after cleaning Britannia Aquashield High Build could be applied directly.

Michael Johns on 2018-12-06 16:21:41	Question: Hello, I have a workshop that has a corrugated metal roof some of which is in less than perfect condition, it would be difficult to remove and replace the roof and I am looking at alternative means of waterproofing it. Some of your products look as if they might be suitable, are you able to recommend any thing that might help. regards Michael Johns
	Answer from Rawlins’ Technical Team: After cleaning, assuming it is bare, weathered galvanised steel we would recommend first priming with Britannia One Pack Etch Primer before application of Britannia Aquashield High Build.

IMPORTANT SHIPPING & DELIVERY INFORMATION

Britannia Aquashield High Build is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.

Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.

Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.

All delivery costs below are excluding VAT

Britannia Aquashield Primer

Britannia Aquashield Primer is a solvent based primer for very porous and loose/friable surfaces. It ensures the Aquashield topcoat delivers optimum waterproofing performance. Works instantly Vital stabilisation of highly friable/porous surfaces Rainfall immediately after application has no adverse effect Can be brush, roller or spray...

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Britannia Fungicidal Wash Solution

A water-based solution which controls and treats fungal and algal growth prior to painting external hard services. For external hard surfaces such as tiled roofs, walls, timber decking, block paving and cladding. Water based - Easy, quick and safe to use. Powerful, proven water based solution for external hard surfaces. Specially...

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Britannia Reinforcing Scrim

Britannia Reinforcing Scrim is a polyester-based mesh that can be used to reinforce the following: roof fixings, cracks, splits, holes and joints in asbestos gutters and sheeting, rooflights, metal, bituminous felts/coatings and asphalt surfaces, felted surfaces, single ply and fibreglass roofs and wood. Used as a reinforcement with...

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IMPORTANT SHIPPING & DELIVERY INFORMATION

Britannia Aquashield Primer

Britannia Fungicidal Wash Solution

Britannia Reinforcing Scrim