BBA Approved Metal Roof Coating System
Metalseal is BBA Approved, which means you can specify or use it with 100% confidence on your metal roofing refurbishment projects.
More than just a roof paint, the Metalseal system includes cut edge corrosion treatment as standard and a single-coat application is guaranteed for 25 years.
Metalseal has a semi-gloss finish and superior protctive qualities, making it the choice of many property professionals.
When you specify Metalseal for your industrial roof coating project, you get more than just paint, you get the expertise and attention of our own building surveying team.Â
Book an online or face-to-face meeting or CPD session with a director of Liquasil to learn more.
Metalseal BBA Certificate
Complete Metal Roof Refurbishment System
Steel profiled industrial roofs have a design life of up to 40 years, but if the original factory applied finish is damaged or degraded, the life expectancy is drastically reduced.
Over time, roof coatings suffer from UV exposure and mechanical damage that can result in complete failure, leaving the steel substrate susceptible to corrosion.
Liquasil’s Metal roof treatment is designed to provide long-term protection for metal roofs.
More affordable than a new roof or overcladding, Metalseal can be installed with little disruption to occupied buildings.
This purpose-made silicone roof coating system can be applied by brush, roller or airless spray usually in a single coat, making it quick and economical to install.
It’s 100% UV stable, so will not fade or degrade over time.
Metalseal is the ultimate protective coating for metal roofs in the UK and is the only one designed by Chartered Building Surveyors.
Unique Formulation
Made from the ground-up, Metalseal uses specially selected silicone oils and polymers to produce a coating that is purpose-made for the refurbishment of metal roofs.
BBA Approved under certificate number 18/5536 (sheet 1), Metalseal was the first specialist metal roof refurbishment system on the market to have this approval.
It’s also recommended by Kingspan, so you can specify and use it with 100% confidence.
During the past 10 years, Metalseal has been specified and installed on more than a million square metres of industrial metal roofs throughout the UK.
Metalseal provides a permanent protective finish to metal profiled roofs. It is resistant to UV degradation across all colours and won’t fade and crack over time.
Older installations of Metalseal can be easily cleaned with low pressure jet wash. Moss and lichen are a thing of the past because the product resists fungal growth.
Two Grades
Metalseal is available in two versions, to suit individual application methods.
Where brush and roller application is preferred, we recommend Metalaseal SF, our solvent free version of Metalseal that has more body, which helps reduce sagging of the product on crowns and webs of profiled steel.
Both versions can be applied by brush and roller, but a more consistent film thickness is achievable across the installation with Metalseal SF.
Metalseal SF cannot be sprayed.
For spray application, we recommend Metalseal 20, as it is formulated to suit airless spraying.
This version contains a small amount of solvent to ensure that the product atomises and can pass through the spray gun.
Cost of Coating A Metal Roof
Metalseal is cheaper to buy and to install, than many competing systems.
More than just a coating, the Metalseal system will refresh and protect your steel profiled roof in a single application.
When installed by a trained, approved installer, the Metalsaeal system is covered by a 25 year product guarantee.
Insurance backed guarantees may be available from your appointed Liquasil Approved Installer at extra cost.
Metalseal adds value for building owners at the lowest possible cost.
Brush Roller or Airless Spray Application
Ease of application is key to all Liquasil systems and Metalseal 20 can be installed by airless spray, roller or brush, usually in a single coat, so is suitable for use on small or large metal roofs.
For brush and roller application, we recommend Metalseal SF (Sobvent Free).
Both versions are available in any RAL colour, subject to a minimum roof size of just 300 sq metres at no extra cost.
Colour match guaranteed between batches.
Preparation of the roof will depend on the condition of the substrate to which the product is being applied and can be as simple as jet washing the surface.
If cut edge corrosion is present and the substrate is in poor condition, we recommend that the surface is taken back to bare metal (ST3 standard) and we recommend a number of economical methods for doing this and we are happy to provide guidance where necessary.
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FREQUENTLY ASKED QUESTIONS
What Is The Cost Of Metalseal?
Prices are provided by your chosen Liquasil Approved installer and will vary depending on a number of factors including, but not limited to; geographical location, roof size, roof complexity, condition of the roof, access arrangements and more.
How is Metalseal Applied?
Metalseal 20 can be applied by brush, roller or airless spray, but is manufactured as a spray grade product.
Metalseal SF is the solvent-free version that is suitable only for brush and roller application. The thicker consistency helps to reduce sagging of the product when applied to the crowns of metal roof profiles.
What Colours Are Available?
The standard Metalseal product is made in Goosewing Grey, since this is the most common metal roof coating colour in the UK.
However, we can custom-make Metalseal in any RAL colour.Â
Please allow at least 10 working days for the production of special colours.
Does Liquasil Inspect Projects?
Where Metalseal is specified on larger value roof coating projects, our staff will conduct a number of audits to check that the product is being installed in accordance with the specification.
If any issues are identified, these are discussed with the approved installer on site and then reported to them in writing, along with any remedial actions that might be required.
The site reports are for Liquasil and Approved Installer use only and are not provided to third parties.
Is Metalseal Guaranteed?
Metalseal has a 25 year product warranty when installed by a Liquasil Approved Installer.
This is a limited guarantee, since workmanship is specifically excluded.
We recommend that if a workmanship guarantee is required, that this is included in your specification document.
Are Additional Primers Required?
We try to keep the component parts of the Metalseal system as low as possible and in most cases, no primer is necessary, other than for treating cut edge corrosion as part of the project.
The following substrates are likely to require additional treatment:
- Bare galvanised
- PVDF / PVF2
- Aluminium
In any event, your approved installer will conduct suitable adherence tests prior to the coating being installed.
Will The Surface Remain Glossy?
The finish of Metalseal is semi-gloss. Over time the surface will appear to dull down, but this is actually environmental soiling and occurs with all roof coatings.
Metalseal can be cleaned easily with a low pressure jet wash and the appearance will come back to as it was when it was applied, though nobody does this with industrial steel roofs.
Are Roof Leaks Covered Under Warranty?
No, because Metalseal is a protective coating.Â
If your metal roof is leaking, it will be from one of any number of defects, including but not limited to:
- Defective roof light
- Missing or mis-aligned fixing(s)
- Missing or defective seals
- Incorrectly sealed flues or other details
- Defective seals on cladding capping details
- Gutters
The metal roof covering is already providing the waterproofing of a building, so unless there is a hole or split, water ingress issues have other causes.
Where Can I Purchase Metalseal?
Metalseal is available exclusively via our independent installer network.Â
This is to ensure that the product is applied correctly to provide a long lasting finish.
Can The Product Be Installed All Year Round?
Like most coatings, adhesion can be adversely affected by adverse weather conditions.
We do not recommend it is installed at temperatures below 5°c.
Higher temperatures will not affect the application of Metalseal SF, but could result in the premature solvent release of Metalseal 20 if applied to a surface with a temperature of greater than 40°c.
Is Metalseal A Waterproofing System?
No. Metalseal is a protective coating designed for the refurbishment of degraded metal roofs.
The waterproofing element is the roof substrate itself.
Additional components can be added to the standard system to reduce the chance of water ingress, but most often, metal roof leaks are the result of other defects that are present.
How Long Does A Metalseal Installation Take?
This depends on the size and complexity of the roof and how many people are involved with the installation.
A very experienced spraying team comprising a sprayer and a labourer, can achieve up to 1000 sq metres in a single day during the summer.
In winter, the timescales are extended due to reduced daylight hours, possibility of inclement weather and lower temperatures.
Brush and roller application is slower, but often made up for with larger installation teams.
How Many Coats Are Required?
Metalseal is a single coat application in most cases.
There may be occasions where an additional coat is necessary due to local conditions, but this is rare.
Occasionally, an installer will apply an initial mist coat before application of the main coat in order to iron out any surface imperfections. This does not use more product than usual.
How Is The Roof Cleaned Before Coating?
There are a number of cleaning methods available to installers, but most commonly metal roofs are cleaned using pressure washers.
Does Metalseal Require Any Maintenance?
It’s good practice to inspect roofs on an annual basis and this is true of coated steel roofs.
If any damage to the coating is noted during an inspection, then it’s an easy process to clean down the affected area and overcoat with Metalseal.
There is no mandatory maintenance requirement other than this.
Environmental soiling should not adversely affect the metal roof coating in most conditions.
Can A Peeling Metal Roof Coating Be Over-Coated?
It is very common to see the original metal roof finish peeling back and leaving large areas of bare galvanised steel.
When this happens, before the roof is re-coated, all of the existing, failing finish must be removed as far as is reasonably practicable.
The reason for this is that the original finish will continue to come away even after it has been overcoated.
Over-coating a failing finish does not stick it back down and the new coating will fail – regardless of manufacturer.
ADDITIONAL PRIMERS & TREATMENTS
*Galvanised Surfaces
A bare galvanised roof that has been cleaned can still contain an invisible layer of zinc that can hinder adhesion of new coatings.
Galvanised surfaces should be treated with a mordant solution, that should be rinsed off once activated.
This will help ensure project is successful and will also enhance the life expectancy of the installation.
Alternatively, Liquasil has a galv primer available for use on larger areas.
PVDF / PVF2 Coated Surfaces
Identifiable by its hard and smooth finish, PVF coated steel is notoriously difficult to overcoat.
The reason is that PVF contains Flourine which is used in the manufacture of many non-slip or non-stick coatings.
Liquasil has two dedicated PVF primers for use on PVF coated surfaces that ensures successful and long-term adhesion.
One is a two-pack epoxy and the other is a sprayable single pack product.
Cleaning Metalseal
Metalseal is a soft coating that can be damaged by impact, abrasion or harsh jet washing.
Coated surfaces can be cleaned using low pressure jet wash, holding the lance at least 12 inches from the surface of the coating. Turbo lances must NOT be used.
Alternatively, smaller roofs can be cleaned using washing-up liquid and water, agitating the surface with a sponge or soft bristle car washing brush and then rinsing with clean water.
It is not a requirement of Liquasil’s product warranty that the surface is cleaned regularly, but it is a requirement that the installation is examined annually for signs of damage, which if present, can be touched up with more product once the surface has been cleaned.
Liquasil can also provide a compatible anti-fungicidal wash to kill any fungal growth that might be present on the surface.
Our friendly building surveyors are here to help.
Please call us on 0121 709 5352 and speak to the most helpful team in coatings!