Felt
No primer neededClean off loose material and seal any joints or cracks with Sharkseal. Overcoat then applies directly, no primer or reinforcement.
Coverage~1.2 kg/m²
Watertight~30 min
The ultimate liquid roofing system that covers it all
From a quick repair to a whole new surface, Overcoat is one flexible, atmospheric-cure resin that does the lot. Watertight in around 30 minutes, on almost any substrate.
Repair, refurbish or recover any roof
See what it coversBonds to almost any roofing surface
Check your surfaceWatertight in around 30 minutes
See the surfacesBacked for up to 10 years
About the guaranteeOne system, three jobs
Far more than a patch. The same resin scales from an emergency repair to a complete new surface.
Most liquid coatings fix a leak and stop there. Overcoat is engineered to carry the full job, so the same tin handles the small stuff and the whole roof alike, on almost any substrate.
Stop the leak
Seal cracks, splits, gutters, valleys, joints and seams. Touch-dry and watertight fast, with no primer needed in most cases.
Extend the life
Recover a tired but sound roof with a continuous, UV-stable membrane, applied straight over the existing surface with no strip-out.
Waterproof the whole roof
Coat entire roofs across mixed substrates, new or existing, in one consistent system with eFlex movement tolerance built in.
Where it works
Almost any surface. From felt and asphalt to metal, asbestos and timber.
Overcoat bonds to virtually any roofing substrate. Some need a quick coat of Base Primer first, many need nothing at all. Browse the surfaces to see how each one goes on.
Asphalt
No primer neededMake sure the surface is sound, clean and dry. Treat blisters or cracks first, then coat directly across the area.
Coverage~1.2 kg/m²
Watertight~30 min
Concrete
Base PrimerMake sure the surface is sound, clean and dry. Porous or dusty concrete is sealed with Base Primer before Overcoat goes on.
Coverage~1.2 kg/m²
Watertight~30 min
Metal
Base PrimerDegrease and abrade for a clean key. Prime bare or coated metal with Base Primer, then apply Overcoat over the top.
Coverage~1.2 kg/m²
Watertight~30 min
Single ply
Base PrimerClean the membrane and prime with Base Primer for a reliable bond, then overcoat the sheet and its seams.
Coverage~1.2 kg/m²
Watertight~30 min
Asbestos
Base PrimerEncapsulate sound asbestos sheet without disturbing it. Prime with Base Primer, then seal the surface with Overcoat.
Coverage~1.2 kg/m²
Watertight~30 min
Rubber EPDM
Base PrimerClean the membrane and prime with Base Primer to key the rubber, then apply Overcoat for a continuous finish.
Coverage~1.2 kg/m²
Watertight~30 min
Fibreglass / GRP
Base PrimerAbrade the existing laminate and prime with Base Primer. Overcoat then recoats and recolours tired GRP, no strip-out.
Coverage~1.2 kg/m²
Watertight~30 min
Lead
No primer neededClean back to a sound surface. Overcoat reseals tired lead and the joints around it, no primer needed.
Coverage~1.2 kg/m²
Watertight~30 min
Wood / OSB
No primer neededEnsure the boards are dry and secure. Overcoat bonds straight to OSB and timber for a watertight deck.
Coverage~1.2 kg/m²
Watertight~30 min
Finishing colours
The Overcoat of many colours. Merlin Grey as standard, with over twenty BS and RAL finishes.
Overcoat finishes the roof as well as waterproofing it. Choose the standard Merlin Grey or pick a colour to match the building.
Merlin Grey
BS 12 B 25
Albatross
BS 12 B 25
Anthracite
RAL 7016
Buttermilk
BS 10 C 31
Goosewing Grey
RAL 7038
Grey White
RAL 9002
Iron Grey
RAL 7011
Jade Green
BS 14 C 37
Juniper Green
BS 12 B 29
Leaf Green
RAL 6002
Green Mist
BS 12 B 17
Moorland Green
BS 12 B 21
Mushroom
BS 10 B 19
Ocean Blue
BS 18 C 19
Olive Green
BS 12 B 27
Platinum Grey
RAL 7036
Slate Blue
BS 18 B 29
Sargasso
RAL 5003
Jet Black
RAL 9005
Signal Grey
RAL 7004
Tele Grey
RAL 7047
Terracotta
BS 04 C 39
Van Dyke Brown
BS 08 B 29
Wedge Blue
RAL 5015
Standard finish.Colour finishes come in the 21kg size and take 3 to 5 working days. Swatches are a guide; request a sample to confirm the shade.
The complete system
Not just a tin. Overcoat is a full system of components that work together.
From the coating itself to the primers, sealers and detailing that go with it, every part is specified to work as one system. Explore each component below.
Component A
The main coating. One-line role of this component to be confirmed.
View component →Component B
Joint and detail sealer. Confirm name and role.
View component →Component C
Surface primer. Confirm name, role and which surfaces.
View component →Component D
Reinforcement layer. Confirm name and where it is used.
View component →Component E
Edge and detail trims. Confirm range.
View component →Component F
Guarantee or aftercare product. Confirm name and terms.
View component →Peace of mind
Backed for up to 10 years. A long-term guarantee on a system built to last.
Applied as specified, Overcoat is covered by a guarantee of up to ten years, so the roof stays protected long after the job is done.
Up to 10-year cover
The headline guarantee length is retained; confirm exact duration and what it covers.
Confirm termsRegistered guarantee
Confirm whether the guarantee is registered, how it is issued, and whether it is transferable.
Confirm termsBacked by aftercare
Confirm the aftercare/maintenance product and how it supports the guarantee over time.
Confirm termsReady to start?
Create an account to browse and specify, or schedule a consultation to talk through your project with one of our specialists.
Schedule a consultation
Arrange a phone call with a specialist to discuss your application.
Choose a time