Overcoat can be applied to a range of surfaces, depending on the substrate a primer will need to be applied before coating.
Compatible substrates
In most cases, Overcoat will not need a primer but some substrates will need one to create a permanent bond to the existing roof. Here is a list of existing surface substrates with the relevant primer required. If you have any questions please contact us.
| Substrate | Primer |
|---|---|
| Wood | Overcoat porosity primer |
| GRP | None required |
| Slate & Tiles | None required |
| Single Ply (PVC) | Overcoat porosity primer |
| Previously Painted | None required |
| Mild Steel | Overcoat porosity primer |
| Insulation Board Ply Faced | None required |
| Galvanising | None required |
| Felt | None required |
| Corroded Galvanising | Overcoat rust primer |
| Corroded Mild Steel | Overcoat rust primer |
| Concrete | Overcoat porosity primer |
| Bitumen | None required |
| Brick (dry) | None required |
| Aluminium | Overcoat porosity primer |
| Asbestos | Overcoat porosity primer |
| Asphalt | None required |