The reality is that a good coating/paint product will fail if it’s not applied correctly. What needs to be understood is that an old, rough, porous concrete roof tile requires a different form of coating/paint application than say a tile that is not very old, with the existing colour still evident.
Concrete roof tiles generate a lot of surface heat, for example, on a 30 degree day the roof tiles generates about 120 degrees of surface temperature and as a result any coating/paint application will take a hammering. The coating/paint application is considered a mechanical application, which simply means that the coating is trying to hold onto the tiles surface, and as it heats up it wants to let go, which is why it’s so important to ensure a proper application is used.
I have had many years of experience. Over that time I have used various products from a variety of coating/paint manufactures. My experience tells me that using a sealer application that suites the tiles surface condition is very important. The other important thing is to ensure that a coating/paint application is applied using the correct film thickness, as this will allow for expansion and contraction of the application. Following are links to the sealers & coating/paint products that we use to ensure our customers get the best result for their roof tiles.