Elastomeric coatings stretch and recover as a wall moves fractionally with temperature and settlement, which lets them bridge fine, stable cracks that would simply reopen through a standard masonry paint within a season.
A good elastomeric system will span fine, static hairline cracking reliably. It is not designed to bridge active structural movement, and applying it over a crack that is still opening simply relocates the failure to the paint film instead of the render.
We monitor questionable cracks where there is any doubt, and where movement looks ongoing we recommend a structural assessment before any coating is chosen. Painting over unresolved movement is a false economy that shows up again within a year.
Elastomeric systems are typically applied at a higher film thickness than standard masonry paint, often in two full coats over a suitable primer, which is part of why they cost more and why thin, rushed application defeats the purpose.
It will bridge fine, stable cracking effectively, but it cannot resolve ongoing structural movement — that needs investigation separately before any coating is applied.
Usually yes, a compatible primer is specified to help adhesion and even out suction, particularly on patched or uneven render.
Yes, though the higher build often benefits from a stipple or textured roller to achieve the specified film thickness evenly.
Send photos of the cracking and we will tell you whether an elastomeric coating is the right response.
Elastomeric coatings bridge fine, stable cracking well, but they are not a fix for movement that is still active.
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