ᐅ Repairing Cracks in Exterior Walls – Which Material Should You Use?

Hello everyone,

hopefully a quick question.

I have small cracks (hairline cracks) on the weather-exposed side of the facade and I’m currently repainting anyway. For painting, I’m using Zero Fassade 95. What is the best product to fill these small cracks? There seem to be many options—carbon filler, painting fleece, quartz primer—or are they essentially the same? I have used Zero Renotec quartz primer so far; do you have any recommendations?

Good luck
Andi

I recently had a tube of structural acrylic in my hand that stated it can be used to seal small cracks in the facade and then be painted over. But if the entire facade has hairline cracks, that can’t be a proper solution.

Please define “hairline crack” using a crack width chart or a photo (or both).