"flexible filler"... Best product to use?

[d000hg]

We've had our chimney breast replastered with board then skimmed. Some cracks appeared as it dried, so I cut them out a bit and filled with good filler recommended by a decorator, and repainted. But they all appeared again, I think because we have a log burner perhaps this causes movement in the wall slightly?

Unsure whether to try another go filling now it's had time to ''settle" or something else. Decorators caulk is flexible I think but not designed to be sanded flat?
Can I find a decent filler that will allow some flex... Or would you recommend I try something else?

 

[sonofrob]

ive had this trouble before in an extension we built,,,you could try painting it with a flexible paint,,,like a latex paint such as silk or vinyl,,,latex paints have enough flex not to show fine cracks...

 

[opps]

You are correct that caulk cannot be sanded.

If you enlarge the gaps you can gun in some Tourpet Fibracryl. It is like a caulk but has tiny fibres. Let that shrink back and then use a filler of your choice over it. I would probably use Toupret Redlite. It is easy to sand and the dust doesn't cling to everything.

 

[gc1967]

Toupret Fibacryl is brilliant stuff - check out http://www.toupret.co.uk/business-customers/products/specialist-solutions/fibacryl-FIBACP01G.html