On Sunday, 14 April 2019 13:04:00 UTC+1, Dave Plowman (News) wrote:
In article ,
Jim K.. wrote:

Flexible filler won't solve it, the percentage of movement in a
hairline crack is too large. Filling it at painting time is trivial.

All I can say is it worked here. Whereas pollyfilla etc didn't.


You dug it out first though didn't you?

I obviously dug out the old pollyfilla.

I doubt you could squeeze caulk into a hairline crack anyway.

I've not met any filler that doesn't go into a hairline crack, other than coarse sand based stuff.


NT