Good quality flexible interior sealant.

[spoony77]

Hi people
I've used caulk around the interior of my bedroom window a couple of times now but it always develops a massive crack and I can feel lots of cold air rushing in. I think I need a flexible sealant as I assume its not sealing properly due to excessive movement and temperature fluctuations.
Can anyone recommend a good one for my usage case as there's so many on the market its quite overwhelming....
Any advice appreciated.

 

[RandomGrinch]

Hi,

I haven't used it myself, but I've heard good things (usually from this forum! ), about Toupret Flexible Filler:
https://www.toolstation.com/toupret-fibacryl-flexible-filler/p40082

If the draft is excessive, might it be worth digging out the crack enough to get some expanding foam in?

 

[phatboy]

CT1 is excellent, resolved the cracking I had around various windows, and is paintable.

You would also want a can of the solvent, as it's very sticky!

 

[Wayners]

Use a polymer like CT1 or OB1

 

[johnny2007]

Soudal fixall.
Super flexible and paintable, comes in white brown or clear.

https://www.screwfix.com/p/soudal-f...eF_H2x6iNi-QvViFpGBoCxigQAvD_BwE&gclsrc=aw.ds