Suggestions for external caulk/ filler

Alfrescodave

I have an octagonal shaped "shed" which has windows on 4 sides. It is showing signs of rot especially where the lower edge of the glass meets the wood panel. Previously I have repaired these gaps with wood filler and overpainted but this doesn't last long.

Can anyone suggest an external type caulk / filler / grout material that is water resistant, can be sanded and painted ?

plumb1_2

Real wood replacement is best.

grumbler

Alfrescodave said:

I have repaired these gaps with wood filler and overpainted but this doesn't last long.

What sort of wood filler?

Two-part epoxy fillers last forever, e.g.

There are other colours - https://www.screwfix.com/c/sealants-adhesives/wood-fillers/cat850104

For small gaps you can add some acetone (very little) to make it thinner. Beware, it sets very vast, so don't mix big amounts.

They also recommend using some wood hardener, but I've never used it

stuart45

grumbler said:

Alfrescodave said:

I have repaired these gaps with wood filler and overpainted but this doesn't last long.

They also recommend using some wood hardener, but I've never used it

I've been using that on our windows for about the last 20 years, and it does work if you get the timber dry first, and get plenty to soak well in.

Alfrescodave

plumb1_2 said:

Real wood replacement is best.

Totally agree; - looking for an "easy" option