Painters Caulk - 3 Questions

[bolo 2]

1. Is it available in brown or is white the only option?

2. Small cracks are appearing on the horizontal sill(?) on the outside of a window. Can caulk be used to fill them?

3. If so can the cracks be filled in and painted in the winter months?

 

[Notch7]

Painters caulk is not waterproof, so not suitable for use externally.

If its a cill painted white, then I would say run a stanley knife down either side of the crack to make it a bit bigger, then use 2 pack filler and paint over.
2 pack filler is not flexible so only suitable on stable, dry wood.

There are special wood repair epoxy fillers which are fkexible, but they are expensive.

If you are talking about tiny cracks say 1mm wide, you could use MS polymer which is flexible and paintable

 

[sparkwright]

External painters caulk is available, if you know where to look. Painters Mate should be suitable for what you intend.

Not recommended to do any painting or filling at this time of year, especially after all the rain we have had, you will be trapping the moisture in.

 

[bolo 2]

Thanks for the replies guys but bought an exterior decorators caulk at a car boot sale today (50p and in date!) and apart from being for exterior use, it can also be applied at temperatures above 6 degrees. Seller didn’t know if it was available in brown because he only uses white regardless of finishing coat colour. Surprisingly, info claims that it has perfect adhesion on damp surfaces and is rain resistant soon afterwards. Now when is a 6 degree heatwave due?

PS: could have included the name or even a pic of the tube but not sure if that’s allowed on the forum