Silicone

[Jim Scott]

Two questions:

Is there a paint which you can use over silicone filler that does not peel off?

Can I get a thinner less rapid drying silicone that I can paint on to a surface to waterproof it?

[R.P.McMurphy]

what kind of surface?

Steve

[Jim Scott]

OLD wood. I have an attic window which I cannot afford to replace. The wood is original and allows water through on the front where I can reach. I applied silicone and smoothed it in with my finger and it appears to have worked. I would like to be prepared in case I have missed a bit.

[someone here]

FlexAcryl or similar. A flexible waterproof 'paint'.

Used by councils to repair flat roofing, also used on vertical surfaces. Think several thin coats rather than one thick one.

HTH

Dave

[Jim Scott]

Thank you

[R.P.McMurphy]

I would have been tempted not to use silicon, but a paintable mastic or similar sealant instead and then give it a generous coat of gloss paint. I don't think anything will paint over silicon unless it is a thin bead which you can put a thick bead of mastic over the top which bridges the silicon, then let it skin over and then paint. is thewindow frame very visible?

Steve

[Ian Stirling]

I have had interesting results using acetoxy cure silicone (the one that smells like vinegar when it cures) thinned with white spirit, to a yogurt like consistency, for painting on stuff. However, while this does provide a film, that will stick to silicone, I don't know of its long term stability.

[Jim Scott]

Me too really, but I was desperate to find the leak and stop it and that's what I had to hand at the time. It might peel of if necessary.

[somebody]

In message , Jim Scott writes

Dig out any rotten wood on the window frame, replace with a decent wood filler (if the filler is not two pack/two part then it's probably not decent).

Having finished packing, sanding back etc, seal the frame edges with frame sealant (the name gives it's purpose away) and then protect the wood however you see fit. Gloss, varnish etc.

Silicon works well in many situations, but rotten or rotting wood isn't one of them.

Hth Someone