Recommendation for Sash Window refurbishment

[buffruffly]

Just wanted to let people know about a fantastic carpenter called Richard Williams who I found on mybuilder.co.uk. He came and refurbished one of our Sash windows last week.  It looks so good I’m having him do more. It’s hard to find people who will repair and paint sash windows and also who are fairly priced. Would highly recommend him. Diligent, tidy and a great craftsman. His number is 07985 161256

Before and after pictures below. 

[skippyupwood]

I’m not sure if this is the right place for my question; mods can move it to another section if needed.

Might seem like a bit of a dumb question but can I seal between a window and the wooden frame with dry seal by Dryflex? My porch has a very basic wooden frame that holds single panes of glass. I’ve noticed that water is seeping down the back of the frame and causing rot, so I need to seal around the glass to stop this from happening.

I thought that perhaps something like this  https://surreysashwindowspecialist.co.uk/blog/putty-alternative/ might work, but can't really tell if this is is only to seal around the frame or can be used to seal around the window itself.

Edited October 21 by skippyupwood