Linseed oil putty seems to be the embodiment of the very best traditional methods and craftsmanship: it has been around, probably little-changed, for a long time; it is easy to work with; and it smells wonderful, like the naturally derived product it is. 

But as a method for sealing glass into traditional timber-framed windows it is prone to failure — indeed, ask 100 experienced decorators to tell you the curing time for putty, and you will probably receive almost as many different answers. 

In 2014, we bade farewell to our last tub of putty, and switched to Dry Seal, made by Repair Care. It is a considerably more expensive synthetic product, but it is truly superior to putty. Dry Seal remains permanently elastic and, perhaps best of all, can be painted — no arguments — within 30 minutes.

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