Put a coat of boiled linseed oil on window sash and sills before puttying.
Put a coat of boiled linseed oil on window sash and sills before puttying. Putty on dry wood will lose its strength because the oil will be sucked out of the putty and into the wood.
Put a coat of boiled linseed oil on window sash and sills before puttying. Putty on dry wood will lose its strength because the oil will be sucked out of the putty and into the wood.