Puttying is a traditional finishing method.
Formerly, putty based on linseed oil (mastic) was made of chalk powder and linseed oil.
This was often used for filling or stopping up holes or cracks in timberwork and for securing window panes in rebates.
The mastic that we work with is a filling paste based on linseed oil, synthetic resin, and fillers.
It is a mouldable paste that can be applied using a spatula, filling-knife, or putty knife, partly on the edge of the window pane and partly in the metal section.
The surfaces must be clean, dry, and free of dust and fat and they must have been pretreated with a primer.
The mastic must be applied in dry weather and at a temperature of at least 15° C.
The mastic can be painted over, between 3 and 8 weeks after its application (23° C / 55% relative humidity).
By applying this method, you’ll get a truly authentic conservatory as these were installed in bygone days.
Always follow the instructions for use printed on the packaging.
Putty dries through oxidation, this means that it dries through the absorption of oxygen.
Therefore, it should always be painted over after it has cured.
The curing time depends on the type of putty used and is indicated by the manufacturer on the packaging.
Never dilute the putty with linseed oil, turpentine, or anything similar to make it easier to process. It would disturb its composition.
You can make the putty easier to apply by leaving it some time before its processing in a heated room.