Medium Density Fibreboard (MDF)
Factory primed timber has its advantages for new work as protection against the elements and site conditions.
For interior work, the majority of the primed timber is MDF for trim work i.e. Door lining, architraves,, door stops, skirting boards and internal doors.
The type of primer used is generally an acrylic resin based paint.
Although ready primed, the priming coat should be examined and if necessary spot priming should be carried out.