My decorator has used the Thermoguard 30 minute Timber protection system which delivers an off white finish? Can we use A Dulux Silk finish top coat to delver a whiter white to match other woodwork without diminshing fire retardance?
Unfortunately no, this system can only be over painted with the manufacturers approved topcoat below assuming the system was applied to timber but not doors.
This can be mixed to many RAL, NCS or BS colours.