Does anyone have much experience of working with Palace Heat Resist Adhesive? I'm just about to tile a fireplace with it for a log burner but I've noticed that on the tub it says it will 'take up to 14 days to develop full adhesion and should not be exposed to radiant heat during this time'. That seems a crazy long time! Are there better products out there? Will I be OK lighting the fire sooner? I've searched the Internet for any clarification but I can only find generalised info stating 24-48 hours.