Envirograf - HW Superb Top Coat
A primer is not required if the timber is new, untreated or tanalised. You will require a primer if you are applying to Oak.
TWO COATS OF TOP COAT ARE REQUIRED TO SATISFY BUILDING CONTROL.
 
Description
A range of clear or white intumescent coatings, ideal for upgrading existing timber surfaces to either 30 or 60 minutes integrity. Can be easily applied internally or externally by brush, roller or spray.
Fire Test Performance
Tested on a wide range of wooden doors, achieving 60 minutes integrity and either 30 or 60-minute fire protection and insulation according to BS476 Part22.
Up to 60 minutes fire protection achieved on open joists and floorboards according to BS476 Part 20.
90-minute fire rating achieved on timber mouldings and carcasses according to BS476 Part 20.
Tested on a range of timber types, including plywood and MDF, complying with BS476 Parts 6 & 7, Classes 0 & 1 (Spread of Flame).
Tested to European Standard EN1364-1, achieving 66 minutes integrity.
Complies with Classification B/S1/d0 of European Standard EN13823, single burn test (SBI) and EN11925-2 (ignitability). 
Top Coat covers 8m2 per litre