About J. H. Harman Master Thatcher’s
New To Thatchers Magma Firestop is a proven fire retardant
New to Thatcher portfolio! Magma Firestop is a proven fire retardant spray treatment for thatch. It is environmentally friendly and has no detrimental effect on plants nor animals.
Magma Firestop offers an ‘A’ rating for Spread of Flame and a ‘B’ rating for penetration under BS 476 Part 3′. It is also tested and used throughout the world.
Contact us for more information or if you have any specific question about our New service