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| Keywords: Silicone foam sakno1.jpg Faulty Sakno silicone foam firestop installation in a Calgary wastewater treatment plant in the 1980's This is a hole in a fire-resistance rated concrete wall above a fire door frame The outside temperature was ca -40°C -40 F The inside was heated A steady temperature is needed for the foam to snap solidify and expand properly as it evolves hydrogen gas Every now and then someone opened the outside door the temperature would plummet and the foam's consistency was affected as can be seen by the tears and uneven bubble distribution and incomplete phase change To achieve its rating as per its certification listing the foam also requires ceramic fibre boards furnace insulation to permanently cover both sides of the foam a common deficiency exposed by whistleblower Gerald W Brown This is image 1 of 2 The other one is right here http //commons wikimedia org/wiki/Image Silicone_foam_sakno2 jpg Own 2007-07-10 Achim Hering low quality Firestops being installed Certified firestop materials - incorrect installation Building code violations Silicone foam Fire doors | ||||
