File:Silicone foam sakno1.jpg

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Description 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 .
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Author Achim Hering

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Public domain This work has been released into the public domain by its author, I, Achim Hering. This applies worldwide.
In some countries this may not be legally possible; if so:
I, Achim Hering grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
This image is very small, unfixably too light/dark, or may not adequately illustrate the subject of the image. If a higher-quality version of this particular image is available, please replace this one; otherwise, a supplemental image illustrating this subject and available under a free license should be found or provided and uploaded as a separate file.

Please see Category:Image cleanup templates for templates used to mark images that only need a clean-up. For more help, see Commons:Media for cleanup#Low quality images.

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current02:47, 11 July 2007Thumbnail for version as of 02:47, 11 July 20074,591 × 3,157 (1.17 MB)Achim Hering (talk | contribs){{Information |Description=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 d

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