Silicone foam

Foam fixer pump used to draw silicone foam individual components, then mix them at the nozzle and dispense into desired location.

Silicone foam having been dispensed into hole in a wall, above a door.

Silicone foam is a synthetic rubber product used in gasketing, sheets and firestops. It is available in solid, cured form as well as in individual liquid components for field installations.

Uses

• Gaskets
• Sheets
• High temperature tubes for autoclaves
• Firestops
• Surfactants

Vulcanisation

When the constituent components of silicone foam are mixed together, they evolve hydrogen gas, which causes bubbles to form within the rubber, as it changes from liquid to solid. This results in an outward pressure, causing friction between the foam and whatever it is poured into. Temperature and humidity can influence the rate of expansion. If the gas escapes over time, that friction is reduced.

See also

• Firestop
• Gerald W. Brown
• Vulcanisation
• Rubber

External links

Wikimedia Commons has media related to Silicone foam.

• United States Nuclear Regulatory Commission Event Number: 46261: 1" gap appeared in the RTV silicone foam firestop in an Appendix R wall between Fire Area (FA) 29 and FA 30 at PRAIRIE ISLAND, MN, NRC Region 3, Notification Date: 09/20/2010, Notification Time: 17:26 (ET), Event Date: 09/16/2010, Event Time: 13:43 (CDT), Last Update Date: 09/20/2010
• Silicone foam used as high temperature tube for autoclave
• Stockwell Elastomerics silicone foam used in gasketing
• Silicone sponge sheets
• United States Nuclear Regulatory Commission Information Notice 88-04, INADEQUATE QUALIFICATION AND DOCUMENTATION OF FIRE BARRIER PENETRATION SEALS - Bounding
• United States Nuclear Regulatory Commission Information Notice 88-04 Supplement 1, INADEQUATE QUALIFICATION AND DOCUMENTATION OF FIRE BARRIER PENETRATION SEALS - 4 fires in Diablo Canyon starting inside silicone foam
• United States Nuclear Regulatory Commission Information Notice 88-56 POTENTIAL PROBLEMS WITH SILICONE FOAM FIRE BARRIER PENETRATION SEALS
• United States Nuclear Regulatory Commission Information Notice 94-28 POTENTIAL PROBLEMS WITH FIRE-BARRIER PENETRATION SEALS)
• ccnr.org Representative Ed Markey's Statements concerning flammable firestops
• Silicone foam surfactant, the Marangioni effect on cell stabilisation