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Weatherstripping around openings – especially doors and windows – is used in buildings to keep out weather, increase interior comfort, lower utility bills, [2] and reduce noise. Builder weatherstripping can be made from felt; [ 3 ] vinyl, rubber, or poly foam; [ 2 ] [ 3 ] EPDM cellular rubber and vinyl tubing; [ 4 ] and metals such as brass ...
Nitrile rubber is a copolymer of butadiene and acrylonitrile units, but the proportion of acrylonitrile is usually lower than butadiene, so attack occurs. Butyl rubber is more resistant but still has a small number of double bonds in its chains, so attack is possible. Exposed surfaces are attacked first, the density of cracks varying with ozone ...
A variety of fillers can be used in silicone rubber, although most are non-reinforcing and lower the tensile strength. Silicone rubber is available in a range of hardness levels, expressed as Shore A or IRHD between 10 and 100, the higher number being the harder compound. It is also available in virtually any colour, and can be colour matched.
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