Single-component silicone adhesives are generally polysiloxanes, i.e. a silicon-oxygen chain on which organic groups such as methyl groups are attached. The mono-component silicone glue comes in several types of polymerization allowing to form a rubbery elastomer:
RTV silicone adhesive cures by polycondensation at room temperature (by absorbing moisture from the ambient air). Under normal temperature and humidity conditions (25°C and 50% humidity), silicone cures slowly (3mm deep / 24h) but it is possible to accelerate curing by changing these parameters.
HTV silicone adhesive, or high temperature silicone adhesive, cross-links by polyaddition when exposed to high temperature (about 150°C). Unlike RTVs, these adhesives do not require humidity in the ambient air to cure, so they can be used in areas with limited air. In addition, their curing time is fast.
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