Bluesil (formerly Rhodorsil) RTV 147 A & B and RTV 148 A & 147 B are two component, polyaddition reaction, room temperature curing silicone elastomers. Curing can be accelerated by heating. It is possible to mix Bluesil RTV 147 A and 148 A to give an elastomer of intermediary hardness. After mixing the two components (parts A and B), Bluesil RTV 147 and 148 form a flowing paste which transforms into an elastic material once cured. The reaction does not give off any heat.