Silicone rubber is a semi-organic synthetic material. While silicone rubber looks and
feels like organic rubber, it has a completely different structure to other elastomers. This
structure gives silicone rubber a very flexible feel as well as providing a material that has
very small changes in dynamic characteristics over a wide range of temperatures.
Silicone has a typical service temperature range between –100 °C and +200 °C.
Silicone rubber has many excellent mechanical qualities, but it’s greatest advantage is
that it will not discolour in UV light. So, even after years in the Caribbean sun, these
ventilators will still look like new. The ring nuts and mating deck flanges are made of
hard plastic. The cowl ventilators can revolve and are removable. No tools are required,
the ring nut can be loosened easily by hand. A Monel mosquito screen and a stainless
steel (AISI 316) cover plate to close off the cowl ventilator, can be supplied as an option.