However, as they contain sulphur, they can leach out hydrogen sulphide over time, which can cause corrosion, if they are used in LED light fittings.
For this reason, The SFS Manufacturing Group is now offering silicone rubber components that are guaranteed 100% sulphur free and made from compounds specifically designed for use in indoor and outdoor lighting enclosures.
Seal profiles, rings, flat gaskets and cord can be manufactured to exact requirements in solid silicone rubber, as well as silicone foam variants, to suit the luminaire design. "Our customers have often reached seal ratings as high as IP67 using our silicone rubber products," said SFS operations manager Tony Parker.
The hydrogen sulphide given off by vulcanised rubbers can cause corrosion in components such as silver-plated LED frames, which can damage the electrical contacts with the wire bond or die bond. It can also cause dimming and discolouration of the LED itself.
