J&J Electronics Guardian 100% silicone pool and spa lens gaskets provide superior resist to breakdown from chlorine, heat and sunlight for a longer lasting seal than rubber based gaskets. Guardian is the number one choice for customers looking to install the best quality gasket possible at a price level comparable to other manufacturers rubber based gaskets. Guardian gaskets should always be used when installing long lasting LED’s such as J&J’s Color Splash® and Pure White® 2 replacement lamps, and they work just as well on standard incandescent replacements.