Fluval Silicone Lubricant helps to prolong the overall life of your filter through regular application on rubber O-rings, gaskets, seal rings, plastic primer stems and latches.Fluval Silicone Lubricant+ continued product use increases the longevity of all rubber parts in your filter, which break down over time+ ensures smooth operation of latches and priming handles+ facilitates installation and removal of canister filter motor heads+ prevents kinking and distortion of O-rings, which also reduces risk of leaks+ superior to commonly used petroleum based products, which leave an unsightly film on water surface and prematurely break down rubber parts+ 100% safe for aquatic environments