Probably not. Silicone camera covers generally do not provide meaningful water or dust protection.

The main places where water and dust enter a camera are the lens mount, battery door, connector ports, and the gaps around buttons and dials. A silicone skin usually only covers parts of the exterior and does not seal those critical entry points. Because of that, it won’t make a non-weather-sealed camera safe to use around sea spray, crashing waves, or similarly wet/dusty conditions.

At most, a silicone case may offer a small amount of protection from minor bumps, scratches, or improved grip. But for environmental protection, it is largely ineffective.

If you need to shoot near surf or blowing dust, you should assume a silicone case is not enough. Use proper rain protection or a camera/lens combination designed with weather sealing instead.