However, silicone lubricant is safe to use with latex condoms. Since it's waterproof, it won't wash away during foreplay or sex in the water.
More About Silicone Lubricant
Silicone lubricant should not be used with sex toys that are also made from silicone. This can result in a reaction that can degrade the surface of the toy over time. Not only can this ruin a toy eventually, but it will also create a perfect environment for bacteria to grow in the meantime.