Waterproof wire connectors are typically filled with moisture resistant materials such as silicone, grease or petroleum to prevent corrosion of the exposed wire ends. These wire connectors protect your work that is exposed to the moisture or the elements. The waterproof electrical connectors are a must for landscape lighting and some irrigation equipment. You will have peace of mind knowing that these products are made with the best grade of protective waterproof materials. Check the voltage rating of these waterproof wire connectors before you buy, and also, be sure to get the right quantity to cover your needs.