The production material of waterproof junction box at present basically divides into two kinds, one kind is plastic, another kind is stainless steel material. 

The main types of plastic junction boxes are engineering plastics, PC and fiberglass.The reason why these materials can be used is mainly because their waterproof effect is good, long service life, and the source of the material is more extensive price is relatively cheap, so even in the future also have a good application prospect. 

Junction box of qualitative as stainless steel is used in specific circumstance commonly, see rarely in the life.And the element that contains according to stainless steel different application also can differ somewhat. 

The above two types are commonly used to make waterproof junction boxes.