Waterproof screws are screws that are designed to resist the infiltration of water and moisture. They are typically made of corrosion-resistant materials such as stainless steel, aluminum, or  coated steel and Waterproof Screws Manufacturers have a special coating or treatment that makes them resistant to water and corrosion.

Waterproof screws come in different sizes, designs, and materials, depending on the application. They can be used in various construction and industrial applications, including outdoor decking, roofing, and marine applications, among others.

One common type of waterproof screw is the "self-drilling" screw, which has a sharp point and a fluted shank that allows it to drill its own hole as it is driven into the material. These screws are often used in roofing applications, where they can be driven directly into the decking without the need for pre-drilling. Other common types of waterproof screws include those with a neoprene or EPDM washer which are ideal for use in decking and other outdoor applications.

Another type of waterproof screw is the "torx" drive, which uses a six-pointed star-shaped pattern on the head of the screw to increase its resistance to water, corrosion and tamper-resistance.

It is important to note that no screw can be completely waterproof, but these special screws are designed to resist water and moisture infiltration to a greater degree than regular screws and can be considered as water resistant.