SEELOC washers consist of silicone rubber bonded to formed stainless steel washers, and are designed for a variety of electrical and mechanical applications. SEELOC washers are used with conventional screws, bolts or studs to complete the sealing and locking action. UL Recognized (UL Type 4X/6 enclosures) and IP66/68 water ingress rated, SEELOC is an ideal sealing solution in a wide variety of mechanical, electrical and electronics applications that require high-performance, air/water-tight sealing. Upon compression, the bonded, dish shaped silicone rubber sealing disc makes full 360 degrees horizontal surface contact from the hub to the mounting hole (see A). The silicon rubber also makes full vertical contact with the screw/bolt shank/threads – thus completing the high-pressure seal. This would be a difficult feat for an ordinary O-Ring, or any sealing washer that does not fully make fastener contact. The SEELOC silicone contact surface landscape features a continuous ridge (see B), creating a contoured sealing barrier, as well as a periphery locking joint, when used for mounting on a protruding round extended surface (see C). Extra large size holes or odd shaped adjustment-slots, in addition to conventional mounting holes, also benefit from these precision, reusable sealing washers. SEELOC washer technology is perfect for any securing application where spray or wash-down is present, and where future maintenance may be of concern due to contaminant exposure from salt spray, ozone, UV, lubricants, cleaning solvents, etc.