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° 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.