Sponge Rubber Seals
Sponge rubber seals are manufactured from sponge rubber materials, such as expanded EPDM or expanded neoprene. These compressible materials are manufactured into extruded profiles in a large range of shapes and sizes designed to offer a solution to most sealing problems. They can be used for almost any application that requires a seal to stop the ingress of water, air or dirt. As expanded EPDM and expanded neoprene are a type of closed-cell sponge rubber they will not absorb water or moisture.
Extruded sponge rubber seals are manufactured with a matt skin that gives the section a clean aesthetic appearance. They are often extruded with a hollow centre or external fin that aids compression when installed in environments that have low closing forces. All of these sections serve different purposes and offer different levels of compression and recovery.
As sponge seals require compression to create watertight seals, they can be damaged with excessive and prolonged force. Compression set can be avoided by installing the correct seal for the size of gap you are looking to fill. We recommend fitting a sponge rubber section that is approximately 30% bigger than the size of the gap. For example, to seal a 10mm gap you should look to use a section that is around 15mm high.