Sponge Cord (Expanded Silicone)
Expanded silicone cord is supplied by the metre in a range of diameters between 3mm and 25mm. As a soft compressible material, it can be used for sealing applications that aim to prevent water ingress. Depending on the projects requirements, it can be used in linear lengths or manufactured into o rings using a good quality silicone sealant. It is supplied in white with a smooth outer skin.
As this sponge cord is manufactured from a closed-cell material, it does not absorb water allowing for the creation of watertight seals on hatches, cabinets and other enclosures. Expanded silicone is slightly firmer than expanded neoprene but should still only be compressed by approximately 30% to avoid compression set caused by over compression.
As silicone has a wide operating temperature range between -60°C to +200°C, expanded silicone cord is commonly used in low and high temperature applications within the medical and pharmaceutical industry sectors.