A sealant strip is provided having a soft, resilient synthetic foamed resin core, preferably having a pressure sensitive adhesive coating on at least one of two of the opposed sides of the core and thin preferably silicone rubber sealing layers cured in situ on the two remaining surfaces of the core....http://www.google.com.au/patents/US4356676?utm_source=gb-gplus-sharePatent US4356676 - Sealant strip
