1.1 This specification covers backer material for cold- and hot-applied joint sealant for use in portland-cement concrete or asphalt-pavement joints. 1.2 This specification establishes basic requirements for sealant-back This specification covers backer material, either in rod or strip form, for use with cold- and hot-applied joint sealant in portland-cement concrete or asphalt-pavement joints. Sealant backer material is available in three types: Type I, Type II, and T