The bell end of a bell and spigot joint is disclosed herein and includes an end section of a plastic pipe, an axially extending circumferential insert located concentrically within this end section, and a circumferential sealing gasket located within a groove in the inner surface of the insert. A method of making this bell end is also disclosed.

An improved book article has a book body attached to a case at the hinge by a bonding agent having a short period of adhesiveness following exposure to indirectly applied energy. The bonding agent is located at the hinge area of the book.

A coating method and coating composition are provided for the sacrificial protection of metal substrates, e.g. magnesium and magnesium alloys, wherein the coating bonded to the metal substrate comprises a non-metallic adhesive material, such as an epoxy resin, having dispersed therethrough a powdered alloy composition which is electropositive to the metal substrate, said coating composition being electrically conductive relative to said metal substrate.

A weldable sealant composition is made by adding ferrous metal particles to a sealant having a viscosity of at least 6 million centipoises. The sealant composition is placed between two metal plates and permits resistance welding, i.e. spot welding, to take place.

An adhesive composition which is curable by electromagnetic induction heating when it is applied to various substrates, said adhesive comprising a mixture of (I) An epoxy resin component and (II) A hardener component and (III) From 2 to 60% by weight of (I) and (II) of an electromagnetic energy absorbing material is described.