Adhesion promoters, lubricants, fillers and the like are preferably added to the composition to improve the properties thereof.  

Solvent-free hot melt compositions for use as joint sealant , adhesives, caulking compounds or the like are produced by intimately blending elastomeric polymers with tackifying resins and plasticizers to obtain products having a hardness at room temperature of at least about 5 on the Shore A Durometer scale while being sufficiently soft at temperatures of about 50°F or higher to permit them to be easily extruded or otherwise applied. 

The products are characterized by their stability over a wide range of temperatures, their resistance to oxidation and weathering, and their low moisture vapor transmission properties.