Abstract: This invention relates to a process for sealing any foamed rubber product or foamed plastic product having a foam cell structure, excluding foamed polystyrene, to provide a continuous, flexible, impervious surface including applying to the surface a primer which penetrates partially into the foam cell and then applying a polymeric composition to the primer-treated surface. The invention also relates to formulations used in the process and products produced by the process.

Abstract: A formulation for use as a primer, a first polymeric composition or a second polymeric composition in a process of sealing a foamed rubber product or foamed plastic product, excluding foamed polystyrene products, to provide a continuous flexible, impervious surface. The formulation includes an adhesive polymeric resin. The process includes applying a primer of foam-penetrating viscosity to a surface of a foamed product, such that the primer penetrates partially into the foam cell structure at least partially coating the surface. A liquid first polymeric composition is then applied under pressure onto the primer-treated surface which effects at least partial penetration of the first polymeric composition into the product.