Abstract: Stamped product intended particularly for permanently obturating holes, especially in metal sheets or in plastic parts, having an at least partly single-sidedly self-adhesively treated base layer comprising a heat-resistant backing, the base layer being shaped so as to extend at least sectionally beyond the outer margin of the hole that is to be obturated, and the base layer being provided on the adhesively treated side with a block of a heat-activable foamable material whose area is greater than the area of the hole to be obturated and preferably less than the area of the base layer, the stamped product being applied over the hole to be obturated, in such a way that the hole is completely covered by the stamped product.