Housing section for an electric circuit to be protected from harmful substances, e.g. a motor vehicle locking system, and process for producing a housing with the housing section

A housing for an electrical circuit to be protected from harmful substances, comprising:

• a housing section being formed of hard thermoplastic synthetic material and having a hole formed therein;
• and
• at least one pressure member having edges, being formed of soft thermoplastic synthetic material and being accessible from outside the housing for operating at least one electrical switch to be disposed inside the housing, said edges of said pressure member forming an all-round water-tight and adhesive-free cover for said hole in said housing section, with said edges being directly injection molded onto the synthetic material of said housing section and the synthetic material of said pressure member and the synthetic material of said housing section being fused together, such that said housing section and said at least one pressure member together form a one-piece portion of the housing.