Sealing plug for closing holes in walls and the like

A sealing plug for closing a hole in a wall, the hole in the wall having an inner face, and the wall having an outer contact surface surrounding the hole in the wall;

• the sealing plug being of the type comprising:
• an elastic body and
• a stem coaxially assembled with one another, the stem having a free end emerging out of the elastic body;
• said elastic body comprising
• a main body which is configured for being expanded radially when pulling on the free end of the stem emerging out of the elastic body, thus exerting a radial closing pressure (p) on the inner face of the hole to be plugged, and
• a head attached to the main body, said head being configured for being compressed and for hermetic sealing and exerting an axial closing pressure (P) on the outer contact surface of the wall surrounding the hole to be plugged when pulling on the free end of the stem, the head comprising a compressive strength less than that of the main body such that at least part of said head changes its geometry to adapt to the shape of the outer contact surface of the wall surrounding the hole to be plugged,
• the sealing plug also comprising
• a first thrust washer arranged close to the opposite end of the area of attachment between said head and the main body and
• a second thrust washer arranged on the outer face of the head such that it enables the compression of the plug between said first and second thrust washers.