Gulley closure

DETAILED DESCRIPTION OF THE INVENTION The gully closure according to FIG.
1 consists of a flexible, approximately 20 mm thick mat, e.
g.
made of silicone rubber or another flexible rubber material, which is coated on the underside with the above-described highly viscous single-component silicone rubber composition.
This composition is free-flowing in a highly viscous manner, i.
e.
it is deformable under pressure.
The thickness of the moulding composition is about 50 mm.
The moulding composition 2 is surrounded by a packing shell 3, e.
g.
made of Styropor, which is laminated on its outer side with an air-tight polyethylene film 4.
The packing shell 3 (e.
g.
consisting of a cardboard box) serves as packing for the moulding composition 2 and is intended to protect it from undesired deformation, e.
g.
during storage or transport.
The polyethylene film 4 protects the moulding composition 2 from moisture and other atmospheric influences.
A release cord 5, having a handle 6, extends transversely through the packing shell 3 and the film 4.
If required, i.
e.
in the event of an accident in which a hazardous liquid escapes, the packing shell 3 plus the film 4 is torn open by pulling on the release cord 5 and the moulding composition 2 is exposed.
The mat with the moulding composition is then placed in such a way onto the gully to be closed that the moulding composition 2 covers the entire gully surface.
The mat is then stamped down uniformly.
On account of the high pressure exerted in the process, the moulding composition flows into all openings and recesses of the gully grating and adheres well throughout on account of its sticky consistency, so that a sound seal is ensured (see FIGS.
3 and 4).
Another embodiment of the invention is shown in FIG.
2.
The base 7 of an open robust carton 8 is covered with a 2 cm thick layer or mat 1 of a silicone rubber an additionally filled with a high proportion of silica sand and vulcanized at room temperature or at a higher temperature.
Applied to this layer or mat 1 to a thickness of about 4 cm is a liquid silicone formulation which cures at room temperature--or even quicker at an increased temperature--to form a plastic gel layer 9