A sealant for a concrete element, having a planar carrier and an active substance applied onto the carrier, wherein the active substance is designed to be chemically reactive with water. The carrier is flexible.

A composition for sealing joints, penetrations and other leaks in particular in the construction field, including at least one ethylenically unsaturated, radically polymerizable water-soluble compound, at least one radical initiator, water and at least one corrosion inhibitor including at least one phosphate. The corresponding composition has a corrosion-inhibiting effect with respect to metal.

This disclosure relates to degradable rubber compositions, such as those, for example, comprising at least one natural rubber; at least one polyurethane; at least one curing agent; and at least one complex using zinc chloride and a disulfide, wherein the degradable rubber composition is degradable in an aqueous composition.

A seal groove is cut in the distal end face of a wrap of a fixed scroll, with a tip seal being fitted in the seal groove. Swelling members are interposed between both side faces of the tip seal and corresponding opposite side faces of the wrap. Condensed liquid of working medium w and water condensed from steam contained in the working medium w that are present between the tip seal and an end plate provide a sealing effect. When the swelling members swell upon absorbing the condensed liquids, they exert a strong pressing force on the tip seal and the wrap, thereby firmly retaining the tip seal in position. This prevents the tip seal from being pressed against the end plate, so that wear of the tip seal is reduced.