A fire-stopping material in a panel for an interior building wall is provided. The fire-stopping material includes a resilient, porous material at least partially impregnated with an intumescent agent. A method of providing a service penetration through an internal building wall having fire-stopping material therein.

Methods and compositions for preparing an elastomeric gel block comprising a lubricious surface are provided. A closure or interconnect system sealed with the elastomeric gel block comprising a lubricious surface can exhibit reduced adhesiveness, reduced tack time, and requires substantially reduced force to re-open the closure or interconnect system.

A pressurised dispensing container (10) comprising a container (11) for product to be dispensed, and a valve fixed to the container, wherein the container contains a propellant comprising 1,1-difluoroethane or a derivative thereof and optionally ethanol. The valve comprises a valve stem (15), a valve body (16, 18) and one or more seals (20, 21), the valve stem being slidable within the valve body, the one or more seals co-operating with the valve stem for regulating discharge of a fluid. The valve further comprises a sealing gasket (14) for sealing the valve to the dispensing container. The one or more seals (20, 21) is/are formed from (i) an elastomeric composition, preferably an elastomeric composition comprising an ethylene-propylene-diene terpolymer. The sealing gasket (14) is formed from (ii) an elastomeric composition comprising an isobutylene polymer or co-polymer thereof.

A pressurised dispensing container (10) comprising a container (11) for product to be dispensed, and a valve fixed to the container, wherein the container contains a propellant comprising 1,1-difluoroethane or a derivative thereof and optionally ethanol.

The valve comprises a valve stem (15), a valve body (16, 18) and one or more seals (20, 21), the valve stem being slidable within the valve body, the one or more seals co-operating with the valve stem for regulating discharge of a fluid. The valve further comprises a sealing gasket (14) for sealing the valve to the dispensing container.

The one or more seals (20, 21) is/are formed from (i) an elastomeric composition, preferably an elastomeric composition comprising an ethylene-propylene-diene terpolymer. The sealing gasket (14) is formed from (ii) an elastomeric composition comprising an isobutylene polymer or co-polymer thereof.