Device for sealing pneumatic tires

Device for sealing pneumatic tires by means of sealing liquid, comprising a sealing liquid container having an air inlet opening for connection to a compressor and an outlet opening for the discharge of an air/sealing liquid mixture into a pneumatic tire to be sealed, the sealing liquid container having at least two chambers in which components of the sealing liquid that are reactive to one another are stored separately, the chambers being separated from one another by a closed connecting element which can be opened via a pressure and/or an air flow from the air inlet opening to the outlet opening, characterized in that the valve is designed such that in the event of sufficient predetermined pressure from the compressor via the air inlet opening, the valve opens, and the sealing liquid container is designed such that the air flows from the first chamber into the second chamber and from the second chamber into the tire via the outlet opening, the sealing liquid container being designed such that the components of the sealing liquid mixture, in particular in the second chamber, are mixed.