Abstract: A seal for pipe penetration or the like is formed, in at least one embodiment, of two halves, the seal received in a sleeve or opening of a wall or the like. The seal forms a central opening for a pipe or tube when the seal halves are brought together. Each seal half is formed of two base parts. Between the base parts a layer of intumescent material is placed. On the inside of the base parts peelable layers are arranged. The layers are peeled off to adapt the inner diameter of the seal to the pipe or tube received. In case of fire, the intumescent material will expand which expansion will collapse and close off the pipe or tube received in the seal.