A kit for producing bone cement includes at least one paste A and one paste B. Paste A contains at least one monomer (a1) for radical polymerization； at least one polymer (a2) insoluble in monomer (a1)； at least one polymer (a3) soluble in monomer (a1)； and at least one radical polymerization initiator (a4). The weight ratio of the at least one polymer (a2) to the at least one polymer (a3) is at least 2 to 1. Paste B contains at least one monomer (b1) for radical polymerization； at least one polymer (b2) and at least one accelerator (b3) soluble in monomer (b1)； and optionally a polymer (b4) insoluble in monomer (b1). The maximum quantity of polymer (b4) is 5% by weight, relative to the total weight of paste B. The weight ratio of polymer (b4) to the at least one polymer (b2) is no more than 0.2.
