Kit comprises: a paste A comprising (a1) a polymerizable monomer having a pH in water of 5-9, (a2) a filling agent insoluble in (a1), and (a3) a barbituric acid derivative comprising e.g. 1,5-disubstituted barbiturates or 1,3,5-trisubstituted barbiturates； and a paste B comprising (b1) a polymerizable monomer having a pH in water of 5-9, (b2) a filling agent insoluble in (b1), (b3) a peroxide soluble in (b1), and (b4) a heavy metal compound insoluble in (b1), comprising heavy metal salts and heavy metal complexes, where at least one of the pastes A and B contains a halide salt. Kit comprises: a paste A comprising (a1) a polymerizable monomer having a pH in water of 5-9, (a2) a filling agent insoluble in (a1), and (a3) a barbituric acid derivative comprising 1,5-disubstituted barbiturates, 1,3,5-trisubstituted barbiturates or 1,3,5-tetrasubstituted barbiturates； and a paste B comprising (b1) a polymerizable monomer having a pH in water of 5-9, (b2) a filling agent insoluble in (b1), (b3) a peroxide soluble in (b1), and (b4) a heavy metal compound insoluble in (b1), comprising heavy metal salts and heavy metal complexes, where at least one of the pastes A and B contains a halide salt.
