Kit comprises: a component (a), which contains at least (a1) a mono-functional, hydrophobic methacrylic acid ester, (a2) a filler, and (a3) a radical initiator soluble in the methacrylic acid ester (a1) and having at least one peroxide group, a component (b), which contains at least (b1) a mono-functional, hydrophobic methacrylic acid ester, (b2) a filler, and (b3) a radical initiator soluble in the methacrylic acid ester (b1) and having no peroxide group, and a component (c), which contains e.g. at least (c1) a mono-functional, hydrophobic methacrylic acid ester. Kit comprises: a component (a), which contains at least (a1) a mono-functional, hydrophobic methacrylic acid ester, (a2) a filler, and (a3) a radical initiator soluble in the methacrylic acid ester (a1) and having at least one peroxide group, where the component (a) contains 15-85 wt.% of methacrylic acid ester (a1) and less than 85 wt.% of filler (a2), a component (b), which contains at least (b1) a mono-functional, hydrophobic methacrylic acid ester, (b2) a filler, and (b3) a radical initiator soluble in the methacrylic acid ester (b1) and having no peroxide group, where the component (b) contains 15-85 wt.% of methacrylic acid ester (b1) and less than 85 wt.% of the filler (b2), and a component (c), which contains at least (c1) a mono-functional, hydrophobic methacrylic acid ester, (c2) a filler, and (c3) an accelerator soluble in the methacrylic acid ester (c1) and capable of forming radicals from the radical initiators (a3) and (b3), where the component (c) contains 15-85 wt.% of methacrylic acid ester (c1) and less than 85 wt.% of filler (c2), where at least one of the components (a), (b) or (c) contains at least one halide salt and at least one crosslinking agent, and where, based on a total weight of the components contained in the components (a), (b) and (c), (i) a total weight percentage of the methacrylic acid esters (a1), (b1) and (c1) lies at 15-50 wt.%, (ii) a total weight percentage of fille
