Curable compositions comprising resin component comprising at least one organopolysiloxane resin consisting of units of the formula R a b (R 1 O) c SiO (4-a-b-c)/2, wherein R may be identical or different and denotes a monovalent, SiC-bonded hydrocarbon radical optionally substituted by halogen atom, or Si-bonded halogen atom, R 1 may be identical or different and denotes a monovalent, optionally substituted hydrocarbon radical, a is 0, 1, 2 or 3, b is 0, 1, 2 or 3 and c is 0, 1, 2 or 3, with the proviso that in formula the sum a+b+c<3, in the resin component b≥1 in at least 2% of all the units of formula, in the resin component c≥1 in not more than 10% of all the units of formula, in the resin component a=2 in at most 50% of the units of formula, and the resin component has a mean molecular weight Mw (weight average) of from 500 g/mol to 11000 g/mol and a mean molecular weight Mn (number average) of from 500 g/mol to 5000 g/mol, and the polydispersity (Mw/Mn) of the resin component is from 1 to 5, wherein molecular weights Mw and Mn are determined by the method in the description, organosilicon component consisting of at least one organosilicon compound consisting of units of the formula R 2 d e (R 3 O) f SiO (4-d-e-f)/, wherein R 2 may be identical or different and denotes a monovalent, SiC-bonded hydrocarbon radical optionally substituted by halogen atom, or Si-bonded halogen atom, R 3 may be identical or different and denotes a monovalent, optionally substituted hydrocarbon radical, d is 0, 1 or 2, e is 0, 1, 2 or 3 and f is 0, 1, 2 or 3, with the proviso that in formula the sum d+e+f≤4, in the organosilicon component f≥1 in at least 10% of all the units of formula, in the organosilicon component e≥1 in not more than 2% of all the units of formula, and in the organosilicon component, in at most 50% of the units of formula with d+e+f≤3, d=2, and at least one filler. resin component comprising at least one organopolysiloxane resin consisting of units of the formula R a b (R 1 O) c SiO (4-a-b-c)/2, wherein R may be identical or different and denotes a monovalent, SiC-bonded hydrocarbon radical optionally substituted by halogen atom, or Si-bonded halogen atom, R 1 may be identical or different and denotes a monovalent, optionally substituted hydrocarbon radical, a is 0, 1, 2 or 3, b is 0, 1, 2 or 3 and c is 0, 1, 2 or 3, with the proviso that in formula the sum a+b+c<3, in the resin component b≥1 in at least 2% of all the units of formula, in the resin component c≥1 in not more than 10% of all the units of formula, in the resin component a=2 in at most 50% of the units of formula, and the resin component has a mean molecular weight Mw (weight average) of from 500 g/mol to 11000 g/mol and a mean molecular weight Mn (number average) of from 500 g/mol to 5000 g/mol, and the polydispersity (Mw/Mn) of the resin component is from 1 to 5, wherein molecular weights Mw and Mn are determined by the method in the description, a is 0, 1, 2 or 3, b is 0, 1, 2 or 3 and c is 0, 1, 2 or 3, organosilicon component consisting of at least one organosilicon compound consisting of units of the formula R 2 d e (R 3 O) f SiO (4-d-e-f)/, wherein R 2 may be identical or different and denotes a monovalent, SiC-bonded hydrocarbon radical optionally substituted by halogen atom, or Si-bonded halogen atom, R 3 may be identical or different and denotes a monovalent, optionally substituted hydrocarbon radical, d is 0, 1 or 2, e is 0, 1, 2 or 3 and f is 0, 1, 2 or 3, with the proviso that in formula the sum d+e+f≤4, in the organosilicon component f≥1 in at least 10% of all the units of formula, in the organosilicon component e≥1 in not more than 2% of all the units of formula, and in the organosilicon component, in at most 50% of the units of formula with d+e+f≤3, d=2, and d is 0, 1 or 2, e is 0, 1, 2 or 3 and f is 0, 1, 2 or 3, at least one filler.