TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The reactive diluent is a low-molecular compound with only one (meth)acrylate-, (meth)acryloyl-, (meth) acrylate ester- or (meth)acrylate amide-residue. The photoinitiator is benzoin ether, substituted acetophenone, substituted alpha-ketol aromatic sulfonyl chloride or oxime.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The elastomer mixture further comprises: a filler; and aging protection agent, dye, pigment, flame retardant, softener and/or bonding agent. Preferred Components: The low viscous polymer is: acrylate rubber, acrylate-copolymer-rubber or acrylonitrile/butadiene-rubber; ethylene/propylene/diene-copolymer, polyisoprene, polybutadiene, polyisobutylene, polyisobutylene-copolymer, isoprene/butadiene copolymer, isoprene/styrene copolymer or butadiene/styrene-copolymer; a polymer modified with (meth)acrylate-residue or (meth)acryloyl-residue. The low viscous polymer is hydrogenated or partially hydrogenated. The low viscous polymer exhibits an average molecular weight of 10-500 kDa. The radiation-cross-linkable functional groups of the low viscous polymer are (meth)acrylate-residue, (meth)acryloyl-residue, nitrile-residue, carbon-carbon double bond or carbon-carbon triple bond. The filler is bright filler and the elastomer mixture contains both minerals and organic fillers as well as silicic acid, preferably pyrogenic, hydrophobic silicic acid. The particle size of the filler lies below the radiation wavelength used for the cross-linking. The elastomer mixture contains a composition comprising 30-90% of low viscous polymer, 1-50% of reactive diluent, 0.1-5% of photoinitiator, 0-65% of filler and 0-20% of other additives. EXAMPLE - Typical elastomer mixture composition comprised (in parts by weight) of: polyacrylate liquid elastomer (100); filler such as hydrophobic, pyrogenic silicic acid (20); phenolic aging protection agent (1); propriophenone-photoinitiator (0.6); phosphinate-photoinitiator (0.3); and acrylate (10).