NOVELTY - Biocide composition comprises a combination of at least two biocide components, where the first component contains 1,2-benzisothiazolin-3-one or N-methyl-1,2-benzisothiazolin-3-one or N-butyl-1,2-benzisothiazolin-3-one and other silver components in the form of elementary silver, and/or organic or inorganic silver salts.    USE - The biocide composition is useful: for cask- and film preservation; for the preservation of coating and paints. The composition is useful in products such as painting and coating agents, emulsions, latices, polymer dispersions, lignin sulfonates, chalk suspension, mineral slurries, ceramic masses, adhesives, sealing materials, casein containing products, starch containing products, bitumen emulsion, tenside solution, fuels, cleaning agents, pigment paste and pigment dispersions, ink, lithographic liquids, thickeners, cosmetic products, toilet articles, water circuits, liquids in -paper processing, -leather production or -textile production, boring and cutting oil, hydraulic liquids and cool lubricant. The coating and paint is a lacquer, adhesive or a color, interior color (all claimed). The biocide composition is useful for combating harmful microorganisms such as harmful bacteria, fungi or algae, e.g. Candida albicans, Staphylococcus aureus and Escherischia coli.    ADVANTAGE - The silver containing biocide composition is synergistic and exhibits a large spectrum of activity against different bacteria and fungus. The biocide composition is eco-friendly and economic. The composition exhibits a large spectrum in their long-term stability and long-term effectiveness. The individual components are used in smaller concentrations. The synergistic effect of the biocide composition was tested against Pseudomonas aeruginosa . The results showed that the combination of 3-benzisothiazolinone and silver exhibited a synergistic value of 1, which indicated the combination of 3-benzisothiazolinone and silver compounds.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) products such as painting and coating agents, emulsions, latices, polymer dispersions, lignin sulfonates, chalk suspension, mineral slurries, ceramic masses, adhesives, sealing materials, casein containing products, starch containing products, bitumen emulsion, tenside solution, fuels, cleaning agents, pigment paste and pigment dispersions, ink, lithographic liquids, thickeners, cosmetic products, toilet articles, water circuits, liquids in -paper processing, -leather production or -textile production, boring and cutting oil, hydraulic liquids and cool lubricant, containing the biocide composition; and    (2) preparation of coating and paints, comprising mixing coating and paint with biocide composition.