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4 years ago

KEIM Lignosil

  • Text
  • Keim
  • Lignosil
  • Mineral
  • Silicate
  • Coating
  • Coatings
  • Durable
  • Wooden
  • Interior
  • Limited

k e i m lignosil ® –

k e i m lignosil ® – mineral p a i n t for w o o d 7 CONVENTIONAL WOOD COATINGS INNOVATIVE WOOD COATINGS VISION AND INNOVATION Manufacturers of common wood coatings constantly introduce innovation approaches and put new products on the market. However, always using the same organic basis so that typical disadvantages like limited UV-resistance and high maintenance costs continue to be accepted. The development of a silicate paint for the organic substrate of wood is a ground-braking progress in the quality of wood coatings! THE SILICATE PAINT PRINCIPLE Silicate paints consist of inorganic binding agents, mineral fillers and inorganic pigments. Curing takes place by means of a chemical reaction between the binding agent and mineral reaction partners in the substrate forming a chemical and unsoluble bond. Silicate paints have been proven highly weatherresistant and durable on mineral building materials. They are particularly suitable for maintenance, preservation and the design of facades thanks to their typical lime-matt appearance and purely inorganic pigmented colour shades. AMBITION AND REALITY Conventional wood coatings are based on linseed oils, alkyd resins, acrylates and other plastics. They are supposed to reduce penetrating moisture and the disintegration of lignin by UV-light. However, binders of organic coatings show a restricted UV-resistance. This property first leads to discolourations or sheen changes and consequently in degradation of the binding agent. DEFICITS With a diminishing elasticity the coating becomes brittle, flakes off and loses its protective function. Moisture penetrates into the exposed areas of the wood structure, infiltrates the remaining paint coats, intensifies the “movements“ of wood and thus accelerates the destruction process. Disadvantages of those systems are: - Inadequate UV-resistance: early disintegration of the binder, changes of colour shade - Limited lifespan: cracks and spalling - High maintenance costs: short renovation intervals, labour-intesive preparations Conventional coatings for wood show a limited service life of approx. 3 to 7 years, depending on quality and stress situation. EUREKA! After 20 years of research, the developers at KEIM succeeded in transferring the “silicate paint model“ to the substrate of wood. Two proven coating materials are combined: – An oil primer with good penetration property and, – A silicate paint that protects reliably from weathering and exposure to UV-light. The result is KEIM Lignosil - the world‘s first mineral composite coating to protect wooden surfaces from weathering.