Welcome to sia Abrasives The sia Group, with its headquarters in Frauenfeld, Switzerland, is one of the world's three leading suppliers of innovative abrasive systems. It develops, manufactures and markets complete abrasive systems, tailored to specific requirements and applications, for the surface treatment of every type of workpiece. These products turn sanding and grinding into surface technology. sia Abrasives employs approximately 1250 personnel worldwide and is represented with partners in over 80 countries.     Automotive siaspeed - at full speed to a perfect surface siacarat - for scratch resistant surfaces   Wood TopTec - the new generation of abrasive belts  Foam abrasives - for perfect surfaces   Metal siafleece - the perfect start to a better finish 2980 siafin -  the new 3D sanding grit   Panels siaslide Pad System -  for a higher precision siapan Hightech-belts - highest technologic standard    Composites 7241 siacarbon - the harder, the more efficient! siaair -  for a perfect Swiss finish