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 1150 personnel worldwide and is represented with partners in over 80 countries.     Automotive siaspeed - at full speed to a perfect surface siacarat velvet - for scratch resistant surfaces   Wood TopTec - the new generation of abrasive belts  profile siastar - the profile sanding system   Metal siastar® - the smart solution 2980 siafin -  the new 3D sanding grit   Panels siaslide Pad System -  for a higher precision siapan Hightech-belts - highest technologic standard    Composites Aerodynamic - pad siaair velvet -  for a perfect Swiss finish