Tenax Tefill kit is a dual viscosity stone repair kit. Use Tefill 1 for fissures, scratches or chips on horizontal surfaces. Use Tefill 2 to repair larger chips on both horizontal and vertical surfaces. Use Tefill 3 Activator to create the chemical reaction. Any of the Tefill products mentioned can be bought seperately or in a kit. Tefill 3 also available as an aerosol can.