The Original Flexbar High Temperature Rocksett. The All-Purpose Engineering Adhesive Ceramic Cement ...One Grade Does it All! Locks, Seals & Bonds - Nuts, Screws, Shafts, Keys, Splines, Pipes, Flanges, etc. incredible Temperature Resistance (-350°F) up to 2,015°F. Electrical insulation for both A.C. and D.C. up to 20 Radio MHz. Non-Toxic- odorless - non-flammable. Rocksett withstands oil, fuels, acids, alkalis. Can only be removed with a hot water soak. Electrical insulation - for both A.C. and D.C. up to 20 Radio MHz. No Mixing or priming required.