Specifications: 1) GR101 / 20 / 301 / 401 are acid cure gasket maker 2) GR101, red gasket maker, use on automobile / motor cycle\'\'s engine, valve, and such joint cover of rigid flange 3) GR201, black gasket maker, instant dry, same use like GR101 4) GR301, grey gasket maker, same use like GR101 5) GR401, blue gasket maker, same use like GR101 and spcial recommended for oil shell bottom cushion, pump cushion, gear-box botton cushion 6) GR601 / 602 / 630 are neutral cure gasket maker 7) GR601, red gasket maker, spcial recommended for high temperature places in the industry, heating pipeline, high-temp reactor 8) GR602, black gasket maker, use on bonding and sealing for gas engine parts and other machinery, surface sealing for auto and machines 9) GR603, blue gasket maker, use on various machines and electric equipment