... middle-and-low grade natural synthetic rubber, paint, silicone fluid sealant, glass fibre reinforced plastic, thermal insulat HL-150 is applied to middle ... and-low grade natural synthetic rubber, paint, silicone fluid sealant, glass fibre reinforced plastic, thermal insulator,etc.! Mainly get up and ... becoming, defending sinking; Auxiliary of processing; Freedom flowability,etc.. White Carbon Black