Smooth-On Smooth Thi-Vex Silicone Thickening Agent - 1 oz. Bottle

THI-VEX is made especially for thickening Smooth-On silicones for vertical surface application (making brush-on molds).Different viscosities can be attained by varying the amount of THI-VEX.THI-VEX is added as a percentage of Part A and must be thoroughly mixed with Parts A and B.THI-VEX will not work with Mold Max 40 or Mold Max 60 silicones.'