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.