Gentoo is a two-part mixture and is mixed in equal parts (1:1) of Part A and Part B by weight, not by volume. Equal sized containers are sold in equal weights for Part A and Part B.  Gentoo will need to be mixed together for a minimum of 90 – 120 minutes, depending on the temperature of surroundings, to hydrolyze the chemicals together and allow the proper reaction to occur.  Please see the instructions for more information.