- The information below is general estimate when used in an air-tight sealed container.The amount of silica gel needed will depend on several factors: 1. Chemical properties of the product that will be used: 2. Volume of the container 3. Conditions and physical properties of the container Container volume – packet size 120 cubic inch - 1 gram 240 cubic inch - 2 gram 360 cubic inch - 3 gram 600 cubic inch - 5 gram 5 Gallon bucket - 10 gram 2 cubic feet - 30 gram 4 cubic feet - 60 gram 8 cubic feet - 120 gram * We always recommend placing extra packets than recommended to cover the factors mentioned above and for extra protection.