SO-FLEX™ II is a phthalate free is a softening agent that will lower the cured durometer of a variety of Smooth-On flexible polyurethane products. The following charts indicate the effect SO-FLEX™ II has on various fully cured (7 days at 73°F/23°C) urethane rubbers when added as a percentage of the total mix. Instructions Safety – Use in a properly ventilated area (“room size” ventilation). Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Store and use products in a warm environment (73°F / 23°C). This product has a limited shelf life and should be used as soon as possible. Wear gloves and eye protection to minimize risk of contamination. MEASURING & MIXING... Use SO-FLEX™ II by weight: For best results, you should use an accurate scale to properly use SO-FLEX™ II. SO-FLEX™ II should be weighed and thoroughly mixed (at least one minute) with the appropriate amount of Part B before combining with Part A. Brush-On™ 40 100A:125B pbw Part B SO-FLEX™ II Mix Thoroughly Parts A Shore A Hardness 125 g 0 g Mix 100 g 40 125 g 10 g Mix 100 g 35 125 g 20 g Mix 100 g 30 125 g 40 g Mix 100 g 20 PMC™-121/50 2A:1B pbw Part B SO-FLEX™ II Mix Thoroughly Parts A Shore A Hardness 100 g 0 g Mix 200 g 50 100 g 15 g Mix 200 g 44 100 g 30 g Mix 200 g 39 100 g 60 g Mix 200 g 31 PMC™ 780 DRY 2A:1B pbw Part B SO-FLEX™ II Mix Thoroughly Parts A Shore A Hardness 100 g 0 g Mix 200 g 80 100 g 15 g Mix 200 g 73 100 g 30 g Mix 200 g 69 100 g 60 g Mix 200 g 60 Reoflex™ 20 1A:1B pbw Part B SO-FLEX™ II Mix Thoroughly Parts A Shore A Hardness 100 g 0 g Mix 100 g 20 100 g 10 g Mix 100 g 17 100 g 20 g Mix 100 g 13 100 g 40 g Mix 100 g 6 Vytaflex™ 10 1A:1B pbw Part B SO-FLEX™ II Mix Thoroughly Parts A Shore A Hardness 100 g 0 g Mix 100 g 10 100 g 10 g Mix 100 g 6 100 g 20 g Mix 100 g 4 100 g 40 g Mix 100 g not recommended Vytaflex™ 20 1A:1B pbw Part B SO-FLEX™ II Mix Thoroughly Parts A Shore A Hardness 100 g 0 g Mix 100 g 20 100 g 10 g Mix 100 g 18 100 g 20 g Mix 100 g 16 100 g 40 g Mix 100 g 12 Vytaflex™ 30 1A:1B pbw Part B SO-FLEX™ II Mix Thoroughly Parts A Shore A Hardness 100 g 0 g Mix 100 g 30 100 g 10 g Mix 100 g 27 100 g 20 g Mix 100 g 20 100 g 40 g Mix 100 g 16 Vytaflex™ 60 1A:1B pbw Part B SO-FLEX™ II Mix Thoroughly Parts A Shore A Hardness 100 g 0 g Mix 100 g 60 100 g 10 g Mix 100 g 55 100 g 20 g Mix 100 g 47 100 g 40 g Mix 100 g 36 Note: * Shore Hardness measured after 7 days at 73°F/23°C SDS