MEASURING & MIXING...
Use SO-FLEX® by weight: For best results, you should use an accurate scale to properly use SO-FLEX® with PMC®-121/50, PMC®-744, Vytaflex® or any other flexible Smooth-On polyurethane product. SO-FLEX® should be weighed and thoroughly mixed (at least one minute) with the appropriate amount of Part B before combining with Part A.
Softening PMC®-121/50 with SO-FLEX® - Normally, PMC®-121/50 cures to a hardness of Shore A 50. PMC®-121/50 can be made softer and more flexible by adding different percentages of SO-FLEX® as indicated below.
Part B | SO-FLEX® | Mix Thoroughly | Part A | Hardness |
50 g | 0 g | Mix | 50 g | Shore 50A |
50 g | 20 g | Mix | 50 g | Shore 43A |
50 g | 40 g | Mix | 50 g | Shore 35A |
50 g | 50 g | Mix | 50 g | Shore 30A |
Using SO-FLEX® by volume with PMC®-121/50: If you want to add SO-FLEX® by volume instead of by weight, you can do so by measuring out equal amounts of parts A, B or SO-FLEX®. As indicated above, this will result in a cured Shore A hardness of 30.
Softening PMC®-744 with SO-FLEX® - Normally, PMC®-744 cures to a hardness of Shore A 45. PMC®-744 can be made softer and more flexible by adding different percentages of SO-FLEX® as indicated below.
Part B | SO-FLEX® | Mix Thoroughly | Part A | Hardness |
50 g | 0 g | Mix | 100 g | Shore 45A |
50 g | 20 g | Mix | 100 g | Shore 40A |
50 g | 40 g | Mix | 100 g | Shore 35A |
50 g | 50 g | Mix | 100 g | Shore 30A |
Softening Vytaflex® 10 with SO-FLEX® - Normally, Vytaflex® 10 cures to a hardness of Shore A 10. Vytaflex® 10 can be made into a much softer and more flexible ‘gel’ type material by adding different percentages of SO-FLEX® as indicated below.
Part B | SO-FLEX® | Mix Thoroughly | Part A | Hardness |
50 g | 0 g | Mix | 50 g | Shore 10A |
50 g | 10 g | Mix | 50 g | Shore 00-62 |
50 g | 20 g | Mix | 50 g | Shore 00-50 |
50 g | 50 g | Mix | 50 g | Shore 00-30 |
Note: The softened Vytaflex® 10 will be ‘tacky’ when cured. This tackiness can be eliminated by applying baby powder or talc to the surface of the cured rubber.