Clear Casting Resins

Clear Flex (RU-550 A/B)

RU-550 A/B is a 45A, clear urethane castible rubber with good impact resistance. Developed for applications where parts are to be tinted but require high clarity and flexibility.  Because of building exothermal reaction, size of parts may be limited. Castings are Non-UV stable and will slightly discolor over time.

Color: Transparent
Durometer, Shore A: 45A
Viscosity Mixed: 1200 cps
Mix Ratio: 100 A/ 100 B (By Weight or Volume)

Elongation: 850%
Tensile Strength: 610 psi

Pot life: 20-30 min.
Demold Time: 16 hr
*Full Properties will develop over 48 Hr

Mixing Instructions:

Mix A & B by the above ratio and de-air or pressurize in mold to remove air from the mixing process. The area where the RU-550 is processed should be controlled to eliminate dust and particles from mixture. Clear castings are sensitive to any foreign materials or air bubbles, which may appear during exothermic reaction if not processed properly. Clean stirrers and mixing containers should be used. RU-550 should be sealed and stored in a dry area.

Casting:

RU-550 A/B must be cast in Platinum Silicone Molds or in a properly processed Tin Silicone Mold (R-1300 Series) that has been post cured at 150-200F for 4-6hours.  Small and thin pieces will require a post curing in an oven or hot box at 100-140F  for 30-60 minutes. MS-122 may be used as a light coat for a mold release. RU-550 A/B is a flexible rubber, which cannot be polished. One piece molds are recommended to eliminate parting lines.

The information and data contained herein are based on information we believe reliable. Each user of the material should thoroughly test any application and independently conclude satisfactory performance before commercializing. Suggestions of uses should not be taken as inducements to infringe on any particular patent.