Latex
Latex-Acrylic Rubber (RL-561)
RL- 561 is formulated as a low viscosity casting latex used to produce firm rubber products. Doll heads, props, and thin, slightly flexible parts are created by slush casting in plaster molds. Part thickness can easily be controlled by increasing or decreasing soak times. Fill plaster with solution, cover, let stand 1 hour to build thickness of 1/16”. RL-561 will reproduce detail but has a slight shrink rate. Parts can either be painted with water/acrylic paints or colored with latex pigments.
Physical Properties:
Latex Solids: 52%
Color: Off White
Hardness (cured): 70 A Shore
Accessories
- RL-Thinner added to adjust latex thickness
- Pigments: Red, Blue, Yellow, Black, White
- Flexible and Rigid Urethane Foams for back fill
- Ultracal 30 Plaster for making slush casting molds
Instructions:
Slush casting with RL 561 requires a mold made from dry, unsealed plaster like Ultracal 30. After mold is made, oven dry it at 150f for several hours (this will give plaster mold the best water absorption ability). Allow mold to cool, then fill mold cavity up with latex--reseal the container to avoid evaporation and thin skin build-up from exposure to air. RL-561 will thicken against mold surface as plaster absorbs water. Allow compound filled mold to sit 1-2 hours, depending on desired thickness, before pouring excess latex material back into container. Latex is then allowed to dry in mold for 24-36 hours at room temperature. Accelerated cure can be achieved by oven drying at 200-240f for 1 hour. Remove material and repeat process. Molds may need to be oven dried after a given amount of pieces, which will be noticed as parts become thinner as mold loses its absorption ability.
Important:
Avoid using petroleum based products and solvents with latex rubber. Keep cured latex rubber out of direct sunlight. Do not allow liquid material to freeze.
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.