Latex
Mask Latex Rubber (RLM-460)
RLM-460 is formulated as a low viscosity latex to make quality dip & slush cast parts and masks. Latex skins are quickly built-up when slush-casting parts in plaster molds because of its higher latex solids content. Allow latex to saturate mold surface for 1 hour before drying. Latex will reproduce detail, but has the highest shrink rate of all rubber materials. RL-Thinner may be added to adjust viscosity where desired.
Physical Properties:
Latex Solids: 65%
Color : Off White
Coverage: 256 in2/lb 1/16 thick
Accessories
- Pigments Red, blue, yellow, black, and white
- RL-Thinner Add to adjust latex thickness—Better than adding just water!!
- Flex Foam 4, 6, 8 pound Urethane Flexible Foams available as filler for latex skins
- Hydrocal White Plaster for slush cast molds
Instructions:
Slush Casted latex such as a mask or a thin rubber product can be made from dry, unsealed Hydrocal White plaster mold or similar plaster. After mold is made, dry it in oven 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 and reseal the container to avoid evaporation. Latex will thicken against mold surface as plaster absorbs water. Allow latex 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 150F till rubber changes color (darkens). Remove rubber and repeat process. The use of heater guns can be used to speed up process, producing parts in hours.
Dipping rubber parts requires a positive of master made of plaster, epoxy or aluminum.
Compensate for shrinkage when building master. Dipping process can be basic dip and hung
to dry, or accelerated by the use of RL-CN(spray solution cure accelerator) and oven dried.
Spraying latex requires an industrial airless sprayer (Graco Bull Dog pump). Allow each coat to change color before applying additional coats, or spray part and oven dry between coats. Clean sprayer immediately after using and reseal latex container. RL-thinner can be used to dilute thickened latex. Cheese cloth can be used to strengthen part or mold, but will not allow rubber to stretch.
Although this latex can also be used for brush-on parts or molds, Silpak supplies latex systems specifically formulated for the brush-on process. Call for any further information.
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.