Products
Brush-On Latex Rubbers
Latex rubber provides a durable mold rubber for casting plaster & cement products, and is also used for making masks, animatronic skins, and appliances in the Special Effects industry. Latex is a water-ammonia mixture that can be brushed, dipped, sprayed or slush casted. Latex needs to semi dry between coats as multi layer molds or parts that are being created.
Brush-On Molds
- RL-451-80 Industrial Mold making, High Solids(74%), No Odor latex for high quality molds and quicker dry time.
- RL-451-70 Good Mold making latex with low ammonia odor.
- RL-461 Economical, General purpose, low cost mold making latex.
Accessories
- RL-Thinner Add to adjust latex thickness
- RL-400 T Ground black organic rubber used for plugging undercuts in molds
- RL-CS Dry powder release agent for cement parts
- R-100-50 Liquid release agent for casting cement and plaster
- Paste Wax Formula five wax used to separate mother molds made of resin
- Plaster Cast Shell Plaster & Hemp for mother molds
- Burlap Cloth used for reinforcement
- Cheese Cloth Very thin draping reinforcement material
Instructions: Mold Making
Fasten the part to be molded to a firm base so as to avoid handling piece during brushing process—No release is necessary in most cases unless part is highly porous then sealer may be applied of wax. When brushing on latex, care should be taken to brush out all bubbles to assure a smooth, detailed first thin coat so void-free positives can be made. Brush from the top of model to bottom then continue on out from base, a distance of about 1.5” - 2”, to create a supporting flange. Continue to build-up flange with each successive layer of latex. When dry, this flange provides a very definite aid in the handling of mold during casting process.
After the first coat has become dry to the touch( rubber will change to darker color), subsequent coats may be added allowing each coat to dry before applying next coat. Depending on environmental conditions the drying time will change from hours to portion of a day—4 to 16 hours. Drying time can be improved by the use of heat and moving air over the surface. Each additional coating should be brushed in alternating directions (top to bottom, right to left, diagonally) with a checkerboard layer in between so a laminated structure is created. Applying this technique reduces the dimensional shrinkage of the finished mold. Molds vary in thickness from 8-30 coats depending on desired thickness and latex system used. Cloth can be used for fast mold build ups.
For deep undercut areas, use RL 400T (plugging filler). Add to latex system until desired paste is created— a thick peanut butter like consistency—and apply to latex mold deep pockets. Once area is filled and allowed to dry, usually within the hour, brush a final coat of straight latex to seal up area.Now let mold full dry, hot box can shorten dry time. For further information, please contact technical support @ 909-625-0056.
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.