CAD/CAM LMR RTV Clear Mold Rubber is a premium, water-clear translucent silicone designed for creating detailed, flexible molds for jewelry, prototypes, and other precision applications. The clear formulation allows you to see the model through the mold, making it especially useful for intricate designs and challenging mold configurations. With a Shore 40A hardness, high tear strength, negligible shrinkage, and a 60-minute working time, this platinum-cure silicone produces durable molds with excellent detail reproduction.
Safety Data Sheet
How to Make a Clear Silicone Mold
A step-by-step guide to measuring, mixing, pouring, curing, and demolding with CAD/CAM LMR RTV Clear Mold Rubber.
What You'll Need
Two-part platinum-cure silicone rubber.
For accurately measuring Parts A and B.
Use a clean container and mixing tool.
Your pattern and a suitable containment area.
Recommended for removing trapped air.
Safety glasses and vinyl gloves.
From Model to Mold
Prepare Your Model
Make sure the model is clean, dry, and free from contaminants that could interfere with the silicone cure.
Some materials can cause platinum-cure silicone to remain tacky or uncured. When compatibility is uncertain, perform a small test first.
Measure the Silicone
Bring the material to room temperature, approximately 73°F (23°C), before use.
Accurately weigh Parts A and B using a gram scale according to the specified mix ratio.
Mix Thoroughly
Pre-mix Part B before combining.
Mix Parts A and B thoroughly for approximately 3 minutes. Scrape the sides and bottom of the container several times while mixing to ensure the components are completely incorporated.
Remove Air
Vacuum degassing is recommended for the best results.
Place the mixed silicone in a vacuum chamber and allow the material to rise, break, and fall. Continue vacuuming for approximately 1 minute after the material collapses.
Pour the Mold
Pour the silicone slowly into the mold box.
For best results, pour from one location at the lowest point of the containment area and allow the silicone to flow naturally around the model. A slow, consistent pour helps minimize trapped air.
Allow to Cure
Leave the mold at room temperature until fully cured.
Demold & Start Casting
Once fully cured, carefully remove the silicone mold from the model.
The clear/translucent material makes it easier to see the model inside the mold and determine where cuts or separations should be made.
New silicone molds naturally provide good release characteristics. For wax and gypsum, a release agent is generally not necessary.
Safety & Handling
Use in a properly ventilated area. Wear safety glasses, long sleeves, and vinyl gloves when handling the material.
Do not use latex gloves. Latex can interfere with the curing process.
Always test material compatibility on a small, non-critical area before committing to a full mold.
- Brand: Romanoff
- Appearance: Clear
- Shrinkage: 0.0%
- Size: 10 lb Kit
- Country of Origin: United States
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