21" x 4” x 1" Large Rectangle Mold

Final Cast Dimensions:Length: 21"Width: 4"Height: 1"Surface Finish: Smooth/Shiny/Please message us with any questions you may have regarding this mold.**Please note this listing is for the silicone mold ONLY. Our Smoothon Mold Star silicone molds cure to soft, strong rubbers which are tear resistant and exhibit very low long term shrinkage. Our molds will last a long time in your mold library and are good for resin, concrete, wax, gypsum and other materials. The molds are heat resistant up to 450 degrees Fahrenheit or 232 degrees Centigrade. They are suitable for casting low temperature melt metal alloys.SILICONE MOLD CARE INSTRUCTIONS• DON’T TOUCH the inside shiny part of the mold. This will cause permanent scuffs that will show in your final cast.• Use scotch tape to gently clean the mold. Tap the spot lightly where there are loose particles.• USE EXTREME CAUTION when using a torch/heat gun to pop bubbles in the resin. It may rip the mold upon demolding your fully cured resin. Instea