Casting with Liquid Latex
Liquid latex is ideal for creating flexible molds for a variety of applications. You can either brush it onto the model with a standard or silicone brush, or dip the object directly into the latex. The number of layers required depends on the size and complexity of the object, whether you use a thickener, and if a support mold is used. When applying multiple layers, ensure each layer dries completely before applying the next. As the latex dries, it will turn slightly yellow.
Using Thickener:
To reduce the number of coats needed, you can mix 1–5% Thickener into the latex after applying the initial layers, depending on the desired viscosity. This makes the latex thicker and allows for applying heavier layers. Allow extra drying time for latex mixed with Thickener. Note: latex will continue to thicken over time when mixed with Thickener, so it’s recommended to mix fresh batches as needed.
Finalizing the Mold:
Once your mold reaches the desired thickness and the last layer has dried, it is ready for use. Flexibility can be further enhanced by placing the mold in a tumble dryer or oven at 70°C for 2 hours. Ensure the air is humid; place a wet towel in the dryer or a bowl of water in the oven to maintain moisture.
Brush Selection and Cleaning:
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For natural bristle brushes: coat with mild detergent before use, clean with water and a stiff brush after use, and store in a sealed bag with some diluted detergent for next time.
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For silicone brushes: simply allow the latex to dry and peel off easily from the silicone surface.
Important: liquid latex should never be poured down the drain.
Tinted Latex:
If you want to color you latex, our color pigments can be mixed in to achieve the desired shade.
Shelf Life:
6 months from the purchase date when stored correctly.
Guide to Creating a Latex Mold:
Please note that liquid latex cures by air-drying, which means it cannot be used for pour-casting around the object you want to replicate. For casting by pouring material around the model, we recommend using our Liquid Silicone instead.
Latex molds are also compatible with all types of casting concrete. Certain concrete mixtures generates high heat during the curing process, which can cause the latex mold to soften and become tacky. For heat-intensive materials, use silicone molds for optimal durability and release properties.
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