Group Assignment – Molding and Casting - CDMX

We used two products:

 Smooth-On PMC 770

Smooth-On Vytaflex 30

Safety Datasheets

PMC770

Basically what this means is that you shouldn’t swallow or touch directly this substance. Also it is dangerous to breathe it so, use in well ventilated areas and use respirator.

Vytaflex 30

Again, this product should be used with a lot of care not to otuch, swallow or brathe its fumes.

This is the mould we used for our test castings, we mixed 30ml of each substance and we used the Smooth On universal mold release.

This is the instructions from the website:

PMC770

Preparation - These products have a limited shelf life and should be used as soon as possible. Materials should be stored and used at room temperature (73°F/23°C). Humidity should be low. Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Good ventilation (room size) is necessary.770

This is the instructions from the website:

PMC770

Preparation - These products have a limited shelf life and should be used as soon as possible. Materials should be stored and used at room temperature (73°F/23°C). Humidity should be low. Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Good ventilation (room size) is necessary.770

TVytaflex 30

Preparation - Store and use at room temperature (73°F/23°C). These products have a limited shelf life and should be used as soon as possible. Use in a low humidity environment (below 50% RH). Mixing containers should have straight sides and a flat bottom. Mixing sticks should be flat and stiff with defined edges for scraping the sides and bottom of your mixing container. Good ventilation (room size) is essential. Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk.

These are the finished parts:

PMC770

TVytaflex 30

Comparison

In general, PMC770 is much harder, it is a urethane rubber. Vytaflex is softer to the touch, it is a silicone product. They are both very easy to use to make molds.