Instruction of use 1. Stir the base (Part A) well before use (except when machine dispensing).
2. Shake the catalyst container (Part B) well before use.
3. Weigh the desired amount of base into a clean mixing container. Tip the container and roll
the base all the way around the side wall up to two inches from the top. This will prevent the
catalyst from becoming absorbed into the container. It is recommended that the container be
filled to not more than 1/3 the container depth to allow sufficient room for expansion during
the deaeration procedure.
4. Weigh the proper amount of catalyst into the container. Mix the base and catalyst together
by stirring with a stiff, flat ended metal spatula until a uniform color is obtained. Scrape the
container walls and bottom well to insure a thorough mix.
5. Place the container into a vacuum chamber and evacuate the entrapped air from the mixture
using a vacuum pump capable of achieving 29 inches of mercury vacuum. The mixture will rise,
crest and then collapse in the container. Interruption (bumping) of the vacuum may be
necessary to prevent overflowing the container. Keep the mixture under full vacuum for 2-3
minutes after the material has receded in the container.
6. Bleed air slowly into the vacuum chamber. When the chamber is at atmospheric equilibrium,
remove the cover plate and take out the container.
7. Pour the deaired material slowly in a steady stream from one end of the mold box so that the
material flows evenly over the pattern. This should minimize entrapment of air bubbles under
the flowing material. A “print” coat may be poured first over the pattern which will also help
reduce the possibility of entrapping air on the pattern and in the cured rubber. A mold release
(petroleum jelly) may be applied on the pattern first to improve release.
8. Allow the rubber to cure for 16-24 hours at 75±5°F (24°C) before removing the cured rubber
mold from the pattern. Heat acceleration is not recommended with this product.
9. For best results, allow the mold to air cure an additional 24 hours before using it in
production. Full cure is achieved in 3-7 days.
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