Q & A: Platinum Cured Silicone Rubber (120 comments)
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2025-03-22
Melissa
How do I make sure I've mixed my silicone thoroughly?
Follow the "two-container" mixing method for a perfect mix : 1. In your first container, mix Parts A and B for at least one minute. 2. During mixing, repeatedly and vigorously scrape the sides and bottom of the container to pull any unmixed material into the center. 3. For best results, pour the entire mixture into a second, clean container. Using a clean stir stick, mix again briefly. This ensures that any material that was clinging to the walls of the first container gets fully incorporated.
Follow the "two-container" mixing method for a perfect mix : 1. In your first container, mix Parts A and B for at least one minute. 2. During mixing, repeatedly and vigorously scrape the sides and bottom of the container to pull any unmixed material into the center. 3. For best results, pour the entire mixture into a second, clean container. Using a clean stir stick, mix again briefly. This ensures that any material that was clinging to the walls of the first container gets fully incorporated.
2025-03-21
Nestor
How should I store unused liquid platinum silicone?
Keep the lids tightly sealed on both Part A and Part B containers. Store them in a cool, dry place away from direct sunlight, at a consistent room temperature between 15-25°C (60-77°F). Storing at high temperatures can significantly shorten the product's shelf life. If the material becomes thick in cold storage, simply allow it to return to room temperature before use.
Keep the lids tightly sealed on both Part A and Part B containers. Store them in a cool, dry place away from direct sunlight, at a consistent room temperature between 15-25°C (60-77°F). Storing at high temperatures can significantly shorten the product's shelf life. If the material becomes thick in cold storage, simply allow it to return to room temperature before use.
2025-03-20
Stanley
Does humidity affect platinum silicone curing?
Generally, no. The addition cure reaction of platinum silicone does not rely on atmospheric moisture, so humidity has little to no effect on its cure time . This is a key difference from tin cure silicone, which requires moisture from the air to cure and thus cures faster in high humidity.
Generally, no. The addition cure reaction of platinum silicone does not rely on atmospheric moisture, so humidity has little to no effect on its cure time . This is a key difference from tin cure silicone, which requires moisture from the air to cure and thus cures faster in high humidity.
2025-03-19
Hugh
How much does temperature really affect platinum silicone?
Temperature has a dramatic effect. A general rule of thumb is that for every 10°C increase in temperature, the cure time is cut in half. Conversely, lower temperatures will significantly lengthen the cure time. It's critical to note that below about 15°C (60°F), the curing reaction becomes extremely slow and may even stop completely, leading to cure failure . The ideal working temperature is around 23-25°C (73-77°F).
Temperature has a dramatic effect. A general rule of thumb is that for every 10°C increase in temperature, the cure time is cut in half. Conversely, lower temperatures will significantly lengthen the cure time. It's critical to note that below about 15°C (60°F), the curing reaction becomes extremely slow and may even stop completely, leading to cure failure . The ideal working temperature is around 23-25°C (73-77°F).