To gain a clearer understanding of Room Temperature Vulcanized (RTV) two-component silicone, it’s helpful to address some frequently asked questions.
- What is RTV 2?
RTV 2 is a two-component silicone rubber that, when mixed together, cures at room temperature. The term “RTV” stands for Room Temperature Vulcanization. - Is mold release necessary?
Yes, mold release is essential, both for the original model and when separating the two halves of the silicone mold. - Is degassing necessary before pouring?
Yes, degassing is recommended. By removing excess air, the silicone will capture finer details and achieve stronger physical properties. However, degassing does not affect the curing process. - Is it necessary to weigh the silicone product?
Yes, silicone rubber products are formulated to cure based on precise weight measurements. - Does temperature affect the silicone and curing process?
Yes, temperature plays a role. For addition-cure silicone, the curing and working times will be influenced by the temperature—without heat, the cure time will increase. - What causes condensation to appear “wet” at the interface?
Condensation curing silicone rubber relies on moisture in the air to cure. During the manufacturing process, some of the moisture may evaporate, resulting in a “wet” appearance. To resolve this, you can add a small amount (around 0.05%) of water and mix it evenly with the product. - How can I speed up the curing process?
For addition-cure silicone, higher temperature or pressure will speed up curing. However, keep in mind that reducing cure time will also shorten the available work time.
By understanding these key aspects, you can use RTV silicone more effectively in your projects.