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What is the reason for the bubbles in the silicone potting? How to solve the appearance of bubbles?


When some users poured silicone potting, they found that there were many bubbles, which affected the performance. Why do bubbles appear, and will it affect the later use effect? Take the time to understand and prevent the generation of bubbles in advance.

Why does the silicone potting have bubbles?

1. During the stirring process, air may be brought in. When air appears in the glue, it will affect the curing effect. Generally speaking, small air bubbles will appear when the air is brought in during stirring, and the size is not very large.

2. The main ingredient has been used many times, and moisture was mixed in when stirring. Or the seal is not in place, resulting in the appearance of air bubbles. The bubbles that appear for these reasons are mostly large bubbles, which are not easy to eliminate.

3. After the main agent and curing agent are mixed, they encounter moisture and react.

4. Before use, the silicone potting compound has been in contact with chemical substances such as solvents or varnishes.

How to solve the generation of bubbles?

1. During the stirring process, the main agent and the curing agent are mixed together and vacuumized.

2. Heat the sealing object in advance to automatically eliminate the air bubbles.

3. Properly reduce the curing temperature and allow more time for defoaming.

4. Put the mixed material into an oven for drying. If there are still bubbles, it means that there is a problem with the quality and it cannot be used any more. Choosing high-quality adhesives and cooperating with powerful suppliers will give you more peace of mind, such as TENSAN, which focuses on the research of silicone potting adhesives and provides customized silicone potting adhesive application solutions. It has a wide range of uses and can be used in new energy, military, Medical, aviation, shipbuilding, electronics, automobiles, instruments, power supplies, high-speed rail and other industries.

5. Store the adhesive separately and do not mix it with other chemicals.

Bubbles are also unavoidable when using adhesives. Don't worry if you encounter bubbles, find the main cause of the bubbles. To see if it is a small bubble or a large bubble, it is best to vacuum. Eliminate the small bubbles, there is no chance to become big bubbles, and it will not affect the later use.

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