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What causes the cracking of silicone sealant? How to deal with these problems?


When using silicone sealants, cracking may occur. The reason may be related to the quality, and there may be problems in the application process. Users please don't worry, find the reason and find the correct solution.

Cracking due to quality reasons

1. During use, after the silicone sealant suffers excessive shrinkage or loses its displacement function, it cannot be displaced according to the actual situation of the bonding substrate. In these cases, cracking naturally occurs. Cooperate with powerful suppliers, such as TENSAN, which focuses on silicone sealant research and provides customized silicone sealant application solutions. It has a wide range of uses and can be used in new energy, military, medical, aviation, shipbuilding, and electronics. , automobiles, instruments, power supplies, high-speed rail and other industries.

2. When used, the content of crosslinking agent is not enough to make the silicone sealant react quickly, resulting in obvious structural defects and cracking.

3. The adhesive used has exceeded the shelf life, cannot exert the bonding strength and hardness, and naturally cracks.

Incorrect application method leads to cracking

1. Bubbles appeared during glue injection, and no degassing treatment was performed, resulting in cracking.

2. When the glue is injected, there are thin and thick, and the uneven thickness will directly lead to cracking.

3. The construction temperature is abnormal, and glue is injected at high or low temperature, resulting in cracking.

4. When it is cured, it is affected by external force, which makes the colloid crack and cannot form a round adhesive layer.

Unreasonable applicability leads to cracking

1. Failure to select a suitable sealant according to the demand for joint displacement, resulting in cracking.

2. The sealant and the substrate cannot be tightly bonded together, and it is easy to peel off or crack.

How to solve the cracking phenomenon of silicone sealant?

Select high-quality sealant, and construct in an environment with suitable temperature and humidity. Let it cure naturally in a safe and clean environment, and don't be affected by external factors.

For many reasons, the silicone sealant cracks and cannot be used normally. It is recommended that users find the real reason to reduce the chance of cracking.

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