What material is preferred for sealants interacting with cargo?

The preferred material for sealants interacting with cargo is urethane. Urethane sealants are known for their excellent adhesion and flexibility, making them highly effective in a range of cargo environments. They provide strong resistance to moisture, temperature changes, and chemical exposure, which are essential properties when sealing containers that transport various goods.

Urethane's durability allows it to maintain its integrity under stress, ensuring that the containers remain securely sealed during transit. This quality helps to prevent contamination or damage to the cargo inside, which is critical for maintaining quality and safety.

While other materials such as silicone, polypropylene, and vinyl have their own properties and applications, they may not offer the same level of performance and compatibility with diverse cargo types as urethane sealants do. For instance, silicone can be less effective in adhering to certain surfaces or might not have the same chemical resistance needed in complex cargo situations. Therefore, urethane sealants are typically recommended in scenarios where cargo interaction occurs.