Which type of insulation is known for having high mechanical strength and low moisture pickup?

Urethane insulation, also known as polyurethane foam, stands out due to its high mechanical strength and low moisture absorption properties. This makes it an excellent choice for refrigeration and air conditioning applications where maintaining structural integrity while minimizing the risk of moisture-related damage is crucial.

The chemical structure of urethane foam allows it to provide effective thermal insulation while being resistant to water infiltration. Its closed-cell structure helps prevent moisture vapor from permeating the insulation, which is important in environments where condensation could pose a risk.

Additionally, urethane insulation often has good compressive strength, meaning it can withstand physical stresses without degradation. This characteristic is particularly important in applications where insulation might be subject to weight or impact, such as in ductwork or refrigeration equipment.

In comparison, while other insulation materials like fiberglass have good thermal resistance and lightweight properties, they may not offer the same level of mechanical strength or resistance to moisture saturation as urethane. Thus, urethane is often preferred when both insulation effectiveness and durability are required.