Mineral wool is used for

• A. Fireproofing
• B. Sealing hot application insulation
• C. Soundproofing
• D. Sealing cold application insulation

Answer: (D)

In cold-service insulation, the goal is to minimize heat transfer and control condensation on cold surfaces. Mineral wool fits this purpose well because it maintains strong thermal resistance even at low temperatures and provides a dense, workable barrier that can seal gaps around cold pipes and equipment when installed with the right coverings. Its noncombustible nature also adds safety in various environments. So, for sealing cold application insulation, mineral wool offers reliable thermal performance and a solid seal, which is why it’s the best choice. While it can contribute to fireproofing and some sound insulation, its behavior in cold service makes it especially suitable for sealing cold insulation.