Expert Guide: 5 Key Factors When Choosing an Industrial Sealant

Choosing the right industrial sealant is critical—incorrect selection or application can lead to costly failures.

Here are five key factors to guide your choice:

1. Wide‑temperature stability – High‑quality sealants must perform across a broad range, typically from –85 °F (–65 °C) to 599 °F (315 °C). Selecting a product that remains reliable beyond the expected extremes protects against unexpected temperature swings.
2. Weather and chemical resistance – UV, radiation, and harsh chemicals can crack or degrade low‑quality sealants. Opt for formulations that resist weathering and resist reactions with common pollutants and industrial chemicals.
3. Bond strength – Durable adhesion to glass, ceramics, wood, masonry, metals, and plastics depends on chemistry, cure type, and substrate penetration. A high‑bond sealant ensures long‑term integrity.
4. Electrical properties – For electrical applications, many organic sealants are unsuitable. A premium silicone sealant offers superior dielectric performance and reduced risk of electrical failure.
5. Low flammability – Fire‑resistant sealants, such as silicone meeting UL 94 V‑0, minimize burn risks and help comply with safety standards.

Always select a sealant that meets the highest temperature you anticipate and maintains flexibility at lower ranges. When in doubt, consult a qualified expert.

About the author: Ross Noel is a senior applications engineer at Dow Corning, supporting IAM (Industrial Assembly and Maintenance) and automotive sealant applications.