Which characteristic is NOT desirable in gasket materials?

• A. Resilient to maintain seal
• B. Water soluble
• C. Thick and wide enough to be effective
• D. Must not degrade

Answer: (B)

Gaskets must stay in place and keep a seal under real-world conditions. That means the material needs to be resilient so it compresses to fill gaps and then returns toward its original shape as loads or temperatures change, preserving the seal. It also needs to be thick enough to provide a continuous barrier and fill the joint properly, within design limits. Most importantly, it should resist degradation from the fluids, temps, and stresses it encounters, so it doesn’t crack, crumble, or wash away over time. Water solubility undermines all of this: if the gasket dissolves in moisture, it can no longer maintain a seal, leading to leaks.