Which item ensures the AvSax containment kit is effective?

The effectiveness of the AvSax containment kit is primarily ensured by a vacuum seal. This sealing mechanism is crucial because it prevents the leakage of hazardous materials contained within the kit, thereby ensuring that contaminants do not escape and pose a risk during a potential emergency. A vacuum seal maintains a secure environment for the contents, allowing for safe handling and transportation of hazardous materials without the danger of exposure.

While aspects like heat-resistant gloves, water supply, and clear labeling contribute to overall safety and usability in specific contexts, the vacuum seal specifically addresses the critical need for containment and safety regarding potential spills or leaks in the event of an onboard incident. The integrity of the seal directly impacts the kit's ability to protect passengers and crew from hazardous substances.