What is the difference between PTFE tape for gas and water?

What is the difference between PTFE tape for gas and water?

PTFE tapes for gas and water applications may differ in thickness, density, dimensions, manufacturing specifications, testing, and certification.

General-purpose water tape is designed primarily for plumbing and water pipe connections, while gas-grade PTFE tape is intended to meet the performance and regulatory requirements of applicable gas systems.

The tape color can help identify different product categories, but suitability should always be determined by the product specifications and approvals rather than color alone.