1. Odor: 3M's genuine thermal insulation and explosion-proof membrane will not produce odor after tearing off the isolation layer, while 3M's fake thermal insulation and explosion-proof membrane usually has pungent odor.

2. Color: Some green films on the market are printed with the trademark of 3M. 3M Company doesn't have this color of thermal insulation and explosion-proof film. Please stick thermal insulation and explosion-proof membrane to the construction shop authorized by 3M Company for construction.

3, feel: 3M company's thermal insulation and explosion-proof film will not be very sticky, counterfeit products will be much more sticky than 3M genuine thermal insulation and explosion-proof film in terms of feel.

4. External force test: the wear-resistant layer of 3M thermal insulation film will not fade under the friction of sharp tools;

Spraying carburetor cleaner on the adhesive layer of 3M thermal insulation film is not easy to fade;

The 3M watermark on the 3M thermal insulation film is not easy to be scraped off, but it can be removed by gently wiping with alcohol.

The 3M thermal insulation film is tough and not easy to tear.