3M Thinsulate (TM) SM400L Acoustic Thermal Automotive Insulation for van and car

3M SM400L sound thermal insulation engineered for vehicles. 60″ wide, scrim on one side. 1 linear foot is 5 square feet. Material comes compressed from 3M. The material will expand to 1 inch. Thinsulate is FMVSS 302 certified (federal motor vehicle safety standard).

We recommend using 3M 90 Adhesive Spray to apply the white fiber side to the Van skin.

We also sell 3M SM600L which is the thickest grade engineered for vehicles. It is item number
131754566187 or go to the other items below to see our products.


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