What is the best spray foam insulation for soundproofing my car?

I’ve been back and forth between using sound-deadening mats or spray foam insulation to help cancel out some of the extra noise in my car—the mats are just so expensive! I’m wary about using a spray inside my cabin, so I’m wondering what spray foam insulation is best for soundproofing a car?

Kathryn Mae Kurlychek · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
While a spray foam insulation soundproofing might sound messier than a mat, they’re actually easier and cheaper to install! Here are our top picks for the best spray foam insulation for your car: Design Engineering 050220 Boom Mat Spray-On Sound Deadening to Reduce Unwanted Road Noise and Vibration:
  • Top-rated on Amazon
  • Priced at less than $20
  • Designed for all cars
  • One can covers up to 20 square feet of space
  • Dries in 6 hours
3M Professional Grade Rubberized Undercoating, Corrosion, Water, and Salt Spray is a rubber-based soundproofing spray that comes packaged in an aerosol can for easy application. Perfect for coating:
  • Wheel wells
  • Quarter panels
  • Underneath your hood
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