Overview
The video compares two types of automotive sound deadening materials—Dynamat Extreme and Amazon Basics—by evaluating their installation process, noise reduction effectiveness, and cost efficiency using a series of in-car sound tests.
Baseline Sound Test
- An initial sound level test at 100 km/h measured between 71 and 73 dB inside the car.
- The test establishes a reference to evaluate the effectiveness of the materials.
Installation Process and Product Comparison
- Sound deadening material was applied directly to the section under the hood, not the secondary section.
- Surface preparation (removal of grease and dirt, ensuring room temperature) is crucial for proper adhesion.
- Both products are made from butyl with an aluminum backing and self-adhesive side.
- The Dynamat Extreme was found to be stickier and more flexible than the Amazon Basics option.
- A roller tool is recommended for better installation and adhesion.
Sound Test Results
- After applying Dynamat Extreme, noise levels dropped marginally by about 1 dB.
- The Amazon Basics material was less flexible but adhered reasonably well after installation and engine heat exposure.
- The noise reduction with Amazon Basics was nearly identical to that of Dynamat Extreme.
Cost Analysis
- Dynamat Extreme costs significantly more (about $200–$300 for a car) than Amazon Basics ($80–$100 for similar coverage).
- Amazon Basics offers 10 sheets for around $20, making it very budget-friendly for larger projects.
Conclusions and Recommendations
- Both Dynamat Extreme and Amazon Basics provided similar sound deadening performance with minimal difference in measured cabin noise reduction.
- Given the substantial price difference, Amazon Basics is recommended for those seeking cost-efficient sound deadening on a budget.
- Sound deadening materials reduce, but do not eliminate, cabin noise; results are more noticeable on noisier vehicles.