how to install sound deadening material in car | ASLONG Guide
How to Install Sound Deadening Material in a Car: A Professional Guide
Installing sound deadening material in a car requires precision and industry expertise. Below, we outline best practices for professionals to ensure optimal noise reduction, durability, and performance.
1. Choosing the Right Sound Deadening Material
- Butyl-based mats (e.g., ASLONG AL-300) offer superior adhesion and vibration damping.
- Closed-cell foams reduce airborne noise and thermal transfer.
- Mass-loaded vinyl (MLV) blocks mid-to-high frequency sounds.
- Consider thickness and density—thicker materials (2-4mm) provide better low-frequency absorption.
2. Preparing the Car Interior
- Remove seats, carpets, and trim panels to access bare metal surfaces.
- Clean surfaces thoroughly with isopropyl alcohol to ensure proper adhesion.
- Identify vibration-prone areas (doors, floor, trunk) for targeted application.
3. Applying Sound Deadening Material
- Cut material to size using a utility knife or scissors.
- Press firmly onto surfaces, using a roller to eliminate air bubbles.
- Layer strategically:
- First layer: Butyl mats on metal panels.
- Second layer: Closed-cell foam or MLV for additional insulation.
- Avoid over-application—excess weight can reduce fuel efficiency.
4. Post-Installation Checks
- Test for rattles by reassembling panels and driving at varying speeds.
- Inspect adhesion after 24 hours to ensure long-term bonding.
- Measure noise reduction using a dB meter for performance validation.
5. Industry Best Practices
- Use heat-resistant materials near exhaust systems.
- Prioritize door panels and wheel wells for maximum impact.
- Follow manufacturer guidelines for curing times and temperature limits.
For professional-grade materials, explore ASLONG’s sound insulation solutions, engineered for durability and superior noise control.
This guide ensures professionals achieve optimal results with efficient, industry-approved techniques. For further insights, consult SAE International’s noise control standards or acoustic engineering journals.

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FAQs
Does ASLONG provide after-sales service?
Yes, we provide a full range of after-sales services, including technical support, installation guidance, product maintenance and quality tracking, etc., to ensure that each project goes smoothly and continues to perform at its best.
What industries are the products provided by ASLONG suitable for?
ASLONG's products are suitable for multiple industries, including air conditioning and HVAC, construction and waterproofing, automobiles and transportation, home appliances and electronics, industrial equipment and machinery, etc. We provide customized solutions for each industry to meet different needs.
How to customize products that meet the needs of my industry?
You only need to contact our sales or technical team, we will conduct an in-depth analysis based on your industry needs and provide tailor-made products and solutions. We guarantee to provide you with efficient and accurate services to meet your personalized requirements.
What specific functions can ASLONG's products provide?
Our products cover functions such as insulation, sound insulation, shock absorption, waterproofing and sealing, and are widely used in improving energy efficiency, reducing noise, controlling vibration, protecting equipment, etc., helping customers optimize engineering effects and improve user experience.
Do ASLONG's products meet environmental protection standards?
Yes, all ASLONG products comply with ISO14001 environmental management system certification and global environmental protection standards. We use environmentally friendly materials and are committed to providing sustainable solutions to help customers achieve green development goals.

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