Design Engineering 50220 Boom Mat Deadening Spray

Design Engineering's Boom Mat Deadening Spray 50220 is a spray-on acoustic barrier that reduces road and engine noise while improving in-car audio clarity and vibration control.

Designed for places sheet materials can’t reach, this aerosol sound deadener dries to a matte-black pebble texture, bonds to non-coated surfaces, resists heat up to 300°F, and can be painted over after about six hours. It’s sized for both targeted touch-ups and larger projects, offering quick-drying, long-lasting damping without leaving unpleasant odors when heated.

How does this spray lower noise and vibration inside a vehicle?

Boom Mat spray works by creating a damping layer that converts vibrational energy into negligible heat and blocks airborne noise paths. Applied in one or more coats, it reduces panel resonance and minimizes squeaks from flexible metal or plastic surfaces.

• Forms a dense, pebble-textured coating that deadens panel resonance
• Reduces vibration transfer from engine and road surfaces
• Effective on thin panels where mass-loading sheet products are impractical
• Seals gaps to reduce rattles and air-borne noise transmission

Where should I apply Boom Mat spray for the best results?

Use this spray in tight, irregular, or hard-to-reach spots that are difficult for sheet deadeners: trunk corners, fender wells, rear quarters, door inners, and undercarriage seams. It also performs well on non-coated metal and plastic parts and adds a moisture barrier to reduce corrosion risk.

• Trunk interiors and wheel wells for road-noise reduction
• Door cavities and inner panels to improve speaker performance
• Underbody seams and brackets to stop squeaks and rattles
• Can be layered over bare metal and painted after six hours

How fast does it dry and can I paint it to match the vehicle?

The surface typically dries to the touch in about 20 minutes under normal shop conditions. A topcoat of paint can be applied after roughly six hours, making it easy to finish visible areas to match the vehicle’s color without waiting days.

• Dries to touch in ~20 minutes — ready for additional coats
• Paintable after 6 hours for a seamless appearance
• Apply multiple thin coats for uniform coverage and best adhesion
• Works on non-coated surfaces without priming in most cases

Is this spray durable enough for engine bays and hot spots?

Yes — the Boom Mat formula resists temperatures up to 300°F, making it suitable for parts of the vehicle exposed to elevated heat. It cures to a tough, non-brittle pebble finish that resists cracking and chipping under normal automotive conditions.

• Heat resistant up to 300°F for engine-adjacent applications
• Durable matte finish resists cracking and chipping
• Will not produce offensive odors when heated in normal use
• Can be applied in layers for higher thermal or acoustic performance

Who is this for: Enthusiasts, installers, and professional shops who need a sprayable sound deadener for awkward or contoured areas where sheet materials won’t fit. It’s ideal for anyone upgrading vehicle acoustics—especially where fast drying, paintability, heat resistance, and adhesion to non-coated surfaces are important.