3M Rubberized Undercoating Spray — 6×16 oz Cans, Professional Corrosion Protection & Noise Dampening

3M 3584 Professional Grade Rubberized Undercoating is a spray-on, rubberized protective coating in a six-pack of 16 oz cans designed to shield vehicle undercarriages from corrosion and reduce road noise.

This professional-grade aerosol undercoating is formulated to form a flexible, moisture-resistant barrier on metal components beneath cars, trucks, and RVs. Its rubberized finish helps prevent water, salt, and grime from reaching bare metal while also absorbing vibration for quieter operation. Supplied as a pack of six 16-ounce cans, the product gives technicians and home mechanics enough material for several full-vehicle applications or targeted spot repairs.

How does this undercoating protect metal from corrosion?

The rubberized film bonds to metal surfaces and creates a continuous, water-shedding layer that keeps moisture and corrosive salts away from vulnerable areas. Because the coating remains flexible, it resists cracking when exposed to road impacts and thermal cycling, maintaining long-term coverage.

• Creates a seamless barrier against moisture and salt
• Flexible rubberized finish prevents flaking and cracking
• Adheres to bars, frames, floor pans, and welded seams
• Spray format allows even application to irregular shapes

Will this reduce road noise and vibration?

Yes — the rubbery composition dampens vibration and helps absorb sound generated by tires and the road surface. Applied to the underbody, wheel wells, and suspension components, the coating lessens resonance and rattles, contributing to a quieter cabin experience.

• Dampens vibrations from chassis and panels
• Reduces rattles around seams and fasteners
• Effective in wheel wells and inner fenders
• Compatible with existing sound-deadening layers

How easy is it to apply and how much coverage will six cans provide?

Application is straightforward: spray evenly from the recommended distance after cleaning and degreasing surfaces. The aerosol delivers a controllable spray pattern that minimizes runs and overspray; drying times depend on temperature and film thickness. Six 16 oz cans typically cover multiple touch-up areas or an entire compact vehicle when applied in moderate thickness, and provide additional material for larger trucks or repeat coats.

• Aerosol spray for controlled, even coating
• Simple surface prep: clean, dry, and mask adjacent areas
• Six cans give enough volume for multiple applications
• Apply in thin, overlapping passes for best adhesion

Is this product suitable for professional shops and DIYers?

The 3M 3584 formula is formulated to meet the expectations of both professional technicians and experienced DIYers. Its performance, packaging size, and ease of use make it well suited for restoration projects, preventive maintenance, and fleet service where consistent results and durability matter.

• Professional-grade formulation for reliable results
• Packaged quantity supports shop-level workloads
• User-friendly aerosol system for at-home use
• Works on a wide range of vehicle types and components

Who is this for: The 3M 3584 six-pack is ideal for mechanics, restoration shops, fleet maintenance teams, and knowledgeable DIYers who want a durable, flexible underbody coating that both protects against corrosion and reduces road noise. Choose this pack when you need enough product to cover several vehicles or to complete larger projects without repeated reordering.