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Whether you are restoring a classic vehicle, patching in a new floor section, or building from bare metal, the right thermal and acoustic protection makes all the difference. Design Engineering Inc. (DEI) has developed a complete line of products under the ATAC (Advanced Thermal Acoustic Coating) program to tackle noise, heat, and moisture from the inside out.
This step-by-step guide walks through how and when to use each of DEI’s ATAC products during a restoration or interior upgrade project, including primers, seam sealers, and coatings. These solutions are engineered to enhance comfort, protect your vehicle’s metal surfaces, and reduce road noise and heat transfer through the floor and firewall.
Step 1: Prime The Metal With DEI 50297 ATAC Red Oxide Primer
Before applying any sound or heat coatings, it is critical to seal any bare or cleaned metal. DEI 50297 ATAC Red Oxide Primer is a water-based acrylic latex primer formulated to seal and protect automotive steel surfaces during restoration. This primer is compatible with DEI's ATAC coatings and other latex-based topcoats.
It is not only corrosion resistant but also easy to apply and clean up with soap and water. The high-solids zinc formula creates a durable bond that enhances adhesion and stops rust from spreading. Whether you plan to coat the surface afterward or leave it as-is, this primer is a reliable first layer.
Key Benefits:
- Seals bare metal surfaces
- Stops rust and resists chemicals
- Works well as a base for thermal and acoustic coatings
- Environmentally friendly and non-hazardous
Step 2: Seal The Seams With DEI 50213 ATAC Urethane Seam Sealer
Once the floor panel is installed or repaired, you will need to seal the welded seams and joints to prevent moisture intrusion and help reduce unwanted vibration and sound. DEI 50213 ATAC Urethane Seam Sealer is the go-to solution for this step. It adheres to bare, primed, or painted surfaces and is compatible with multiple materials including steel, aluminum, and fiberglass.
Unlike some products that harden and crack over time, DEI’s seam sealer remains flexible and will not shrink or sag. It is paintable and ready in about one hour, making it a time-efficient option for restorers and custom builders.
Why It Matters:
- Prevents water entry that can lead to rust
- Blocks road noise and vibrations
- Easy to work with and long-lasting
- Paintable for a finished look
View DEI 50213 Seam Sealer at JEGS
Step 3: Apply DEI 50211 ATAC Coating For Heat And Sound Control
With your metal protected and seams sealed, it is time to lay down the core of DEI’s interior comfort system. You have two options depending on the size of the job.
For Small Repairs or Touch-Ups: DEI 50211 ATAC Spray-On Coating
DEI 50211 ATAC Spray-On Coating is an aerosol solution ideal for small panels, repairs, or hard-to-reach areas. It uses ceramic sphere technology to reflect heat and reduce vibration. The coating can handle up to 375°F and dampens sound transfer through the vehicle's interior panels.
Before applying, make sure the surface is clean and primed. The coating should be sprayed in even coats and allowed to cure for 24 hours before reassembly.
Features:
- Heat resistance up to 375°F
- Water-soluble and non-toxic
- Easy application from a 12 oz. spray can
- Great for touch-ups or small sections
View DEI 50211 Spray-On at JEGS
Step 4: DEI 50208 ATAC Thermal Coating (1 Gallon) For Full Coverage
For larger areas like complete floor pans, firewalls, or roof interiors, use DEI 50208 ATAC Thermal Coating in the one-gallon pail. This product can be brushed, rolled, or sprayed on to cover up to 75 square feet. It creates a 2-in-1 heat and sound barrier using ceramic microspheres that insulate against high temperatures and cancel out road noise.
Be sure to follow surface prep guidelines. Bare metal must be primed first and any paint should be scuffed before application. Apply a uniform coat 12 to 16 mils thick, allow 12 hours between coats, and let cure for 24 hours at 70°F before reinstalling carpet or applying heat.
Why It Works:
- Controls both sound and heat with one coating
- Covers more area with less material
- Easy cleanup with soap and water
- A smart solution for full interior restoration
View DEI 50208 Coating at JEGS
Enhance Comfort And Durability With DEI’s ATAC Line
Restoring a vehicle goes beyond bodywork and engine upgrades. Interior heat and sound control are critical for comfort, longevity, and driving enjoyment. The ATAC system from Design Engineering Inc. is a professional-grade solution trusted by restoration shops and DIY builders alike.
By using the right products in the correct order—starting with 50297 primer, sealing with 50213 seam sealer, and applying 50208 or 50211 thermal coatings—you can eliminate the hassle of retrofitting insulation later on.
Explore the full line of Design Engineering Inc. ATAC products available now at JEGS.com and make your next restoration project quieter, cooler, and built to last.
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