Underneath view of a car's suspension and drivetrain components, including control arms, shock absorbers, and a differential.

Protective Coatings

Every protective coating we offer begins with meticulous preparation. Before any product is applied, the vehicle undergoes a thorough dry ice cleaning to remove any contaminates without damaging surfaces. We carefully mask and prep the body, cover any exposed wiring, connectors, brake and exhaust components, and remove the underside mounted spare tire (if equipped) to ensure complete access and protection. Our process is precise, controlled, and documented with extensive before-and-after photos— so you can see what was done and why it matters.

New Vehicle Coatings

Designed for new, clean, or restored vehicles to prevent corrosion before it ever begins.

Rust Treatment and Correction

Engineered to neutralize existing corrosion and create a long term protective barrier.

Black Dye- Infused Exterior Trim Coating

Developed to restore, rejuvenate, and protect exterior plastic and rubber surfaces

4941- Black

Before Dry Ice 

Examine, Mask, and Prepare vehicle for dry ice cleaning

After Dry Ice

Dry Ice Clean undercarriage and suspension components; removal of previously installed undercoating. Mask fuel and brake lines.

After Coating Application 

Application of Dinitrol ML in frame rails and cavities. Once dried, install Dinitrol 4941 (black) on entire undercarriage and suspension components.

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  • Dinitrol 4941 is a bitumen-based underbody coating used for full or partial underbody applications. 4941 is a long-term protective product that leaves a firm, black film with short drying time and good adhesion and flexibility on all metal surfaces, rubber and plastic parts. This coating will remain pliable in heat, cold, and moisture.

  • There is no "wrong" coating; the best choice ultimately comes down to your vehicle and your personal preference.

    We typically recommend 4941 for older, previously used, or rust-prone vehicles, as well as those used off-road or in demanding conditions. Its thicker, bitumen-based formula remains pliable and has self healing properties, making it well suited to rougher surfaces and conditions. It also has more of a textured finish.

    In comparison, Dinitrol 958 is a water based coating that dries to a smoother, more uniform finish.

  • Preexisting surface rust is first addressed through a thorough dry ice cleaning process to leave the metal as clean and properly prepared as possible.

    Once the surface has been cleaned, Dinitrol ML, a penetrating cavity wax, is applied directly over areas of existing rust. We also apply ML inside frame rails, seams, and other internal cavities where moisture and corrosion can develop out of sight. Its penetrating properties allow it to reach areas that conventional coatings cannot, helping to mitigate and control further corrosion.

    After the Dinitrol ML treatment has been completed, we apply Dinitrol 4941 over the treated surfaces. This creates a durable protective barrier designed to seal and protect the underlying metal from moisture, road contaminants, and environmental exposure. 

    The result is a multi-stage corrosion protection system: thoroughly clean the substrate, penetrate and treat existing corrosion, then seal and protect the surface for long term preservation. 

    • Durable Bitumen-Resin Protective Layer: Forms a tough, black, OEM-style finish that resists stone impacts, salt, gravel, and road debris.

    • Long-Term Corrosion Defense: Maintains elasticity, preventing cracking even in harsh winter climates.

    • High Abrasion Resistance: Protects against physical wear from road spray and debris.

    • Sound Damping: Reduces road noise and vibration coming through the chassis.

4010- Clear

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  • Dinitrol 4010 is a high temp rated, transparent, wax-based corrosion protection coating designed to protect exposed metal surfaces from moisture, salt, and environmental contamination. Once applied, it cures to a tack-free, hard wax film that preserves the appearance of newer vehicles while delivering long-term protection.

  • There is no "wrong" coating- the best choice depends on your vehicle and preferences.

    Dinitrol 4010 is a wax based coating rated for temperatures up to 392°F. Because it dries clear, we typically recommend it for newer, rust-free, or well-preserved vehicles, as well as areas where maintaining the vehicle's appearance is especially important. 

    4010 provides the same level of protection as the other Dinitrol coatings and becomes highly hydrophobic once dry, making it easy to clean and rinse. 

    We particularly like using Dinitrol 4010 on vehicle underbodies, while we coat the frame in black (using either Dinitrol 4941 or Dinitrol 958). It can also be applied to exhaust components from the catalytic converter back. However, because of the consistent high temperatures in these areas, the coating may gradually turn beige or brown over time. 

    • Transparent finish helps maintain the original underbody appearance

    • Ideal for new and well-maintained vehicles

    • Protects without a heavy black coated look

    • Cures to a dry, non-sticky film

    • Does not attract dust, dirt, or road debris

    • Clean, professional finish compared to oil-based coatings

    • Seals surfaces from moisture and salt intrusion

    • Helps prevent oxidation on exposed metals

958- Black

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  • Dinitrol 958 is a water-based stone chip protection product that forms an elastic, black film designed to protect against corrosion. 958 has a sleek, satin black appearance once dried.

  • There is no wrong choice; it ultimately comes down to personal preference and the look you want to achieve. 958 provides a sleek, uniform, satin-black finish, while 4941 has a more textured, heavy duty appearance.

    In our opinion, 958 is best suited for classic muscle cars, relatively clean frames and wheel wells without significant rust scaling, and applications where you're looking to closely match the OEM coatings commonly found underneath vintage European vehicles. 

  • Preexisting surface rust is first addressed through a thorough dry ice cleaning process to leave the metal as clean and properly prepared as possible.

    Once the surface has been cleaned, Dinitrol 977, a base adhesion layer and corrosion inhibitor, is applied directly over areas of existing rust. We also apply 977 inside frame rails, seams, and other internal cavities where moisture and corrosion can develop out of sight. Its penetrating properties allow it to reach areas that conventional coatings cannot, helping to mitigate and control further corrosion.

    After the Dinitrol 977 treatment has been completed, we apply Dinitrol 958 over the treated surfaces. This creates a durable protective barrier designed to seal and protect the underlying metal from moisture, road contaminants, and environmental exposure. 

    The result is a multi-stage corrosion protection system: thoroughly clean the substrate, penetrate and treat existing corrosion, then seal and protect the surface for long term preservation. 

    • Refined OEM-Style Finish: Clean, satin-black appearance preferred by enthusiasts, collectors, and customers wanting a premium look.

    • High Abrasion Resistance: Withstands impact from gravel, salt, road debris, and winter brine solutions.

    • Strong Chemical & Moisture Resistance: Protects steel and coated surfaces from saltwater, humidity, and environmental contaminants.

    • Long-Term Flexibility: Unlike hard coatings, 958 retains elasticity, reducing the risk of cracking or flaking over time.

    • UV Stability on Exposed Areas: Helps maintain color and appearance where light exposure occurs.

    • Paintable: Can be easily overpainted with most commercially available automotive paints, allowing for straightforward further processing.

Industrial Underbody Ceramic Coating

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Black Dye-Infused Exterior Trim Ceramic Coating