AUTOMOTIVE
An easy-to-apply underbody rust treatment designed to protect vehicles, trailers, and equipment from salt, mud, and corrosion.
Goldseal Automotive is a spray-ready, oil-based corrosion barrier designed to protect vehicle underbodies, trailers, machinery, and outdoor equipment from rust, salt, mud, and chemical exposure. Based on our proven industrial Goldseal chemistry, this smooth, easy-spray liquid delivers long-lasting, flexible protection for vehicles exposed to harsh environments.
Whether applied by workshops, detailers, or DIY users, Goldseal Automotive forms a durable, self-sealing coating that won’t crack, peel, or trap moisture like paint-based underseals do.
Why Goldseal Automotive works
Spray-ready and easy to apply
Goldseal Automotive is ready to spray right from the tin. It contains a controlled level of carrier fluid, giving it a smooth texture that atomises cleanly through underbody guns and cavity spray wands. It flows into seams, folds, spot welds, and crevices—areas where rust always begins.
Applied soft and dries pliable
Goldseal Automotive allows users to achieve high coverage with minimal effort, and can be recoated at any time without stripping.
Once applied, lighter components evaporate naturally, leaving behind a malleable, tacky protective film that:
displaces moisture and stops existing rust
builds protective film thickness easily
resists wash-off
excludes moisture and air
does not crack or peel
Self-sealing and flexible
Vehicle underbodies vibrate, twist, and take constant impact. Goldseal Automotive absorbs movement instead of resisting it. The coating:
remains flexible for years
self-seals scratches
tolerates rock impacts and chassis flex
Goldseal Automotive is perfect for:
4WDs, beach vehicles, and touring rigs
utes, farm trucks, trailers, and caravans
machinery and equipment stored outdoors
tiny home chassis and light commercial vehicles
marine-adjacent vehicles and boat-launch tow vehicles
off-road or industrial vehicles exposed to fertiliser, salt, or chemicals
Note: Custom viscosity adjustments are available upon request.
Non-DG Protection with no classified hazard risks. Designed for safe handling and transport
A simple four-step application process
Step 1 : Clean or degrease the underbody
Step 2 : Remove loose scale
Step 3: Spray an even coat
Step 4: Allow the film to firm up over the next hours/days
In cool conditions the product may thicken. If required, gently warm the container to improve flow and sprayability.
Do not overheat or apply direct flame. For more detailed application instructions, refer to our Technical Data Sheet