AUTOMOTIVE
An easy-to-apply underbody rust treatment designed to protect vehicles, trailers, and equipment from salt, mud, and corrosion.
Goldseal Automotive is a easy-spray, 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
Easy to spray and simple to apply
Goldseal Automotive is designed for easy spray application through underbody guns, cavity spray wands, and pressure pot systems. Depending on equipment setup and ambient temperature, light thinning may be required to achieve optimal atomisation and spray performance.
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 five-step application process
Clean or degrease the underbody
Remove loose scale
Lightly thin product approximately 20% (5:1) for pressure pot sprayability
Spray an even coat
Allow the film to firm up over the next hours/days
Goldseal Automotive may be lightly thinned where required to improve sprayability through pressure pot systems or specific spray equipment setups. A thinning ratio of approximately 20% (5:1) is typically recommended where additional atomisation or flow is desired.
Only compatible petroleum-based thinning agents should be used. Excessive thinning may reduce film build and overall protection performance.
For specialised application requirements, contact Goldseal Technical Support