Compare in 24 secondsHard finish.
Hard finish.
Soft protection.
See how the Thixo-Coat and Under Gone systems differ, then choose the kit that fits your project.
Compare the kits ↓Vehicle frames · Undercarriages · TrailersTreat the rust.
Treat the rust.
Choose your finish.
Keep salt off.
A hard, durable coating or a soft, creeping undercoating? Find the right system for your vehicle—and the right kit to apply it.
Rust treatment, protective coatings, and winter salt removal—all from Salts Gone®.
Made in the USAFree contiguous U.S. shippingRetail kits & practical sizesReal application demonstrations
Start with the finish you want
Hard coat or soft coat?
Choose the finish below, then compare the kits. Watch a quick overview if you’re still deciding.
Hard finish · Thixo-Coat
I want a painted finish.
A hard-curing, black semi-gloss coating that retains flexibility.
- Choose it for: exposed frames, trailers, equipment, and metal where you want a finished painted surface.
- Kit options: Paint Starter Kit or the complete $299 kit with zinc and Salts Gone prep.
Watch the Thixo-Coat overview
Soft finish · Under Gone
I want a soft undercoating.
A rust-converting calcium-sulfonate barrier that stays soft and self-healing.
- Choose it for: underbodies, seams, boxed frames, and corrosion-prone areas where a soft coating makes sense.
- Kit options: Under Gone Starter Kit or the complete $299 kit with more coating and Salts Gone prep.
Watch the Under Gone overview
Choose your setup
Four kits. Find your fit.
Start with a spray setup, or choose a $299 kit with Salts Gone prep wash and more coating. All four include a spray gun.
Spray-gun application requires a suitable compressed-air supply. Coverage varies with vehicle size, preparation, film thickness, and overspray. Check the product directions before starting.
Showing all four kits.
Watch: how flexible is Thixo-Coat?
See the coating bend in this 45-second demonstration.
Ready-to-spray convenienceTwist it on.
Twist it on.
Spray. Swap.
Our 32 oz Ready-to-Spray bottles thread directly onto the paint/undercoating gun. No separate cup to fill. Available for Rusts Gone, Thixo-Coat, and Under Gone.
Find your spray kit →Spray-gun application requires a suitable compressed-air supply.
See the bottle-to-gun connection in 22 seconds.
Have equipment? Need a refill?
Buy just what you need.
Build your own setup or top up an existing one. Choose the rust treatment, coating, and refill sizes your project needs.
Rusts Gone
Convert firmly adhered surface rust into a more stable, paintable surface before applying your coating.
Choose size & view directions →
Thixo-Coat
A hard-curing, semi-gloss black protective coating for frames, trailers, equipment, and other metal projects.
Choose size & view directions →Your winter routine still mattersCoated your frame?
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Coated your frame?
Keep washing the salt off.
Coating is one part of the plan. Salt and brine still build up on exposed surfaces, on top of the coating, and in areas you couldn’t fully reach. Keep Salts Gone in your winter wash routine.
Remove salt from exposed surfaces.
Wash away road-salt and brine buildup from the vehicle and underbody instead of letting it accumulate between storms.
Pay attention to the places you missed.
Frame pockets, seams, crossmembers, and tight areas can be difficult to coat completely. Use a suitable sprayer or chassis-flush setup to help reach accessible areas.
Inspect the protection you applied.
Check high-wear areas and touch up as needed. Allow new coatings to dry or cure as directed before washing; avoid aggressive spray that could disturb a soft film.
Prep before. Wash after.
Salts Gone®
Keep salt removal in the routine before coating and throughout the season.
Shop Salts Gone →A simple winter plan: inspect your coating, remove accumulated salt regularly, and wash after heavy salt exposure when conditions allow.
Watch: reaching inside the chassis
Before you start
A few common questions.
Do I have to remove my vehicle’s frame?
No. The frame-off demonstration makes the process easier to see. You can work on accessible areas of an assembled vehicle, using safe access and the right application equipment.
Can I coat directly over loose or flaking rust?
Remove loose, flaking scale first and clean away salt and other contamination. The hard-coat route uses Rusts Gone on remaining firmly adhered rust before Thixo-Coat. Under Gone includes rust-converting chemistry in its soft-undercoating system. Neither product repairs structural damage or replaces missing metal.
Which kit should I choose if I already own a spray gun?
You can buy individual products and practical refill sizes. Choose Thixo-Coat for a hard painted finish or Under Gone for soft protection, and add Rusts Gone and Salts Gone as needed for your preparation process.
Does one kit cover an entire vehicle?
The $299 kits are intended for a typical passenger vehicle or pickup project. Actual material requirements depend on surface area, condition, application thickness, overspray, and how extensively you coat cavities and components. Larger or more extensive projects may need extra product.
Why use Salts Gone if I’ve already applied a coating?
Salt can collect on exposed surfaces and in areas a coating did not reach. Continue regular Salts Gone washes to remove salt buildup, inspect your coating, and touch up wear. Follow the coating’s drying and curing instructions before the first wash.
Where can I find the full directions and data sheets?
Open the relevant product page for application details, and visit our product data sheets and safety data sheets before starting your project.
Your vehicle. Your protection plan.
Ready to pick your system?
Choose your finish, choose your kit, and keep salt removal in the routine.
Hard coat or soft coat?
Find your setup.Compare kits ↓
Find your setup.Compare kits ↓