DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan

Customer Services

About Us

Customer Support

Desert Online General Trading LLC

Dubai, United Arab Emirates

Cosmoline RP-342 Black Rust Preventive Spray (Military-Grade) 6-Cans

Cosmoline RP-342 Black Rust Preventive Spray (Military-Grade) 6-Cans

Q: Por15 my van frame, inner fenders, axles, etc now deciding if i need to shoot my chassis black paint & cosmo or if i can skip painting? uv protection?

As with everything, preparation is key. Paint alone does not cut it here in upstate New York (The Rust Belt). In my case, the entire underside of a ‘08 Tundra here’s what I did. A good up close and personal power washing. Then pump sprayed the correct mixture of Salt-Away, rinsed thoroughly and let dry. Did those steps a second time just because I’m ocd. Black Star where necessary, primer when ready and topcoat with black paint. Mask off entire exhaust, rotors, calipers, and anything that could be oversprayed,pull tail lights and fender liners. I used cosmoline rp-342 black, 15, 12oz rattle cans, shaken continuously and done on a nice day with no wind and 65 degrees. Does not need to be sprayed heavily and can be second coated. I used a can or 2 of the “Heavy” amber formulation when coating any of my painted areas, such as behind the cab and front of bed, under tailgate and vulnerable areas in the engine compartment. Definitely dress like your installing fiberglass insulation because this stuff stays “Anywhere it touches”, getting it off of your skin is not fun. All of that work has just been put through a pretty nasty winter here with salt getting encrusted everywhere and anywhere it could, with trips to the power washer when I could, to get it off. I know this isn’t a long test duration, but that cosmoline is holding its own and then some. I will never use anything else when I do another vehicle, worth every penny! This stuff is Mil-spec for a reason.

Q: Can this be applies over gas metal pipes?

yes but your pipes will be sticky forever

Q: Can this be applied over rust-oleum automotive rust reformer or vht rust converter?

Yes, RP-342 can be applied over any DRY surface (not oily or greasy) to ensure the best possible adhesion.

Q: Is Spray can compatible with wands for spraying inside rockers? cap male or female - tube on cap or tube on can?

Hello, unfortunately the cosmoline tip is a male. The wands spray top that I got from a different cavity wax company are female. If you’re handy enough, I’m sure it’d be possible to retrofit the cosmoline spray tip to accept the wands brass fitting. My thoughts on that would be to carefully drill the tip to just undersized of the brass and insert, followed by wrapping with hot glue. I know this is possible because I’ve had to hot glue the extension wands onto the spray tips to keep them from dislodging. Hope this helps!

Product ID: 219019337

Secure Transaction

Details

Brand
Cosmoline LLC
Color
Black
Finish Type
Gloss
Size
12 Ounce (Pack
Special Feature
Fast-Drying
Unit Count
72 Ounce

⏱️Dries in 25 minutes

🌡️Withstands extreme temps & salt spray

🛡️Protects metal for years

Frequently Bought Together

Cosmoline RP-342 Black Rust Preventive Spray (Military-Grade) 6-Cans

Cosmoline RP-342 Heavy Rust Preventative Spray (Military-Grade) 6-Cans

Rust-Oleum 248658-6PK Rust Reformer Spray, 10.25 oz, Black, 6 Pack

Description

🛡️ Spray once, protect forever—because your gear deserves military-grade armor!

FAST DRY FORMULA - Ready to handle your gear in just 25 minutes—no waiting around
MILITARY GRADE RUST DEFENSE - Trusted by U.S. Armed Forces since WWII for unmatched durability
VERSATILE INDUSTRIAL STRENGTH - Perfect for vehicles, machinery, firearms, marine gear, and more—1,000s of applications
INVISIBLE ARMOR FOR YOUR METAL - Non-tacky black wax finish conceals rust and resists cracking or washing off
ONE COAT LONG TERM PROTECTION - A single spray shields metal surfaces for years indoors or outdoors

Cosmoline RP-342 is a military-grade, fast-drying black rust preventive spray that delivers a durable, non-tacky petroleum wax coating. Engineered to protect metal, steel, and iron surfaces from rust for years, it withstands harsh environments including salt spray and extreme temperatures. Trusted by the U.S. Armed Forces since WWII, this aerosol spray offers one-coat protection ideal for vehicle undercoating, heavy machinery, firearms, and marine equipment.

Specifications

Brand	Cosmoline Direct, LLC
Color	Black
Finish Type	Gloss
Size	12 Ounce (Pack of 6)
Special Feature	Fast-Drying
Unit Count	72 Ounce
Paint Type	Spray
Specific Uses For Product	Vehicle Undercoating, Car Undercoat, Truck Undercoating, Rust Prevention, Rust Preventive
Surface Recommendation	Metal
Indoor/Outdoor Usage	Indoor, Outdoor
Item Form	Aerosol
Model Name	RP-342
Package Information	Can
Manufacturer	Flywheel Distribution, LLC
Item Weight	7 pounds
Product Dimensions	5.12 x 6.38 x 9.84 inches
Item model number	RP-342
Manufacturer Part Number	342-1032-6
Special Features	Fast-Drying

Have a Question? See What Others Asked

Por15 my van frame, inner fenders, axles, etc now deciding if i need to shoot my chassis black paint & cosmo or if i can skip painting? uv protection?

Can this be applies over gas metal pipes?

Can this be applied over rust-oleum automotive rust reformer or vht rust converter?

Is Spray can compatible with wands for spraying inside rockers? cap male or female - tube on cap or tube on can?

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 244.79

Duties & taxes incl.

Francestore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews