---
product_id: 623387319
title: "Cosmoline RP-342 \"Heavy\" Rust Preventative Spray (Military-Grade) 9-Cans"
brand: "rp military-grade rust preventatives"
price: "AR$291117"
currency: ARS
in_stock: true
reviews_count: 11
url: https://www.desertcart.com.ar/products/623387319-cosmoline-rp-342-heavy-rust-preventative-spray-military-grade-9
store_origin: AR
region: Argentina
---

# Fast-drying in 25 mins Weather-resistant durability Military-grade protection Cosmoline RP-342 "Heavy" Rust Preventative Spray (Military-Grade) 9-Cans

**Brand:** rp military-grade rust preventatives
**Price:** AR$291117
**Availability:** ✅ In Stock

## Summary

> 🛠️ Shield Your Assets with Cosmoline RP-342!

## Quick Answers

- **What is this?** Cosmoline RP-342 "Heavy" Rust Preventative Spray (Military-Grade) 9-Cans by rp military-grade rust preventatives
- **How much does it cost?** AR$291117 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/623387319-cosmoline-rp-342-heavy-rust-preventative-spray-military-grade-9)

## Best For

- rp military-grade rust preventatives enthusiasts

## Why This Product

- Trusted rp military-grade rust preventatives brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rapid Application:** Dries in approximately 25 minutes—get back to work faster!
- • **Unmatched Longevity:** Protects metal surfaces for years with just one coat!
- • **Versatile Use Cases:** Perfect for vehicle undercoating and countless other applications.
- • **Trusted by Professionals:** Used by the U.S. Armed Forces and industry leaders since WWII.
- • **Extreme Environment Resilience:** Withstands salt spray, extreme temperatures, and harsh conditions.

## Overview

Cosmoline RP-342 is a military-grade rust preventative spray designed to provide long-lasting protection for metal surfaces. With a fast-drying formula that creates a durable, non-tacky coating, it is trusted by professionals and DIY enthusiasts alike. Ideal for various applications, including vehicle undercoating, this product ensures your equipment remains safeguarded against the elements for years.

## Description

Military-Grade Rust PreventionModeled after Military Specifications: MIL-PRF-16173, Grade 4 and MIL-C-83933.Application:IMPORTANT #1: Make sure your surface is clean and dry (not oily or greasy) to ensure best possible adhesion.IMPORTANT #2: RP-342 is a heavily-concentrated rust preventive. For best results, each spray can should be shaken vigorously for about 2 minutes to ensure a uniform coat. The aerosol cans should also be shaken intermittently during longer application sessions.GENERAL INSTRUCTIONS - Spray a generous, even coating on your surface and let dry. While a single coating will provide exceptional protection, additional coats can be applied if desired. If applying multiple coats, always let previous coats dry completely before applying the next coat. Ideally, it’s always preferable and recommended to apply over a non-rusted surface, however, RP-342 can be applied over moderate surface rust. RP-342 will prevent surface rust from spreading. RP-342 should not be applied over flaking or pitted rust…..these advanced types of rust should be treated prior to applying RP-342. The typical first application dry film thickness is 2.0 Mils (51 Microns).Common Applications Include (but are not limited to):- Vehicle undercarriage / undercoating (cars, buses, trucks, etc.) - the most popular application!- Parts & equipment storage- Overseas transportation- Heavy machinery & equipment (storage & in-use applications)- Packaging- Dies, molds, lathes, shafts and beams- Offshore drilling equipment, platforms & infrastructure- Farm implements- Boat shafts and propellers- Marine fittings- Rifle & other firearms preservation / storage- Garden tools & lawn mower blades- 1,000s of applications! Reliably protects any surface that might rust on you!

## Features

- OUR STRONGEST, LONGEST-LASTING & FASTEST-DRYING Rust Preventive Aerosol, PERIOD! 1-coat can reliably protect any metal, steel, or iron surface (parts, equipment, tools, machinery, etc.) for Years!.....indoors or outdoors.
- DURABLE & TOUGH – Will not crack, craze, blister, run or “wash off”. RP-342 produces a dry-to-the-touch (non-tacky), amber, translucent (see-through) petroleum wax coating that stands up to long-term salt spray, extreme temperatures and other harsh environments.
- EASY-TO-APPLY: Just spray onto a dry surface, dries in about 25 minutes; You’re Done!
- TRUSTED SINCE WWII – has been widely used & trusted by the U.S. Armed Forces, government agencies, commercial companies, and DIYers/consumers for generations.
- 1,000s of APPLICATIONS across commercial and private industries. Vehicle undercoating is one of the most popular applications. Easily stands up to road salt, chemicals, road debris and won’t wash off like many other undercoating products. One application/coating can protect for years.

## Images

![Cosmoline RP-342 "Heavy" Rust Preventative Spray (Military-Grade) 9-Cans - Image 1](https://m.media-amazon.com/images/I/51f16H1jroL.jpg)
![Cosmoline RP-342 "Heavy" Rust Preventative Spray (Military-Grade) 9-Cans - Image 2](https://m.media-amazon.com/images/I/81N+IOwjdFL.jpg)
![Cosmoline RP-342 "Heavy" Rust Preventative Spray (Military-Grade) 9-Cans - Image 3](https://m.media-amazon.com/images/I/41AellAtRYL.jpg)
![Cosmoline RP-342 "Heavy" Rust Preventative Spray (Military-Grade) 9-Cans - Image 4](https://m.media-amazon.com/images/I/71DhgsOzXSL.jpg)
![Cosmoline RP-342 "Heavy" Rust Preventative Spray (Military-Grade) 9-Cans - Image 5](https://m.media-amazon.com/images/I/815FX31EOfL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    This stuff is amazing!
  

*by T***W on Reviewed in the United States on August 21, 2023*

I've tried numerous brands that say they do the same, but nothing compares to this stuff. I had an issue of surface rust appearing on my paper cutter bed. I've many different products to stop the rust,....some did but left a bad finish as I need it to be smooth. This stuff, right out of the can, did the trick. Haven't seen any surface rust appear and the finish is nice and smooth. It's been 2 1/2 weeks since application and it's still going strong. This is my goto from now on. I have a few other things I'll be trying it on as well.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Amazing Rust inhibitor
  

*by D***E on Reviewed in the United States on March 22, 2024*

If it works oil, rigs, I’m sure I’ll work on a car

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Excellent product and simple application
  

*by C***S on Reviewed in the United States on August 17, 2022*

Cosmoline has a history of protecting metal in tough conditions. I applied to the frame of my GMC Sierra 1 ton and enclosed trailers. Simply clean (day before) and then apply. It has an odor for about 2 day, but that is now gone. Really fantastic product with many uses protecting against salt, etc. that normally eats up new vehicles and equipment

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-03-01*