---
product_id: 678325501
title: "MSNOR Cosmoline RP-342 Heavy Rust Preventative Spray (Military-Grade) 1-Can"
brand: "rp military-grade rust preventatives"
price: "S$58"
currency: SGD
in_stock: true
reviews_count: 10
url: https://www.desertcart.sg/products/678325501-msnor-cosmoline-rp-342-heavy-rust-preventative-spray-military-grade
store_origin: SG
region: Singapore
---

# Dries in 25 mins Withstands harsh weather Military-grade protection MSNOR Cosmoline RP-342 Heavy Rust Preventative Spray (Military-Grade) 1-Can

**Brand:** rp military-grade rust preventatives
**Price:** S$58
**Availability:** ✅ In Stock

## Summary

> 🛠️ Protect Your Gear Like a Pro!

## Quick Answers

- **What is this?** MSNOR Cosmoline RP-342 Heavy Rust Preventative Spray (Military-Grade) 1-Can by rp military-grade rust preventatives
- **How much does it cost?** S$58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/678325501-msnor-cosmoline-rp-342-heavy-rust-preventative-spray-military-grade)

## 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

- • **Trusted Legacy:** Used by the U.S. Armed Forces since WWII.
- • **Rapid Application:** Spray and forget—dries in just 25 minutes!
- • **Long-Lasting Shield:** One coat can protect for years against salt and chemicals.
- • **Unmatched Durability:** Engineered to resist cracking, blistering, and washing off.
- • **Versatile Protection:** Ideal for metal, steel, and iron surfaces.

## 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

![MSNOR Cosmoline RP-342 Heavy Rust Preventative Spray (Military-Grade) 1-Can - Image 1](https://m.media-amazon.com/images/I/418TBF2U1VL.jpg)
![MSNOR Cosmoline RP-342 Heavy Rust Preventative Spray (Military-Grade) 1-Can - Image 2](https://m.media-amazon.com/images/I/81N+IOwjdFL.jpg)
![MSNOR Cosmoline RP-342 Heavy Rust Preventative Spray (Military-Grade) 1-Can - Image 3](https://m.media-amazon.com/images/I/41AellAtRYL.jpg)
![MSNOR Cosmoline RP-342 Heavy Rust Preventative Spray (Military-Grade) 1-Can - Image 4](https://m.media-amazon.com/images/I/71DhgsOzXSL.jpg)
![MSNOR Cosmoline RP-342 Heavy Rust Preventative Spray (Military-Grade) 1-Can - Image 5](https://m.media-amazon.com/images/I/815FX31EOfL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    I don't even have to review it
  

*by A***X on Reviewed in the United States on October 16, 2024*

It's the best of the best. Plain and simple.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    easy to apply coats well dries fast
  

*by A***R on Reviewed in the United States on August 28, 2024*

I use this a a protective coating under my vehicles for winter, coats well, easy to apply, has "straw" to spray into small areas.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    excellent product military proven
  

*by M***M on Reviewed in the United States on May 5, 2024*

This is the same thing the GM truck uses on the frame at the time of new assembly as their frame is in raw steel state and dipped in this same product and compatible with their factory rust proofing plus its what the military uses to protect a lot of equipment from corrosion. It does have to be maintained on the vehicle as road debris and scrapes can remove it. Gm warranty requires re-touch up of this factory scaled off material on the factory frame to be done by GM service personnel under their warranty service and they are responsible and required by GM for them to do this mandatorily when discovered under their warranty provisions, but you have to make sure they do it..Easy to use for protection of firearms storage and GM or other makes touch ups on frames and inner body panels  to prevent the start of corrosion. It is one of the only products compatible with the factory coating in terms of it won't break the factory coating down like a oil based protector or undercoating like fluid film would..Also stays where it is and does not run. Clear or black.

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-01-23*