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Rustproofing and Undercoating System is rated 4.0 out of 5 by 5.
Rated 5 out of 5 by from Worked great. The gun and extensions worked very well. I like the adjustability of the gun. It was almost fun to do!
Date published: 2014-10-27
Rated 5 out of 5 by from Good Stuff I've used this on everything I didn't want to rust , installing a new gas tank ? coat it outside and the problem is solved , Installing a body panel ? coat it and the problem is solved , bought a new mower ? coat the underside of the deck and it won't rust but it will take touchup at the end of each season just use your head, If it rusts then coat it , I love it
Date published: 2012-08-19
Rated 3 out of 5 by from Good results but wasteful I puschased this gun excited to spray my truck but when I went to use it I was dissapointed that I could not directly attach the cans to the gun because of the length of the pick up tube. I modified my gun so I would have the mess and waste wen transfer material from the cans to the plastic jug
Date published: 2015-04-29
Rated 2 out of 5 by from It works I bought this to do my rockers and cab corners. product worked good but the gun stopped spraying 3/4 of the way through. Spent more time messing with the gun then it took to do the job. Not happy I did not get to finish the job.
Date published: 2015-10-27
Rated 5 out of 5 by from Eastwood comes up with another win Excellent product! Beats the texture quality and price of spray bombs hands down! A must have if your replacing any underbody components!
Date published: 2010-08-16
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will this gun spray the rust encapsulator ? an what types will it spray & dos it need to be reduced

Asked by: Lowell
Yes you can spray encapsualtor and other undercoating/rust treatment products with it. You would reduce 5-10% lacquer thinner for the encapsulator
Answered by: SeanA
Date published: 2014-12-02

How much of each product do I need for a crew cab full size truck?

Asked by: wardracing
2-3 Quarts of undercoating would be needed to do the truck.
Answered by: SeanA
Date published: 2014-11-14

what size compressor is needed for best results

Asked by: Blake
You will need a compressor that can supply 40-60 psi @ 5-6 cfm.
Answered by: NickC
Date published: 2014-10-01

Does the gun screw directly onto the anti-rust or rubberized undercoating?

Asked by: Alan1
Yes, both of those containers will attach directly to the bottom of the undercoating gun.
Answered by: MikeL
Date published: 2014-09-18
  • 2016-07-23T07:40CST
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Rustproofing and Undercoating System

Item #50369ZP Brand: Eastwood

Includes rubberized undercoating,
anti-rust, even the gun and wands


Complete Undercoat and Rust Prevention System won't let your classic rust Premium undercoating system comes with everything you need—including the gun and wands—to help you completely protect your vehicle, outside and inside.
  • Drill hole for access inside doors, sills, rocker panel (Unibit included)
  • Insert wand to spray (gun, 3 wands and 2 tips included)
  • Includes Rubberized Undercoating and Anti-Rust

More info...

About Rustproofing and Undercoating System

Don't let your classic rust. This Complete Rust Prevention Package This kit includes the Undercoating System (20441) with 2 wands and tips for undercoat and anti rust in recessed areas, the Unibit (16003B) allows access so the Undercoating Gun can treat door, and rocker panel areas where access holes don't exist, the Pk of 25 Plugs (16004) seals any drilled holes, 1 quart of HD AntiRust (16017ZP) coats internal surfaces while the 28 oz of Rubberized Undercoating (16008ZP) is used to coat wheel wells, frames and floor pans.


20441 Undercoating Gun (requires 40-60 psi @ 5-6 cfm) with 2 Flexible Wands
29836 16" Rigid Wand
16003B Unibit Drill Bit
16017ZP Quart of Heavy-Duty Anti-Rust
16008ZP Quart of Rubberized Undercoating
16004 Pack of 25 Plugs
16003A Plastic Bottle