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david3808 52.9K Views
Jan 12, 2022 6:05 PM

15-Ounce Rust-Oleum Rubberized Undercoating Spray (Black)

$4.50

$11

59% off
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Deal Details
Amazon has 15-Ounce Rust-Oleum Rubberized Undercoating Spray (Black) on sale for $4.47. Shipping is free w/ Prime or on $25+ orders.

Thanks to Community Member david3808 for posting this deal.

About this Product:
  • Perfect for use on bare or primed metal underbodies of cars, trucks, trailers, RVs and more
  • Professional-grade formula provides superior protection against corrosion and damage from water, salt and other chemicals
  • Dries to the touch in 1 hour and covers up to 10-15 sq. ft. per can
  • Undercoating helps deaden sound and reduce damage to parts
  • Features a wide, comfort spray tip and any-angle spray technology for easy painting even upside down

Editor's Notes

Written by SaltyOne | Staff
  • About this Deal:
    • Well Rated with 4.7 out of 5 stars from over 4,800 reviews.
    • At the time of this posting, Our research indicates that this is $2.50 lower (35.9% savings) than the next best available prices for like-products with prices starting from $6.97. -SaltyOne
  • About this Store:

Original Post

Written by david3808
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has 15-Ounce Rust-Oleum Rubberized Undercoating Spray (Black) on sale for $4.47. Shipping is free w/ Prime or on $25+ orders.

Thanks to Community Member david3808 for posting this deal.

About this Product:
  • Perfect for use on bare or primed metal underbodies of cars, trucks, trailers, RVs and more
  • Professional-grade formula provides superior protection against corrosion and damage from water, salt and other chemicals
  • Dries to the touch in 1 hour and covers up to 10-15 sq. ft. per can
  • Undercoating helps deaden sound and reduce damage to parts
  • Features a wide, comfort spray tip and any-angle spray technology for easy painting even upside down

Editor's Notes

Written by SaltyOne | Staff
  • About this Deal:
    • Well Rated with 4.7 out of 5 stars from over 4,800 reviews.
    • At the time of this posting, Our research indicates that this is $2.50 lower (35.9% savings) than the next best available prices for like-products with prices starting from $6.97. -SaltyOne
  • About this Store:

Original Post

Written by david3808

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+46
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43 Comments

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Jan 15, 2022 5:17 AM
528 Comments
Joined Mar 2018
JonnyAbsJan 15, 2022 5:17 AM
528 Comments

Our community has rated this post as helpful. If you agree, why not thank

I've heard from rust belt mechanics that it causes more harm than good
1
1
Jan 15, 2022 6:19 AM
349 Comments
Joined Feb 2011
CheapestDealzJan 15, 2022 6:19 AM
349 Comments
Quote :
Quote from JonnyAbs View quoted comment :
I've heard from rust belt mechanics that it causes more harm than good
JonnyAbsI've heard from rust belt mechanics that it causes more harm than good
Correct, it might trap moisture between the metal and the rubber which speed up the rusting. But this is a good deal. Buying 2 for DIY projects.
Last edited by CheapestDealz January 14, 2022 at 10:23 PM.
2
Jan 15, 2022 7:58 AM
427 Comments
Joined Jun 2015
gyrfalcon16Jan 15, 2022 7:58 AM
427 Comments
if this crap has a valid application I haven't found it yet. multiple cans available if you pay shipping...
2
8
Jan 15, 2022 12:19 PM
260 Comments
Joined Mar 2007
flassh81Jan 15, 2022 12:19 PM
260 Comments
Quote from CheapestDealz View quoted comment :
Correct, it might trap moisture between the metal and the rubber which speed up the rusting. But this is a good deal. Buying 2 for DIY projects.
Based on the og post, it seems priming the bare metal first before using this is how it achieves protection. I've never even heard of this stuff but wondering if mechanics are seeing it used as the only cost without a primer vs proper use.
Jan 15, 2022 1:14 PM
24 Comments
Joined Aug 2013
GrosseIleSquealJan 15, 2022 1:14 PM
24 Comments
I use this with great success for waterproofing outdoor low voltage landscape wiring connections.
Jan 15, 2022 2:00 PM
88 Comments
Joined Mar 2012
zoomeJan 15, 2022 2:00 PM
88 Comments
I would not use this under the body of your vehicle. If you're looking into some underbody rust prevention, I would suggest something like Fluid Film.
1
Jan 15, 2022 2:45 PM
2K Comments
Joined Jan 2008
BigbanksJan 15, 2022 2:45 PM
2K Comments
I use fluid film. I do not live in the rust belt. If you use this stuff, clean and prep the area first. Clean up rust, prime, hit with this.

If your car is new, no rust, putting this on would be okay.
1

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Jan 15, 2022 3:26 PM
490 Comments
Joined Jan 2008
dandiditJan 15, 2022 3:26 PM
490 Comments
If you are serious, use something with rust inhibitors in it:
https://www.amazon.com/Automotive...215&sr=8-2
Jan 15, 2022 3:54 PM
2.3K Comments
Joined Nov 2014
Mark42mcJan 15, 2022 3:54 PM
2.3K Comments
Quote from CheapestDealz View quoted comment :
Correct, it might trap moisture between the metal and the rubber which speed up the rusting. But this is a good deal. Buying 2 for DIY projects.
I heard the trick was to make sure you prime first then spray the rubber application to the other side and it won't cause any further issues if you just spray it without priming then you're trapping moisture or taking a chance to
Jan 15, 2022 4:28 PM
349 Comments
Joined Feb 2011
CheapestDealzJan 15, 2022 4:28 PM
349 Comments
Quote from Mark42mc View quoted comment :
I heard the trick was to make sure you prime first then spray the rubber application to the other side and it won't cause any further issues if you just spray it without priming then you're trapping moisture or taking a chance to
Thanks that makes more sense.
Jan 15, 2022 4:28 PM
205 Comments
Joined Mar 2010
FeetofleadJan 15, 2022 4:28 PM
205 Comments
This crap lasts about 2 months on a surface before it dries and flakes off. That is the same for any of the spray undercoatings. In order to get it to spray out of a nozzle, it is thin and aerated to the point where all you have is a porous coating. Its only use is to cover the rust on a car while you try to sell it. If it were free, I would not use it.
1
Jan 15, 2022 7:55 PM
1.3K Comments
Joined Aug 2014
Firstlast236Jan 15, 2022 7:55 PM
1.3K Comments
What's with the terrible shipping dates? Feb 23rd!
1
Jan 15, 2022 9:35 PM
354 Comments
Joined Jan 2015
theskater101388Jan 15, 2022 9:35 PM
354 Comments
Quote from Bigbanks View quoted comment :
I use fluid film. I do not live in the rust belt. If you use this stuff, clean and prep the area first. Clean up rust, prime, hit with this.

If your car is new, no rust, putting this on would be okay.
Got a gallon of this stuff just waiting for my new truck to come in to use it on. Read/seen a lot of great things about FF, can't wait to try it!
1
2
Jan 16, 2022 12:06 AM
88 Comments
Joined Nov 2020
RightnitroJan 16, 2022 12:06 AM
88 Comments
Quote from CheapestDealz View quoted comment :
Correct, it might trap moisture between the metal and the rubber which speed up the rusting. But this is a good deal. Buying 2 for DIY projects.
Please tell me you're joking. The first comment was a good joke. Your comment is plainly false. Any 'moisture' under this application, would not do anything being so miniscule.
6

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Jan 16, 2022 3:36 AM
1.4K Comments
Joined Apr 2015
dasein56Jan 16, 2022 3:36 AM
1.4K Comments
Any uses other than automotive?
1

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