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

$4.50
$10.99
+46 Deal Score
48,676 Views
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

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  • 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
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Original Post

Written by
Edited January 15, 2022 at 07:52 PM by
About this item
  • 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

https://smile.amazon.com/gp/produ...49AS/?th=1
in Auto Parts & Supplies (3)
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$4.50
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Featured Comments

I've heard from rust belt mechanics that it causes more harm than good
I use this with great success for waterproofing outdoor low voltage landscape wiring connections.
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.

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Our community has rated this post as helpful. If you agree, why not thank ?
#3
I've heard from rust belt mechanics that it causes more harm than good
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#4
Quote :
Quote from JonnyAbs :
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.
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Last edited by CheapestDealz January 14, 2022 at 10:23 PM.
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#5
if this crap has a valid application I haven't found it yet. multiple cans available if you pay shipping...
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#6
Quote from CheapestDealz :
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.
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#7
I use this with great success for waterproofing outdoor low voltage landscape wiring connections.
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#8
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.
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#9
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.
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#10
If you are serious, use something with rust inhibitors in it:
https://www.amazon.com/Automotive...215&sr=8-2
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#11
Quote from CheapestDealz :
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
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#12
Quote from Mark42mc :
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.
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#13
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.
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#14
What's with the terrible shipping dates? Feb 23rd!
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#15
Quote from Bigbanks :
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!
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