Item # 23090Z BRAND: POR-15

POR15 Rubberized Under Coating Aerosol

Metal Protective Coating
Metal Protective Coating
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POR15 Rubberized Under Coating Aerosol

Product Overview:


POR-15 Rubberized Under Coating is a flexible, paintable, textured black coating. It is the only undercoating with POR-15 Rust Preventive technology and will protect against moisture, salt, chemicals, dust, heat, and cold. It's an excellent moisture barrier for application over auto body repairs and creates an effective sound barrier that reduces vibration and deadens sound in wheel wells, quarter panels, fenders and under carriages. Provides superior adhesion to both painted and unpainted surfaces. POR-15 Rubberized Under Coating has superior resistance to road salt and will resist chipping and abrasions. May be used to insulate against engine and muffler noise, protects against dust penetration, and exhaust fumes.

POR-15 Rubberized Under Coating can be applied directly over POR-15 Rust Preventive Coating for the toughest rust, corrosion and moisture barrier possible along with excellent sound and vibration deadening.


Tough, Heavy Duty Rubber Barrier. Protects Against Salt and Chemicals. Sound Barrier and Vibration Reducer. Sticks to Curred POR-15 Rust Preventitive Coating and POR-15 Topcoat. Paintable. Professional Use.

Shipping & Handling

Ships via UPS

In the Box

Guides & Accessories


Please read all provided instructions prior to use.

Safety Information

Always wear proper personal safety equipment when using this product. Always use in a well ventilated area.

Aerosol Details

Net Weight 22oz


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Questions & Answers

How much surface area can a can cover…..can. 

Asked by: Kingsly
One can covers roughly 6 sq. ft.
Answered by: Kelly H
Date published: 2023-02-01

Is this product UV resistant or does it "gray over time like POR 15 paint?

Asked by: Juan C
This product is not fully UV stable
Answered by: SeanW
Date published: 2021-06-08

Is this product breathable so if water gets behind it it won’t rust out your vehicle?  Also could I apply directly to a factory painted wheel well?

Asked by: Derrick252
We have not specifics on weather this product is breathable or not? you may want to contact Por-15 @ 1-800-457-6715 for details.
Answered by: vince
Date published: 2021-05-30

Does this have a texture similar to bed liner?

Asked by: MickeyP
Yes, similar to bed liner but does not dry to a hard surface. This product is a non-hardening flexible product.
Answered by: vince
Date published: 2021-04-27

Will this work over rust encapsulator

Asked by: Jake127
We recommend using the rust encapsulator under rubberized undercoating. Or you could use just the rubberized undercoating on direct bare clean metal.
Answered by: Sonya
Date published: 2021-09-12

Will this adhere to wood?

Asked by: nonick
This product is designed for application on metal.
Answered by: ZachC
Date published: 2020-10-08

Will this adhere to the underside of the fiberglass fenders on my Baja Bug?

Asked by: Mark22
Yes, this product can certainly be applied to properly prepped fiberglass surfaces without any issues.
Answered by: Kelly H
Date published: 2020-10-08

Does it come in silver?  Thanks 

Asked by: Jimc
This product is not available in silver.
Answered by: SeanW
Date published: 2020-10-08
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POR15 Rubberized Under Coating Aerosol
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