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Pro-grade auto-body supply · Any quantity · 13,000+ SKUs in stock
13,000+ pro-grade SKUs in stock
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SEM

SEM Rust Shield 39573 Rust Preventer Cavity Wax, 24 oz Aerosol Can, Semi-Transparent Black

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$36.73
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30-day returns
Overview

Built for the job.

Rust preventer cavity wax is a semi-transparent black internal panel compound to restore OEM corrosion protection on inner body panels and cavities.

Why Pros Choose SEM

  • OEM recommended
  • Non-hardening
  • Sprayable in 360 deg pattern with 71120 aero wand
  • Superior adhesion
  • Excellent corrosion protection
  • Fast drying

How to Use

Inner Body Panels, Cavities and Channels

Specifications

Technical specifications for Rust Shield™ 39573 Rust Preventer Cavity Wax, 24 oz Aerosol Can, Semi-Transparent Black
Part No. 39573
Product Line SEM
MFR Model 39573
Standard/Approvals California Pro65 Warning: This product contains the following chemical(s) known to the State of California to cause birth defects or other reproductive harm.This product contains the following chemical(s) known to the State of California to cause
Application Inner Body Panels, Cavities and Channels
Manufacturer SEM
UPC 646786395734
Brand Rust Shield™
Maximum Sale Quantity 6
Maximum Sale Day 7
Rubberized No
Color Semi-Transparent Black
Container Size (oz) 24
Container Type Aerosol Can

About SEM

SEM Products specializes in paint adhesion systems, flexible coatings, and plastic repair — the go-to choice for interior and trim refinishing.

Frequently Asked Questions

What size does SEM come in?

This listing ships SEM in a 24 (CN) container. Check the autofxmart catalog for other sizes and bulk pricing.

How fast does autofxmart ship SEM?

Most in-stock orders for SEM ship the same or next business day from our US warehouse. Expedited options are available at checkout. Freight-class items may require an additional 1–2 days for carrier pickup.

Is this SEM product genuine?

Yes. autofxmart is an authorized distributor of SEM products. Every unit is factory-fresh, sealed, and backed by the manufacturer's standard warranty. If you have a concern, contact support@autofxmart.com and we will make it right.

What is the manufacturer part number (MPN) for SEM?

The MPN for SEM is 39573. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.

Documents & Safety

Why Buy from autofxmart

  • Authorized distributor — authentic, factory-fresh stock.
  • Fast US shipping — most orders ship within 1 business day.
  • 30-day returns — buy with confidence.
  • Pro-shop pricing — bulk discounts available on request.
  • Expert support — questions? Email us at support@autofxmart.com.
How to apply

Steps

1Clean and degrease the surface, then scuff as needed.
2Mask off surrounding panels and trim.
3Mix to the product's ratio and strain.
4Apply 2–3 even coats, flashing between each.
5Let cure fully before sanding, buffing, or assembly.
Specifications

Full data

BrandSEM
Part #39573
UPC646786395734
ApplicationInner Body Panels, Cavities and Channels
Size24
ColorSemi-Transparent Black
OriginUS
ConditionNew
RubberizedNo
Frequently asked

Good to know

This listing ships SEM in a 24 (CN) container. Check the autofxmart catalog for other sizes and bulk pricing.
Most in-stock orders for SEM ship the same or next business day from our US warehouse. Expedited options are available at checkout. Freight-class items may require an additional 1–2 days for carrier pickup.
Yes. autofxmart is an authorized distributor of SEM products. Every unit is factory-fresh, sealed, and backed by the manufacturer's standard warranty. If you have a concern, contact support@autofxmart.com and we will make it right.
The MPN for SEM is 39573. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.

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