Transtar Autobody Technology
Transtar Rubberized Undercoat 4373 20 oz Black Aerosol Can
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Overview
Built for the job.
Rubberized Undercoat is designed for use on new panel and fender replacements, section repairs, weld joints and rust holes as a sound deadener and rust preventative. Seals out dust fumes, heat and cold. For best results use at room temperature.
TRANSTAR® 4373 Extremely Flammable Rubberized Undercoat is a 20-oz aerosol formulation designed for rapid application of a durable black primer on automotive panels. The product sprays directly from the can, eliminating the need for mixing and providing consistent coverage on aluminum, galvanized steel, and standard steel substrates.
Key technical features include a shelf life of one year and a flash point of 96.4 °C (-141 °F), indicating high flammability that requires strict fire control during use. The aerosol delivers a uniform rubberized film that adheres well to metal surfaces, preparing them for subsequent coating layers.
Because the undercoat is classified with multiple GHS hazards-including acute toxicity, aspiration risk, and skin corrosion-operators must wear eye protection, chemical-resistant gloves, protective clothing, and a respirator. Adequate ventilation is essential, and any exposure should be treated according to the first-aid guidelines provided.
Why Pros Choose Transtar Autobody Technology TRM
- Convenient aerosol requires no equipment cleanup
- Excellent coverage
- Excellent adhesion
- Fast drying
How to Use
For use on primed/painted steel, bare steel, aluminum wheel wells, galvanized steel, frame rolls and bare aluminum
Specifications
| Part No. | 4373 |
|---|---|
| Product Line | TRM |
| MFR Model | 4373 |
| Application | For use on primed/painted steel, bare steel, aluminum wheel wells, galvanized steel, frame rolls and bare aluminum |
| Manufacturer | Transtar Autobody Technology |
| UPC | 845505000564 |
| Brand | TRANSTAR® |
| Color | Black |
| Container Size (oz) | 20 |
- Mix Ratio
- Ready to spray
- Shelf Life
- 1 year
- Compatible Substrates
- Aluminum, galvanized, steel
About Transtar Autobody Technology
Transtar Autobody Technology is a trusted manufacturer of professional auto body and refinish products used by collision repair shops and restoration specialists across North America.
Frequently Asked Questions
What substrates can I apply TRANSTAR® 4373 to?
The undercoat is compatible with aluminum, galvanized steel, and plain steel surfaces.
Do I need to mix this product before spraying?
No mixing is required; the can is ready to spray straight from the aerosol.
What personal protective equipment (PPE) is required when using this undercoat?
Wear eye protection, chemical-resistant gloves, protective clothing, and a respirator approved for organic vapors.
How long can I store the aerosol before it expires?
The product has a shelf life of one year when stored in its original sealed container.
Documents & Safety
Danger - This aerosol contains highly flammable solvents and toxic chemicals that can cause severe eye injury, skin burns, respiratory irritation, and long-term health effects such as cancer. Inhalation of mist may be fatal; the product is also an oxidizer and a potential aspiration hazard. Wear safety goggles or face shield, chemical-resistant gloves, protective clothing (coveralls), and use a suitable respirator with organic vapor filtration. Always refer to the full SDS before use.
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
Frequently asked
Good to know
This listing ships Transtar Autobody Technology TRM in a 20 (CN) container. Check the autofxmart catalog for other sizes and bulk pricing.
Most in-stock orders for Transtar Autobody Technology TRM 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 Transtar Autobody Technology 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 Transtar Autobody Technology TRM is 4373. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
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