Morton 300-4 High Build Polyester Primer, 1 qt Can,
Eliminator HB Polyester Primer. The versatility of this low 2.1 VOC primer surfacer allows use on a variety of substrates.
Morton 300-4 High Build Polyester Primer is a professional-grade gray primer designed for automotive refinishing and collision repair applications. This 1-quart formulation provides excellent build characteristics for filling minor surface imperfections while maintaining smooth application properties across multiple substrate types.
The primer offers efficient workflow timing with a 3-5 minute flash time between coats and 20-minute curing capability. With a working pot life of 30-45 minutes at 75°F and 50% relative humidity, technicians have adequate time for mixing and application. Coverage reaches 300 square feet per ready-to-spray gallon at 3 mils dry film thickness. The versatile formulation adheres to aluminum, fiberglass, plastic, polyester, existing primer, and steel substrates, making it suitable for diverse repair scenarios.
Why Pros Choose Morton Paint Company Distributed by US Chemical High Build
- High solids, premium polyester High fill and build for fast coverage, easy to sand, includes hardener
- The versatility of this low 2.1 VOC primer surfacer allows use on a variety of substrates
How to Use
For filling imperfections, such as scratches and pinholes and for restoration work
- Prepare substrate surface. Ensure aluminum, fiberglass, plastic, polyester, primer, or steel surfaces are clean and properly prepared for coating.
- Mix components by volume according to specified ratio. Mixed material has 30-45 minutes pot life at 75°F/50% RH.
- Apply primer evenly to achieve 3 mil thickness. Product covers 300 sq. ft. per RTS gallon at recommended thickness.
- Allow 3-5 minutes flash time between coats if applying multiple coats.
- Allow 20 minutes curing time before proceeding with additional coating operations.
Compatibility
Compatible paint systems: Polyester.
Specifications
| Part No. | 300-4 |
|---|---|
| Product Line | MOR |
| MFR Model | 300-4 |
| Standard/Approvals | California Pro65 Warning: Cancer and Reproductive Harm |
| Application | For filling imperfections, such as scratches and pinholes and for restoration work |
| Manufacturer | Morton Paint Company Distributed by US Chemical |
| UPC | 037307300403 |
| Brand | Morton |
| Maximum Sale Quantity | 6 |
| Maximum Sale Day | 7 |
| Rubberized | No |
| Solids Content | 63% |
| Color | Gray |
| Container Size (qt) | 1 |
| Container Type | Can |
| Form | Liquid |
| Type | High Build |
- Flash Time
- 3 - 5 minutes between coats
- Pot Life
- 30 - 45 minutes at 75°F / 50% RH
- Coverage
- 300 sq. ft. per RTS gallon at 3 mils
- Compatible Substrates
- Aluminum, fiberglass, plastic, polyester, primer, steel
About Morton Paint Company Distributed by US Chemical
Morton Paint Company Distributed by US Chemical 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 surfaces can I use this primer on?
Morton 300-4 High Build Polyester Primer is compatible with aluminum, fiberglass, plastic, polyester, existing primer, and steel substrates.
What's the flash time between coats?
Allow 3-5 minutes flash time between coats before applying additional material.
How much working time do I have after mixing?
The pot life is 30-45 minutes at 75°F and 50% relative humidity once components are mixed.
What coverage can I expect from this primer?
You'll get approximately 300 square feet of coverage per ready-to-spray gallon when applied at 3 mils thickness.
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