US Chemical & Plastics
USC 44-4 Slow Activator 1 qt
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Hazardous material · Liquid
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Ground freight only (UPS/FedEx). Cannot ship via Air, USPS, or to PO boxes. APO/FPO addresses excluded.
WARNING: Cancer & Reproductive Harm
California Pro65 Warning: Cancer and Reproductive Harm
Tap for details → P65Warnings.ca.gov
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Overview
Built for the booth.
activator
USC® 44-4 Slow Activator is a 1-qt liquid hardener formulated for use with US Chemical & Plastics 40 4.2 VOC Glamour Urethane Clearcoat. It provides the controlled cure needed for multi-coat applications in automotive refinishing, allowing extended working time while delivering consistent film properties.
Mixed at a 4:1 ratio (activator to clearcoat), the activator offers a pot life of more than 5 hours at 78 °F (25.6 °C) and a flash time of 8-10 minutes between coats at 72 °F (22 °C). One quart covers approximately 610 sq ft at a 1.0 mil film thickness, with solids content of 45 %. It is compatible with e-coat and plastic substrates, making it suitable for a range of body shop repair scenarios.
Safety: The product carries a "Warning" signal word and multiple GHS hazards, including acute toxicity and skin corrosion. Use appropriate PPE-eye protection, gloves, protective clothing, and a respirator-and ensure adequate ventilation during mixing and application.
Why Pros Choose US Chemical & Plastics USC
- Two coat coverage
Application Guide
- Verify the substrate is a properly cured e-coat or plastic surface; clean and remove all contaminants before coating.
- Mix USC® 44-4 Slow Activator with 40 4.2 VOC Glamour Urethane Clearcoat at a ratio of 4 parts clearcoat to 1 part activator.
- Stir the mixture thoroughly; the mixed material will retain a usable pot life of greater than 5 hours at 78 °F (25.6 °C).
- Apply the clearcoat in the desired number of coats, allowing a flash time of 8-10 minutes between each coat when ambient temperature is around 72 °F (22 °C).
- After the final coat, allow the finish to cure according to the clearcoat's specifications; clean tools with an appropriate solvent as recommended by the clearcoat manufacturer.
Compatibility
Compatible paint systems: Urethane, Clearcoat.
Specifications
| Part No. | 44-4 |
|---|---|
| Product Line | USC |
| MFR Model | 44-4 |
| Standard/Approvals | California Pro65 Warning: Cancer and Reproductive Harm |
| Manufacturer | US Chemical & Plastics |
| UPC | 037307004448 |
| Brand | USC® |
| Rubberized | No |
| Container Size (qt) | 1 |
| Form | Liquid |
| Mixing Ratio | 4:1 |
- Mix Ratio
- 4:1
- Pot Life
- > 5 hours @ 78 °F / 25.6 °C
- Flash Time
- 8-10 min between coats @ 72 °F / 22 °C
- Coverage
- 610 sq ft @ 1.0 mil (solids 45 %)
- Compatible Substrates
- E-coat, plastic
About US Chemical & Plastics
US Chemical & Plastics 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 are compatible with USC® 44-4 Slow Activator?
It is approved for use on e-coat and plastic surfaces.
How long does the activator remain workable after mixing?
The pot life exceeds 5 hours when mixed at 78 °F (25.6 °C).
What is the recommended flash time between coats of the clearcoat system?
Allow 8-10 minutes between coats at 72 °F (22 °C) before applying the next layer.
What personal protective equipment is required when handling this product?
Wear eye protection, chemical-resistant gloves, protective clothing, and a respirator as specified on the SDS.
What coverage can I expect from one quart of USC® 44-4 Slow Activator?
The product covers approximately 610 sq ft at a film thickness of 1.0 mil, with 45 % solids by weight.
Documents & Safety
Warning: This activator is highly toxic if inhaled or swallowed, may cause cancer, serious eye injury, skin burns, and respiratory irritation. It is also flammable, an oxidizer, and can affect organs and reproductive health. Wear appropriate eye protection, chemical-resistant gloves, protective clothing, and a suitable respirator when handling. 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 US Chemical & Plastics USC in a 1 (QT) container. Check the autofxmart catalog for other sizes and bulk pricing.
US Chemical & Plastics USC uses a mix ratio of 4:1. Always measure activators and reducers accurately to maintain film properties and pot life — deviating from the ratio can cause adhesion or curing problems.
Most in-stock orders for US Chemical & Plastics USC 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 US Chemical & Plastics 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 US Chemical & Plastics USC is 44-4. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
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