Finish 1
Finish 1 FH611-4 Fast Universal Hardener 1 qt Can
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WARNING: Cancer & Reproductive Harm
This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.Tap for details → P65Warnings.ca.gov
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Overview
Built for the job.
Finish 1™ offers a selection of reducers, hardeners, and cleaner solvents for primers, sealers and gun cleaners. Finish 1™ hardeners are available in fast, medium and slow temperature ranges for use in Finish 1™ ultimate spot/panel clear coat, overall clear coat, sealers, and 3.5 VOC acrylic enamel factory packaged…
Sherwin‑Williams Finish 1 FH611‑4 Fast Universal Hardener is a liquid hardener formulated for rapid cure of basecoat systems on e‑coat substrates. Packaged in a 1 qt can, it provides the high‑strength cross‑linking required for automotive refinishing and collision repair applications.
Key performance figures include a 15 min dry time at 120 °F and a recoat window of 10–15 min for basecoat. The hardener offers a 1‑hour pot life at 75 °F, allowing ample working time before mixing. With a coverage rate of 627 ft² per gallon at a 1 mil dry film thickness, two coats will typically be required to achieve full hardness. VOC content is 2.2 g/L, meeting low‑emission standards.
Safety handling requires a “Warning” signal word. Use eye protection, chemical‑resistant gloves, and a respirator in a well‑ventilated area. The product has a flash point of 135 °F and carries acute toxicity, aspiration, and flammability hazards; follow H611 first‑aid instructions for inhalation, skin, and ingestion incidents.
Why Pros Choose Finish 1 Fast
- For use in 3.5 VOC finish 1 factory packaged single stage colors and other finish 1 products
Application Guide
- Stir the hardener thoroughly; it has a pot life of 1 hour at 75 °F.
- Apply the hardener by spray to the prepared e‑coat substrate.
- Apply the first coat and allow a recoat time of 10–15 minutes.
- After the second coat, dry for 15 minutes at 120 °F before handling.
Compatibility
Compatible paint systems: Enamel, Acrylic, Solvent.
Specifications
| Part No. | FH611-4 |
|---|---|
| Product Line | FNH |
| MFR Model | FH61114 |
| Standard/Approvals | GHS and OSHA Hazards | VOC Compliant |
| Manufacturer | Finish 1 |
| Trade Mark | Finish 1™ |
| UPC | 764423162027 |
| Brand | Sherwin-Williams® |
| Maximum Sale Quantity | 12 |
| Maximum Sale Day | 7 |
| Rubberized | No |
| Container Size (qt) | 1 |
| Container Type | Can |
| Form | Liquid |
| Type | Fast |
| Mixing Ratio | 1:4 |
- Dry Time
- 15 min @ 120 °F
- Recoat Time
- 10‑15 min (basecoat)
- Pot Life
- 1 hr @ 75 °F
- Coverage
- 627 ft²/gal @ 1 mil dry
- VOC
- 2.2 g/L
- Compatible Substrates
- e‑coat
- Number of Coats
- 2
About Finish 1
Finish 1 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 Finish 1 FH611‑4 Fast Universal Hardener?
It is formulated for use over e‑coat (electrocoat) surfaces.
How long does it take to dry and when can I recoat?
Dry time is 15 minutes at 120 °F. Recoat can be applied 10–15 minutes after the first coat when the surface is dry.
What is the pot life of the hardener?
The mixed material remains usable for 1 hour at 75 °F.
What personal protective equipment is required?
Wear eye protection, chemical‑resistant gloves, and a respirator approved for organic vapors.
What is the coverage rate?
One gallon covers approximately 627 sq ft at a 1‑mil dry film thickness (≈0.13 qt per 81 sq ft).
Documents & Safety
- Safety Data Sheet (SDS)
- sherwinwilliams_fh61118_specification_sheet.pdf
- fh611_msds-en__us_en__us.pdf
Warning: This fast universal hardener is flammable, toxic if inhaled, and may cause skin and eye irritation or damage. It is classified as a carcinogen and can affect the respiratory system. Use appropriate personal protective equipment—wear safety glasses or a face shield, chemical‑resistant gloves, and a respirator fitted for organic vapors. Avoid skin contact and inhalation, and keep away from ignition sources. 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.
Specifications
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