MAS Fast Hardener – 2:1 Non-Blushing Epoxy Hardener
MAS Fast Hardener is the quickest of the three MAS 2:1 non-blushing hardeners. Mixed 2:1 by volume with MAS LV or FLAG Resin, it gels in about 10 minutes (150 g at 25 °C) and is tack-free in about 2 hours. That makes it ideal for small glue-ups, bonding hardware, spot filling and fairing, and for overnight cures in cool shops. It can also be blended with MAS Medium or Slow Hardener to speed them up; keep the 2:1 resin-to-hardener ratio whatever blend you use.
Features
- Fastest MAS 2:1 hardener: about a 10-minute gel and 2-hour tack-free time at 25 °C
- Non-blushing: no wash-downs between coats
- Great for small gluing jobs, hardware bonding, spot filling and fairing
- Helps epoxy cure in cooler temperatures (minimum 55 °F / 13 °C)
- Blend with MAS Medium or Slow Hardener for custom working times
- Mix small batches; fast epoxy builds heat quickly in the cup
Specifications
| Property | Details |
|---|---|
| Mix ratio by volume | 2:1 (resin:hardener) |
| Mix ratio by weight | 100:46 |
| Gel time, 150 g at 25 °C (77 °F) | 10 min |
| Tack-free time at 25 °C | 2 hrs |
| Full cure at 25 °C | 2 days |
| Mixed viscosity at 25 °C | 650 cP with LV Resin, 1,100 cP with FLAG Resin |
| Minimum working temperature | 55 °F (13 °C) |
| Compatible resins | MAS LV Resin, MAS FLAG Resin |
Working and cure times for all three MAS hardeners:
| Property | Fast | Medium | Slow |
|---|---|---|---|
| Mix ratio by volume | 2:1 | 2:1 | 2:1 |
| Mix ratio by weight | 100:46 | 100:45 | 100:45 |
| Gel time, 150 g at 25 °C (77 °F) | 10 min | 25 min | 40 min |
| Tack-free time at 25 °C | 2 hrs | 3 hrs | 5 hrs |
| Full cure at 25 °C | 2 days | 3.5 days | 5 days |
| Minimum working temperature | 55 °F (13 °C) | 55 °F (13 °C) | 55 °F (13 °C) |
Safety and storage: MAS Fast Hardener (Part B) is labelled DANGER: harmful if swallowed; toxic in contact with skin; causes severe skin burns and eye damage; may cause an allergic skin reaction; harmful if inhaled; may damage fertility or the unborn child; very toxic to aquatic life; harmful to aquatic life with long lasting effects. Wear nitrile gloves, safety glasses and long sleeves, and work in a well-ventilated area. Clean uncured epoxy off skin with soap and water, never solvents. Store between 60 and 90 °F (16–32 °C) in a dry place, off cold floors and away from outside walls, and do not freeze. If the resin crystallizes, warm it to 125–140 °F (52–60 °C) and stir until clear. For safety information, refer to the Safety Data Sheet below.
Data Sheets