East System Hardener Intermediate Part B
East System 834 Intermediate Hardener (Part B) gives East System 1032 Epoxy Resin a longer working time for coating, glassing and laminating. Mix 5 parts resin to 1 part hardener by volume. It is the hardener supplied in the East System Epoxy Kit, and it blends with 833 Fast Hardener to shorten the pot life when needed.
Features
- 5:1 mix by volume (100:18 by weight) with East System 1032 Epoxy Resin
- Pot life 20–25 minutes and working time 20–30 minutes at 22 °C
- Sandable in 10–12 hours at 22 °C; full cure in 7 days
- Blends with 833 Fast Hardener to adjust working time
- Cures as low as 5 °C
- Available in 0.19 L, 0.74 L, 3.29 L and 42 L sizes
Recommended Uses
- Coat and waterproof wood, metal, plastic and most porous surfaces
- Laminate with fiberglass, carbon and Kevlar
- Glue, fill and fair with the addition of fillers
Cure Times by Hardener
| Property | 833 Fast | 834 Intermediate |
|---|---|---|
| Mix ratio by volume | 5:1 | 5:1 |
| Mix ratio by weight | 100:18 | 100:18 |
| Pot life at 22 °C / 71 °F | 8–10 min | 20–25 min |
| Working (gel) time at 22 °C | 15–18 min | 20–30 min |
| Sandable at 22 °C | 6–8 hrs | 10–12 hrs |
| Pot life at 12 °C / 54 °F | 18–20 min | 35–40 min |
| Sandable at 12 °C | 12–14 hrs | 20–24 hrs |
| Full cure | 5 days | 7 days |
How to Use
- Surface prep: apply directly to clean, dry wood. For fiberglass or metal, clean with acetone or lacquer thinner, sand with 220 grit or coarser and remove the dust. Do not use Varsol or petroleum-based solvents.
- Mixing: 5 parts resin to 1 part hardener by volume. Measure with graduated containers or pumps, mix thoroughly while scraping the sides and bottom, and spread with a solvent-resistant brush, roller or squeegee.
- Recoating: recoat with epoxy as soon as the previous coat is tacky (2–6 hours). Sand with 80 grit once it sands without clogging (8–24 hours).
- Paint or varnish after a 7-day full cure: sand to 220 grit, remove the dust with water and a clean cloth, and let it dry at least 1 hour.
- Working time roughly doubles for every 8 °C drop and halves for every 8 °C rise. Spread the mix out quickly; volumes over 100 mL get hot if left in the pot.
Safety: EAST System Hardener (Part B) is labelled DANGER: causes severe skin burns and eye damage; may cause an allergic skin reaction; harmful if swallowed or inhaled; may damage fertility or the unborn child; causes damage to organs (respiratory tract) through prolonged or repeated exposure; harmful to aquatic life with long lasting effects. Read all safety instructions before use, work in a well-ventilated area, and wear protective gloves, clothing and eye and face protection. Store locked up. For safety information, refer to the Safety Data Sheet below.
Data Sheets