MEKP Catalyst
MEKP (Methyl Ethyl Ketone Peroxide)
- Purpose: Acts as a catalyst to cure polyester and vinyl ester resins.
- How It Works: When mixed with resin, MEKP initiates a chemical reaction that generates heat, causing the resin to solidify.
- Measurement: Accurate measurement is crucial for proper curing. Use the MEKP Catalyst Dispenser for precise dispensing. Check out out MEKP chart on the next slide to ensure you are using the right amount.
Application Tips
- Mixing Ratio: Follow the manufacturer’s recommended ratio of MEKP to resin. Too much or too little can affect the curing process.
- Mix Thoroughly: Ensure that MEKP is evenly distributed in the resin for consistent curing.
- Work Quickly: The reaction generates heat and speeds up curing, so work within the recommended time frame to avoid premature hardening.
- Safety: MEKP is a strong chemical. Use it in a well-ventilated area and wear appropriate protective gear, such as gloves and goggles.
Useful Downloads: For more detailed information, including safety guidelines and mixing instructions, refer to the manufacturer’s downloadable resources.
Manufactured by Syrgis Performance, MEKP ensures reliable curing results for your resin projects.
MEKP Catalyst (Methyl Ethyl Ketone Peroxide) is the standard hardener used to cure polyester resin and vinyl ester resin in fiberglass and composite applications. When added to resin, MEKP initiates a chemical reaction that generates heat and hardens the material into a strong, durable finish.
We supply MEKP 925, a high-performance catalyst designed to provide reliable curing across a wide range of resin systems, including general-purpose polyester and vinyl ester resins.
How Much MEKP to Use
The typical mix ratio for MEKP is 1%–2% by volume, depending on temperature and working conditions. At standard shop conditions (around 70–75°F), the most common mix ratio is approximately 1.5%, or about 2 ounces per gallon of resin.
View our full MEKP Catalyst Mix Ratio Chart →
- 60–65°F: ~2.0% (longer cure time)
- 70–75°F: ~1.5% (standard mix)
- 80–85°F: ~1.0%
- 90°F+: ~0.75% (faster cure)
Pot life is typically 15–20 minutes at 75°F, but this can be adjusted by increasing or decreasing catalyst within safe limits.
What MEKP is Used For
- Curing polyester resin and vinyl ester resin
- Hardening gelcoat systems
- Controlling cure speed based on temperature
- Used in fiberglass repair, marine, and composite applications
How to Mix MEKP
- Measure accurately using a dispenser or measuring cup
- Add MEKP to resin (never the other way around)
- Mix thoroughly to ensure even curing
- Adjust ratio slightly depending on temperature and working time
Common Mistakes to Avoid
- Too much catalyst: Can cause cracking, overheating, or brittleness
- Too little catalyst: Resin may not fully cure
- Poor mixing: Leads to soft spots or uneven curing
System Compatibility
MEKP is used with:
- Polyester resin
- Vinyl ester resin
- Gelcoat
- Polyester-based fairing compounds
Safety Notes
- MEKP is a reactive and corrosive chemical—avoid skin and eye contact
- Always wear proper PPE (gloves, eye protection)
- Work in a well-ventilated area
- Keep away from heat, sparks, and open flame
Need Help?
See our MEKP Catalyst Chart for exact mix ratios, or contact us at orders@fiberglassflorida.com for help with your application.
| Manufacturer | Syrgis Performance |
|---|
Downloads
TDS Technical Data Sheet
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MEKP Catalyst Size: (41.6 KB) Downloads: 2 - MEKP Catalyst Size: (26.5 KB) Downloads: 5
- MEKP Catalyst Size: (179.29 KB) Downloads: 2
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