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FREE DELIVERY ON ALL ROOF KITS (UK MAINLAND)
Stronghold MEKP Catalyst (5kg)
or
This high-quality methyl ethyl ketone peroxide (MEKP) catalyst is specifically designed and tested for use with the Stronghold GRP roofing system. It activates the curing process in both the Stronghold Base Resin and Stronghold Topcoat and is added at a rate of 1–4% by weight depending on temperature and working conditions.
Stronghold catalysts are formulated to work with the system without affecting the fire-retardant performance or certification of the Stronghold roofing products.
The bottles feature vented safety caps in line with current health and safety regulations, while the 1kg containers include separate dispensing chambers and child-resistant caps for controlled and safer dosing on site.
MEKP Catalyst for Stronghold GRP Roofing Systems
Stronghold Catalyst is a high-quality methyl ethyl ketone peroxide (MEKP) curing agent used to activate both Stronghold Base Resin and Stronghold Topcoat during fibreglass roofing installations.
Polyester resins require catalyst to trigger the chemical curing reaction that hardens the laminate and topcoat layers. Without the correct catalyst addition the resin will not cure properly.
This catalyst has been specifically designed, tested and approved for use within the Stronghold GRP roofing system, ensuring reliable curing performance without affecting the fire-retardant properties of the system.
Correct Catalyst Ratios
Catalyst must be added to both the base resin and topcoat during installation.
The recommended dosage rate is:
1% – 4% catalyst by weight
The correct ratio depends on working conditions including:
• ambient temperature
• resin temperature
• roof surface temperature
• working time required
In warmer summer conditions installers typically reduce catalyst levels, while cooler temperatures may require slightly higher percentages to maintain proper curing times.
Designed for Reliable GRP Curing
Using the correct catalyst is critical to achieving:
• proper laminate curing
• correct topcoat hardening
• consistent working times
• reliable long-term performance of the roofing system
Stronghold catalyst has been developed specifically to work with the Stronghold resins, ensuring compatibility and consistent curing results.
Fire Rating Compatibility
Stronghold roofing systems are designed to meet fire performance standards when installed correctly.
This catalyst has been tested for use with the system to ensure no loss of fire-retardant properties or performance ratings when used according to installation guidelines.
Safety Features
All Stronghold catalyst containers are supplied with vented caps to comply with current health and safety legislation when storing and handling MEKP products.
The 1kg bottles also feature a separate dispensing chamber, allowing installers to measure catalyst more accurately during mixing.
Caps on the 1kg containers are also child-resistant for additional safety on site.
Typical Use in GRP Roofing Installations
This catalyst is used when:
• mixing Stronghold Base Resin for laminating fibreglass matting
• preparing Stronghold Topcoat for the final protective coating
• adjusting curing times based on site temperatures
Correct catalyst dosing ensures the laminate cures fully and the roofing system performs as intended.
Free UK mainland delivery on all roofing kits and orders over £400.
Choose your delivery date and time slot at checkout.
For hazardous goods and non-parcel (pallet) deliveries, someone must be present to receive and sign for the delivery.
Next Day Delivery
Order cut off 12.30pm for Next day delivery. Next working day delivery available for most UK mainland areas. However, next working day delivery is not guaranteed and depends on courier performance
Deliveries are made Monday to Friday only (excluding weekends and bank holidays).
Delivery Charges
Delivery charges are shown live in your basket as you shop and are confirmed at checkout based on your delivery postcode.
Delivery exceptions
Deliveries to Northern Ireland, Republic of Ireland, Isle of Wight, Isle of Man, Guernsey, Jersey, Alderney, Scottish Highlands & Islands, and postcodes such as AB, IV, KW, PA20+, PH19+:
- May take longer
- May not be eligible for next working day delivery
- May incur an additional transport charge
- May be price on application (POA)
Returns
Items can be returned within 30 days of delivery.
Return postage is the buyer’s responsibility, although we can help arrange collection.
Please see our Returns Policy for details.
Stronghold MEKP Catalyst (5kg)
Benefits
