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Cromar PRO GRP Hardener is a general purpose MEKP and gives consistent room temperature curing of unsaturated polyester resins and gelcoat/topcoats.
- Suitable applications include hand lay-up, spray-up, RTM, continuous laminating, centrifugal casting, filament winding, polymer concrete and vacuum infusion
- Methyl Ethyl Ketone peroxide in phlegmatizer
- For the curing of unsaturated polyester resins at ambient temperature in combination with colbalt accelerators
- 80ml Catalyst Dispensing Bottle also available
- Part of the Cromar Pro GRP Roofing System
Cromar PRO GRP Hardener is a general purpose MEKP and gives consistent room temperature curing of unsaturated polyester resins and gelcoat/topcoats. Part of the Cromar Pro GRP Roofing System.
A Methyl Ethyl Ketone peroxide in phlegmatizer for the curing of unsaturated polyester resins at ambient temperature in combination with colbalt accelerators.
A reliable product of remarkable purity, Cromar PRO GRP Hardener assures quality in almost every system. Suitable applications are hand lay-up, spray-up, RTM, continuous laminating, centrifugal casting, filament winding, polymer concrete and vacuum infusion.
Using a standard type of pre-accelerated Polylite Polyester resin 1-4% Cromar PRO GRP Hardener is normally added and for Cromar PRO GRP Gelcoat/Topcoat 1-4% (Subject to temperature).
What is PRO GRP?
GRP stands for Glass Reinforced Polyester and is also known as Glass-Fibre.
This system is cold applied on site, giving it a seamless and flexible weatherproof finish that resists water, heat and frost.
The resulting surface gives a strong architectural finish that looks very impressive. If maintained properly it will last as long as the building stands.
Cromar have developed this technology further to produce the perfect all weather protection for any flat roof. PRO GRP can be applied in small domestic situations right through to large industrial environments.
Benefits of a GRP System
- COLD APPLIED - no heat required
- EASY TO FORM - around complex situations
- VERY DURABLE - resists heavy foot traffic
- NON-SLIP WALKWAYS - can be incorporated
- CLASS LEADING ROOFING SOLUTION - that far exceeds traditional methods
- VIRTUALLY MAINTENANCE FREE - for very long periods of time
- IMPACT RESISTANT - due to its ultra hard finish
- FIRE RETARDANT
- HIGHLY ECONOMICAL SOLUTION
Quick Links - Click To Jump To Section:
- Features & Benefits
- Application
- Coverage
- Temperature / Catalyst Required
- Product Data
- Cure Characteristics
- Storage
Features & Benefits
- General purpose MEKP
- Gives consistent room temperature curing of unsaturated polyester resins and gelcoat/topcoats
- Suitable applications include hand lay-up, spray-up, RTM, continuous laminating, centrifugal casting, filament winding, polymer concrete and vacuum infusion
- Methyl Ethyl Ketone peroxide in phlegmatizer
- For the curing of unsaturated polyester resins at ambient temperature in combination with colbalt accelerators
- Part of the Cromar Pro GRP Roofing System
Application
For full application instructions download the PRO GRP Installation Guide.
Coverage
The values above are recommended coverage rates for estimating purposes we would recommend coverage rates or 1.5kg/m2 for resin, and 0.5 kg/m2 for top coat.
Temperature / Catalyst Required
Note: These temperature breaks are approximate. Always test catalyst additions with your first mix and adjust up or down as required.
Summer / Winter
Cromar DO NOT recommend laminating in temperatures below 5℃ and above 35℃ ambient temperature, please consult our technical department on 0113 2455450 (option 2) or send a message to [email protected].
Product Data
Product Data | |
---|---|
Active oxygen | 9.1 ± 0.1 % |
Free hydrogen peroxide | 1.7 ± 0.1 % |
Flash point (seta flash) | > 80°C |
Water content | 1.50% |
Supplied as | Liquid |
Specific weight at 23°C | 1.10 - 1.13 |
Colour | Water-white |
Viscosity at 23°C | 19 - 22 mPa s (cP) |
Ph | 4 - 7 |
SADT | 65°C |
Solubility | Insoluble in water. Soluble in oxygenated organic solvents. |
Cure Characteristics
Cure Characteristics | |
---|---|
Resin | Polylite 440-000 |
Resin Temp | 23°C |
Acc.conmc. | 1% Accelerator 9802P |
Per.1 | 1% |
Initiator | Gel Time Min | Gel to Peak Min | Peak Exotherm |
---|---|---|---|
Cromar PRO GRP Hardener | 13,8 | 27,7 | 98 |
Storage
- Storage at 25°C or below is recommended. Storage below 20°C is recommended for maximum shelf life.
- Store in original containers away from flammables and all sources of heat, sparks or flames; out of direct sunlight and away from promoters, accelerators, reducing agents and strong acids or bases.
- Leaking containers – Remove and isolate in safe area. Re-package or dispose (see later section) immediately.
- Never store in refrigerators containing food and/or beverages.
Data sheet
- Manufacturer
- Cromar
- Single, Two or Three Pack
- Two-Pack
- Product Usage Type
- Hardener
- Product Range
- Pro GRP
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IMPORTANT SHIPPING & DELIVERY INFORMATION
Cromar PRO GRP Hardener is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.
Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.
Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.
All delivery costs below are excluding VAT
Cromar PRO GRP Resin
Cromar PRO GRP Resin is a cold applied polyester resin designed specifically for Roofing Applications. Easy to form around complex situations, Pro GRP Resin is durable and able to resist foot traffic, an essential component in roofing systems. Very low styrene emission Low viscosity allowing rapid and efficient fibre wet-out Long pot life...
Cromar PRO GRP Topcoat
For use in flat roofing applications where regulations specify a fire-retardant system. Conforms to BS476 Part 3:2004, FAB classification. Pre-pigmented, isophthalic acid based, filled fire-retardant roofing top-coat Excellent water and weather resistance providing a maintenance-free surface Tack-free and water-tight Exhibits good...