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.
Cromar PRO GRP Resin is a pre-promoted, thixotropic, medium reactive polyester resin designed specifically for Roofing Applications and formulated to give extremely low styrene emission. Cold applied and easy to form around complex situations, Pro GRP Resin is durable and able to resist foot traffic, an essential component in roofing systems.
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
For full application instructions download the PRO GRP Installation Guide.
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.
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].
Physical Data in Liquid State at 25°C
| Test | Units of Measure | Nominal |
|---|---|---|
| Viscosity; Brookfield LV3 @ 60 rpm | cps | 450 |
| Thixotropic Index; 6/60 | - | 3.25 |
| Styrene Content | % | 41 |
| Gel Time; 100g 1.25% catalyst | minutes | 14 |
| Peak Exotherm | oC | 110 |
Mechanical Data in the Cured State
| Test | Units of Measure | Nominal | Test Method |
|---|---|---|---|
| Tensile Strength | MPa | 79 | ISO 527-1 |
| Tensile Modulus | GPa | 4.1 | ISO 527-1 |
| Tensile Elongation | % | 2.5 | ISO 527-1 |
| Flexural Strength | MPa | 105 | ISO 178 |
| Flexural Modulus | GPa | 4.2 | ISO 178 |
| Heat Distortion Temperature | °C | 74 | ISO 75-A |
Resins are stable for six months from date of production when stored in the original containers away from sunlight at no more than 21°C. After extended storage, some drift may occur in gel time.
During the hot summer months, no more than two months stability at 30°C should be anticipated.
Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.
 pblanch on 2023-05-26 14:31:17 | Question: can i use it on brickweave |
Answer from Rawlins’ Technical Team: This product is designed for roofing applications when used as part of a Cromar Pro GRP Roofing System not for use on brick weave paths or driveways. You could consider Hydron Mona-Guard Block Paving Sealer. | |
Cromar PRO GRP Resin 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 Trims, Corners & Outlets, for use with Cromar`s Advanced Glassfibre Roofing System.Range of trims includes drip, raised edge, simulated lead flashing, angle fillet and roll mop External and internal raised angle trims Corner trims also available, in 7 configurations 3 configurations of rainwater outlets to choose from...
£7.69 (incl. VAT)
£6.41 (ex. VAT)
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...
£85.02 (incl. VAT)
£70.85 (ex. VAT)
Cromar PRO GRP Acetone, solvent used for cleaning tools and areas contaminated with adhesives, polyesters, resins and other similar products. Also known as Propan-2-one, 2-propanone, di-methyl ketone.Part of the Cromar Pro GRP Roofing SystemMore Information Delivery Info
£33.66 (incl. VAT)
£28.05 (ex. VAT)
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...
£18.64 (incl. VAT)
£15.53 (ex. VAT)
Cromar Application Tools are a range of application tools and accessories for use when applying products from the Cromar range. Range includes:Resin Rollers and Refills Bubble Buster Rollers GRP Paint Brushes Mixing and Graduating Buckets Applicator gunsMore Information Delivery Info
£2.10 (incl. VAT)
£1.75 (ex. VAT)
A handy kit containing everything required to install GRP for a 13 sqm roof. Roofing kit contains: 1 x 20kg Pro GRP Resin 1 x 10kg Pro GRP Top Coat 1 x 450 Fibre Glass Matting 6.75kg (approx.)Includes GRP Accessory Kit (see further below for full contents) GRP roofing trims required (sold separately) Cold applied - no heat...
£394.01 (incl. VAT)
£328.34 (ex. VAT)
