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Do Don’t Stir the gelcoat by hand or low shear stirrer before use.
In the event filler sedimentation occurs during storage, make sure
this is completely redispersed again in the gelcoat before use.Allow vapor to be retained in deep mold sections as this
can cause slow curing.Ensure the gelcoat has attained a workshop temperature of 20°C -
25°C before use.Apply excessive thickness in corner areas as this can cause pre-release.
Add between 1.0 – 1.5% of a medium reactivity MEKP type catalyst.
Stir the gelcoat by hand or low shear stirrer.Apply backing laminate before the gelcoat has reached an
appropriate degree of cure.Apply a mist coat and then build up thickness in long, even passes
until the recommended wet film thickness of 0.5mm (500 micron) is reached.Stir the gelcoat with high shear mixers as this will
temporarily break down the thixotropy leading to drainage.Apply the first layer of laminate within 24 hours of gelcoat application.
Apply more or less than 500 microns in any area.
- Note 1: Successful application of Crestafire® GCS 1005PA depends on many variables such as the pump ratio, air input pressure, nozzle tip size and angle, tube hose size diameter and length. Scott Bader recommend the use of an airless spray machine with a minimum pump ratio of 20:1 and a nozzle size/angle of 623/50°. Alternatively, if using a standard gravity pot gun, use an air pressure of 4 - 5.5 bar (70 - 80 PSI) and a size 7 or 8 nozzle tip.
- Note 2: To maximize the fire properties, the gelcoat wet film should be applied at a thickness of 500 microns. The laminating process can be carried out approximately 1 hour after gelcoat application thereby ensuring excellent adhesion between the gelcoat and the backing resin. To ensure adequate adhesion between the gelcoat and the backing resin, lamination must occur within 24h from gelcoat application. For components that will be exposed to the outdoor environment, Scott Bader recommend the use of a suitable protective paint and/or varnish. The thickness of the final laminate and its entire construction, including any coatings, applications, sandwich components, etc., also has a decisive influence on fire performance.
Additives
The addition of fillers or pigments to Crestafire® GCS 1005PA will adversely affect the fire properties and cure of this material and is not recommended.
Before use
Crestafire® GCS 1005PA should be allowed to attain a working temperature between 23°C - 25°C before use for best spraying application. Stir well by hand or with a low shear stirrer to avoid aeration and then allow to stand to regain thixotropy. Crestafire® GCS 1005PA requires only the addition of a medium reactivity MEKP (50%) type catalyst to start the curing reaction. The catalyst should be added at 1.0% into the gelcoat and then thoroughly incorporated with a low shear mechanical stirrer where possible.
Post curing
For many applications, Crestafire® GCS 1005PA will perform adequately when cured at workshop temperature (20°C - 25°C). However, for optimum properties, and to achieve the highest fire performance, the components should be allowed to cure for 24 hours at 20°C, and then be oven-cured for 16 hours at 40°C or 3 hours at 80°C.
Properties
- Color
- Cured Properties
- Typical Gelcoat Properties (Uncured)
- Notes
* Curing Schedule - 24hrs at 20°C, 3hrs at 80°C.
| Value | Units | Test Method / Conditions | |
| Barcol Hardness (Model GYZJ 934-1) | 45 | — | EN59 |
| Water Absorption (24 hours at 23°C) | 53 | mg | BS EN ISO 62 part 6.2 |
| Heat Deflection Temperature (1.8MPa)* | 60 | °C | BS EN ISO 75-2 (1996) |
| Elongation (at Break)* | 0.8 | % | BS EN ISO 527-2 |
| Tensile Strength* | 25 | MPa | BS EN ISO 527-2 |
| Value | Units | Test Method / Conditions | |
| Viscosity (ICI cone and plate) | 7.5 | Poise | — |
| Viscosity Rotovisco (1, 25°C, 60mm C&P, 6 s⁻¹) | 60 | Poise | — |
| Viscosity Rotovisco (1, 25°C, 60mm C&P, 0.6 s⁻¹) | 140 | Poise | — |
| Specific Gravity (at 25°C) | 1.4 | — | — |
| Volatile Content | 24 | — | — |
Regulatory & Compliance
- Certifications & Compliance
- Quality Standards
- Approvals
Properly cured laminates produced with a selected grade of Crestapol® resin and gelcoat Crestafire® GCS 1005PA can achieve HL3 - R1 fire rating as per EN 45545-2:2013 for railway applications.
Technical Details & Test Data
- Geltimes & Back-up Times
Temperature Geltime (1.0% MEKP 50%)** Back-up time (1.0% MEKP 50%)**
25°C 10 - 14 minutes 45 - 60 minutes **Geltimes and back-up times tested under laboratory conditions and are to be used for guidance only. For longer geltimes, alternative catalysts and/or inhibitors can be used.
Packaging & Availability
- Country Availability
- Packaging Type
- Regional Availability
- Packaging Information
Crestafire® GCS 1005PA is supplied in 25kg kegs and 225kg drums.
Storage & Handling
- Shelf Life
- 3 Months
- Storage Information
Crestafire® GCS 1005PA should be stored between 5°C and 25°C in the original, unopened container in a dry, well-ventilated place. Protect from freezing and direct sunlight. Avoid contact with oxidizing agents. Stored outside of these recommendations, shelf life will be significantly reduced.