Product Name: High Performance Weatherproof Gel Coat for Urban Railway SystemsFlame RetardantGelcoat HS - LFI7035S
1. Brief Introduction:HS-LFI7035S Gelcoat is a premier intumescent flame retardant gel coat, crafted with Isophthalic-adipic acid unsaturated polyester resin as its base.
Ideal for spray processes, this pre-promoted gel coat enhances the surface of FRP products with superior flame retardancy.
.It finds application in
rail transit systems, wind turbine nacelle covers, ship accessories, and other areas demanding rigorous flame retardant properties.
2. Features: · Outstanding construction performance;
· Superior flame retardant capabilities (high oxygen index, low smoke density);
· Complies with fire protection standards UIC564-2 Class B
· Excellent water and weather resistance.
3. Gelcoat Properties:
| Test Item |
Unit |
Test Value |
Test Method |
| Appearance |
-- |
Gray paste liquid |
-- |
| Viscosity(25ºC) |
mP·s |
5000-8500 |
ISO2555:2018 Brookfield
RV/DV-I Spindle 6-10 RPM |
| Gel time(25ºC) |
min |
15.0-35.0 |
ISO2535:2003 |
| Thixotropic index |
-- |
≥3 |
ISO2555:2018Brookfield |
| RV/DV-I |
Gel time test: Curing agent M-50 (AKZO) 2%.
4 . Application Notes :1). Gently mix the gelcoat in the bucket before use, avoiding high shear rates and air entrapment during mixing.
2). The ideal application temperature should range between 18-25°C with humidity below 80%. Ensure the mold is
polished and cleaned before applying the gelcoat.
3). Prepare the mold to be dry, clean, and free of oil.
4). Fully wax the mold surface (avoid silicone-containing release wax). If using water-soluble release wax, wait for moisture to evaporate before spraying the gelcoat.
5). Use MEKP as the curing agent for the gelcoat (typically 1-3% dosage).
6). Ensure the total thickness of the gelcoat film is between 600 and 1000μm. Each spray layer should not exceed 0.2mm. Allow 2-3 minutes for solvent evaporation before reapplying to the desired thickness.
7). Check the gelcoat's cure degree before beginning lamination layers. Press your finger on the gelcoat film for 30 seconds; if no residue is left on your finger but the gelcoat remains sticky, you can proceed with lamination.
5. Operation Procedure:
Note: Use a paint spray can with air source pressure at 20 psi and a minimum air flow of 0.6 cubic meters per minute.
1). Prepare for spraying per the application guide.
2). Apply a thin layer of easily sandable primer (no thicker than 0.2mm) to the original mold surface using multiple thin layers, allowing for evaporation between layers. After 2 minutes, apply the next layer to the desired thickness. The primer will dry within 1 hour, after which you can begin sanding.
3). Dry sand with 220-320 grit sandpaper, followed by 600-1200 grit water sandpaper, and polish.
6. Storage:
1) To maintain the integrity and quality of our High Performance Weatherproof Gel Coat for Urban Railway Systems, avoid exposure to heat sources such as direct sunlight or steam pipes. Store it in a dry, cool place with temperatures kept below 25ºC.
2) Ensure the container remains tightly sealed to prevent moisture absorption and monomer loss. Storing the product outside the recommended conditions for prolonged periods can affect crucial properties such as viscosity and gel time.
3) When transporting our High Performance Weatherproof Gel Coat for Urban Railway Systems, adhere to the 'Chemistry Dangerous Articles Safety Management Regulations' set by the State Council. Due to the presence of styrene monomer, this product is classified as hazardous and flammable.
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