Description:
REL-8358 is a transparent gel coat specially designed for water park facilities such as water slides, wave pools, and interactive water playgrounds. It requires excellent water resistance, chlorine resistance, UV yellowing resistance, and abrasion resistance to withstand the harsh conditions of high passenger flow, continuous water immersion, and disinfectant chemicals, maintaining long-term aesthetics and safety.
Performance Attributes:
Medium reactivity. Good crack resistance, good water resistance
Type:
ISO
REL-8358 is a transparent gel coat specially designed for water park facilities such as water slides, wave pools, and interactive water playgrounds. It requires excellent water resistance, chlorine resistance, UV yellowing resistance, and abrasion resistance to withstand the harsh conditions of high passenger flow, continuous water immersion, and disinfectant chemicals, maintaining long-term aesthetics and safety.
| Product Name | Description | Performance Attributes | Type | Application |
| REL-8358 | Gel coat base resin | Medium reactivity. Good crack resistance, good water resistance | ISO | Gel Coat Base Resin |
PROPERTIES OF UNCURED RESIN(25ºC):
| TEST ITEMS | UNIT | VALUE | METHOD |
| Appearance | --- | Clear, yellowish liquid | GB/T8237.6.1.1 |
| Brookfield viscosity at 25ºC | cp | 600-800 | GB/T7193.4.1 |
| Gel time | min | 6.0-12.0 | GB/T7193.4.6 |
| Acid Value | mgKOH/g | 12.0-18.0 | GB/T2895 |
| Non-Volatile Content | % | 60.0-64.0 | GB/T7193.4.3 |
| APHA Color | ≤100 | GB/T605 |
* Gel time test: 0.6Co/naph:2%+ AKZO M-50:2%
PROPERTIES OF CURED RESIN:
| TEST ITEMS | UNIT | VALUE | METHOD |
| Tensile Strength | MPa | 75 | GB/T2568 |
| Tensile Modulus | MPa | 3000 | GB/T2568 |
| Elongation at Break | % | 5.0 | GB/T2568 |
| Flexural Strength | MPa | 130 | GB/T2570 |
| Flexural Modulus | MPa | 3500 | GB/T2570 |
| Impack Resistance | KJ/M2 | 14 | GB/T1451 |
| HDT (1.80 MPa) | ºC | 80 | GB/T1634 |
| Barcol Hardness | --- | 44 | GB/T3854 |
| Water Absorption at 25ºC | % | 0.12 | GB/T1034 |
* Curing schedule:1)0.6Co/naph: 1.5%+ AKZO M-50:1.5%
2) 24 hrs at 25ºC, 3 hrs at 60ºC, 2 hrs at 100ºC
Storage:
Stored at temperatures below 25ºC. Storage life decreases with increasing storage temperature. Avoid exposure to heat such as direct sunlight or steam pipes. To avoid contamination of the product with water, do not store outdoors. Keep sealed to prevent moisture pick-up and monomer loss. Mild mixing is recommended after prolonged storage. Rotate stock.


Applications: REL-8358 is the ideal solution for various high-demand FRP (Fiberglass Reinforced Plastic) surfaces, including:
Water Park Facilities: Water slides, splash pads, and themed aquatic play structures.
Swimming Pools: Surface finishing for luxury fiberglass pools and spa shells.
Marine Equipment: Protective topcoats for boats, yachts, and personal watercraft requiring a clear finish.
Decorative Composites: Transparent surfacing for artificial rockwork, outdoor sculptures, and architectural fiberglass panels.

Changzhou RealLand Composite Material Technology Co., Ltd.
Founded in 2000, RealLand is a integrated enterprise, provides specialty chemical products,services and solutions for many of world’s most essential industries. Serving customers in more than 10 countries,it operates through 3 production units: RealLand composite resins (unsaturated polyester resin/ epoxy vinyl ester resin/ Gel coat), RealLand SMC/BMC, RealLand special adhesives, which are used in the construction, transportation, infrastructure, boatbuilding and energy engineering markets.
We stand behind our products and our customers. RealLand's commitment to support is as strong as the materials we create.





Q: Can I Request a Sample of Unsaturated Polyester Resin?
A: Yes, we can provide 10kg of resin as a free sample, but freight are typically the responsibility of the buyer.
Q: Can I Customize the Formulation of Unsaturated Polyester Resin for My Project?
A: Yes, absolutely. We understand that different projects may have unique requirements. Our R & D department is well-equipped to handle custom formulations based on your specific needs. You can provide us with the details of your project, including any specific characteristics or performance criteria you are looking for, and our experts will work on tailoring a formulation that meets your requirements.
Q: How Do I Choose the Right Unsaturated Polyester Resin for My Application?
A: We would provide guidance on selecting the appropriate UPR based on different project requirements.
Q: What Certifications and Quality Standards Does Your Unsaturated Polyester Resin Meet?
A: Our Unsaturated Polyester Resin meets CCS, RoHS, REACH, EMS, and QMS certifications and quality standards.
Q: What is The Product Lead Time?
A: 10 days.
Q: What's Shelf Life of Unsaturated Polyester Resin?
A: Normally 8 months.
Q: Can I Get a Lower Price for a Large Quantity Order?
A: Absolutely. The online price serves as a reference, but due to fluctuations in raw material costs, our sales team can provide you with the most accurate and competitive pricing. Before making a purchase, kindly engage with our sales representatives. They will work closely with you, taking into account your order quantity and specific requirements, to ensure you receive the best and most cost-effective pricing tailored to your needs.

RealLand is a integrated enterprise, provides specialty chemical products, services and solutions for many of world’s most essential industries.
E-mail: castle@reallandcomposite.com
Mobile: 0086-13775214842
WhatsApp: +86-13775214842
Add: 2305-2306, Changfa Plaza Office Building, No. 101-1, The Taihu Lake East Road, Xinbei, Changzhou, Jiangsu, China