Description:
REL-270 is a gel coat resin specifically designed for the hulls and high-end marine vessel surfaces of yachts. It aims to provide exceptional high gloss, fullness, and weather resistance, effectively resisting seawater erosion, UV radiation, and surface aging caused by the marine environment. It is a key surface material for protecting and beautifying boat hulls.
Performance Attributes:
Fast curing, good stain resistance, good water resistance and good weather resistance
Type:
ISO-NPG
REL-270 is an isophthalic /NPG unsaturated polyester resin developed for gel coat base resin;
Excellent transparency, water resistance, weather resistance, pollution resistance; High toughness and comprehensive mechanical strength;
Compared with conventional Iso/NPG type resins such as REL-8305, there is a significant improvement in the construction performance, overall strength, and water resistance of the gel coat.
| Product Name | Description | Performance Attributes | Type | Application |
| REL-270 Gel-Coated Polyester Gel Coat Resin | Gel coat base resin | Fast curing, good stain resistance, good water resistance and good weather resistance | ISO-NPG | 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 | cp | 600-800 | GB/T7193.4.1 |
| Gel time | min | 8.0-12.0 | GB/T7193.4.6 |
| Acid Value | mgKOH/g | 10.0-15.0 | GB/T2895 |
| Non-Volatile Content | % | 60.0-64.0 | GB/T7193.4.3 |
| Color (Harzen) | -- | ≤60 | 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 | % | 3.8 | GB/T2568 |
| Flexural Strength | MPa | 130 | GB/T2570 |
| Flexural Modulus | MPa | 3350 | GB/T2570 |
| Impack Resistance | KJ/M | 12.0 | GB/T1451 |
| HDT(1.80 MPa) | ºC | 87 | GB/T1634 |
| Barcol Hardness | --- | 46 | GB/T3854 |
| Water Absorption at 25ºC | % | 0.085 | 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



Changzhou RealLand Composite Material Technology Co., Ltd.
Choosing RealLand means gaining a strategic partner dedicated to your success. We go beyond supplying composite materials by offering a vertically-integrated system focused on three core pillars:
Uncompromising Consistency: Our stringent in-house manufacturing guarantees stable, batch-to-batch performance for all gel coats and vinyl ester resins, eliminating quality risks.
Global Supply Reliability: Our robust network ensures timely, localized delivery and seamless support, keeping your production lines running without geographical limits.
Deep Customization: Leveraging strong R&D, we provide tailored formulations to solve your specific technical challenges.
With RealLand, you get high-performance products backed by global delivery assurance and a partner committed to creating long-term value.





Q: Can I Request a Sample of Unsaturated Polyester Resin?
A: Yes, we can provide 10kg of resin as a free sample.
Q: Do you have OEM/ODM service?
A: Yes, we are highly flexible in offering OEM/ODM services.
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 is The Product Lead Time?
A: 10 days.
Q: What's Shelf Life of Unsaturated Polyester Resin?
A: Normally 8 months.
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 Your Company's International Transportation Form?
A: For samples, we offer Delivery Duty Paid (DDP) services for most of the countries. This means that we handle the delivery process, including the payment of taxes, and you won't be required to manage customs clearance. For bulk orders, we normally transported by sea or land. Our commitment is to ensure the secure and efficient delivery of our products to your specified destination.

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