Overview
ZC-25 Unsaturated Polyester Resin is a pre-promoted resin with a long gel time. As one of the recommended international brand products in our resin range, ZC-25 Unsaturated Polyester Resin is supplied with supply chain resource support for formulators sourcing a resin for vacuum infusion and RTM molding processes.
Benefits and Application
ZC-25 resin has low viscosity, good infiltration of glass fiber, fast solidification and air dryness. Suitable for vacuum diversion and RTM molding process, and used to manufacture products such as FRP fishing boats, automotive components, fan warehouse cover and waterproof board.
Liquid Resin Typical Properties
| Property | Value | Unit | TM |
| Appearance | Light yellow transparent viscous liquid | – | – |
| Acid Value | 14-20 | mgKOH/g | GB/T 2895-2008 |
| Viscosity, 25℃ | 0.14-0.16 | Pa.s | GB/T 7193-2008 |
| Solid Content | 52-58 | % | GB/T 7193-2008 |
| Gel time | 25-38 | min | GB/T 7193-2008 |
Why ZC-25 Unsaturated Polyester Resin Matters for Vacuum Infusion and RTM
Low viscosity and good glass fiber wet-out are two of the most important properties formulators look for when qualifying a resin for vacuum infusion and RTM molding, since poor fiber infiltration can lead to dry spots and voids in the finished laminate. With a viscosity of 0.14 to 0.16 Pa.s at 25℃, this resin is positioned to flow through fiber reinforcement efficiently during closed mold processing.
Because this resin is pre-promoted with a gel time of 25 to 38 minutes, formulators have a workable window for large or complex mold filling before the resin begins to cure, which is relevant for parts such as FRP fishing boats and automotive components that require longer infusion times.
What to Consider When Sourcing ZC-25 Unsaturated Polyester Resin
When sourcing an unsaturated polyester resin for vacuum infusion or RTM molding, formulators typically evaluate viscosity, gel time, acid value, and solid content, alongside consistent batch-to-batch quality. Working with a supplier that can provide current documentation and responsive technical support can help reduce qualification time when approving a new resin for a production line.
Because optimal catalyst dosage and process temperature affect gel time and final cure, formulators should run small-batch trials before finalizing a process for full-scale production of FRP fishing boats, automotive components, fan warehouse covers, or waterproof board.
General Handling and Storage Guidance
As with most unsaturated polyester resins, this product should be kept in its original, tightly sealed container, stored in a cool, dry location away from direct sunlight and heat sources, and used within the manufacturer’s recommended shelf life.
Shelf life and specific storage recommendations vary by batch and packaging format, so formulators should always confirm current shelf life, recommended storage conditions, and any handling precautions against the latest technical data sheet and SDS for the specific batch of ZC-25 Unsaturated Polyester Resin they are working with.
Where to Source This Product
Thousands Chemicals connects formulators with ZC-25 Unsaturated Polyester Resin and related resin products through our digital B2B marketplace. Unsaturated polyester resin properties such as gel time and viscosity are commonly evaluated using test methods published by organizations such as ASTM International. Our team can help confirm packaging, lead times, and technical documentation for your target application and order volume.
Documentation We Can Provide
For buyers evaluating this resin for a new vacuum infusion or RTM molding formulation, our team can help arrange the current technical data sheet and safety data sheet. Having this documentation in hand before finalizing a formulation can help avoid delays later in your qualification or approval process.
FAQ
What is ZC-25 Unsaturated Polyester Resin used for?
It is used to manufacture products such as FRP fishing boats, automotive components, fan warehouse covers, and waterproof board, using vacuum diversion and RTM molding processes.
What is the gel time of ZC-25 Unsaturated Polyester Resin?
The gel time is 25 to 38 minutes, with a viscosity of 0.14 to 0.16 Pa.s at 25℃.
Is this resin suitable for vacuum infusion?
Yes, it has low viscosity and good infiltration of glass fiber, making it suitable for vacuum diversion and RTM molding processes.
Can you provide technical documentation and bulk pricing?
Yes, technical data sheets and SDS documentation are available on request, and our team can provide bulk pricing and lead times based on your target volume and delivery location.
Get a Quote for ZC-25 Unsaturated Polyester Resin
Contact our team for a quote, technical data sheet, or SDS for this pre-promoted resin. We support bulk supply and global shipping for formulators sourcing ZC-25 Unsaturated Polyester Resin for vacuum infusion, RTM molding, and FRP fabrication applications.
