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RESIN SELECTION FOR FRP STRUCTURES I-Series® V-Series® AND P-Series®
Resin selection is central to how an FRP structure performs throughout its design life. This Tech Talk Tuesday session explains what resin is in a fibre-reinforced polymer system, how it works with the glass reinforcement, and why choosing the right resin is as critical as the coating system for a steel structure. The discussion walks through how different environments, such as coastal jetties, public infrastructure, mineral processing plants, wastewater facilities, tunnels and food processing sites place very different demands on FRP products, especially around chemical resistance, temperature, fire performance and durability. It then introduces Treadwell’s core resin families: I-Series® isophthalic polyester, V-Series® vinyl ester and P-Series® phenolic and explains where each is typically applied, how they behave under sustained high or low temperatures, and how cost tiers relate to performance expectations so that projects can be matched with a resin system that is genuinely fit for purpose.
Key Benefits
- Helps asset owners and designers understand why resin choice is as essential as structural design in achieving the intended service life for FRP walkways, platforms, jetties and access systems.
- Clarifies when intermediate chemical resistance is enough and when more aggressive environments demand higher performing systems such as vinyl ester or phenolic.
- Explains temperature and fire performance differences between I-Series®, V-Series® and P-Series®, including how sustained high and low temperatures affect strength and stiffness over time.
- Highlights how integrated fire retardants, UV stabilisers and colour support compliance with building and fire standards while reducing maintenance compared to coated systems.
- Emphasises the cost-performance trade-off, enabling specifiers to justify when a premium resin is worth the additional investment in demanding environments.
Applications
- Public infrastructure and coastal assets such as boardwalks, jetties and pedestrian access where resistance to salt water, rot and corrosion is required, typically using I-Series® in appropriate exposure conditions.
- Water and wastewater treatment plants where structures are exposed to H₂S and treatment chemicals, making V-Series® vinyl ester a strong candidate for long-term chemical resistance.
- Mining and mineral processing facilities where reagents, acidic or caustic solutions and elevated temperatures demand higher chemical resistance and temperature performance from V-Series®.
- Tunnels, offshore platforms and confined spaces where stringent fire performance, low smoke and low toxicity requirements point toward P-Series® phenolic systems.
- Food processing plants, ovens and blast freezers where FRP platforms and access systems must retain mechanical properties under continuous high or low temperatures, often favouring V-Series®.
Key Moments
- 00:17 "👋 Introduction to Tech Talk Tuesday, focusing on resin selection for FRP structures.
- 01:11 📋 Importance of resin selection: crucial for optimal performance of FRP products.
- 02:03 🛠️ Explanation of what resin is: essential component of fiber-reinforced polymer (FRP) products.
- 03:22 🎨 Resin selection compared to paint specifications for steel structures, affecting longevity and performance.
- 04:19 🌊 Environmental considerations for specifying resins include exposure to salt water and chemicals.
- 05:37 🔍 Importance of defining expected design life in relation to specific resin types.
- 07:24 🧪 I-Series® resin overview: suitable for potable water storage and resistant to rot and corrosion.
- 10:31 🥽 V-Series® resin offers better chemical resistance and is suited for wastewater treatment and harsh environments.
- 11:52 🔥 P-Series® resin is ideal for high heat and low smoke applications, especially in tunnels and offshore facilities.
- 13:15 💰 Cost comparison of resin types: I-Series®, V-Series®, and P-Series®, influencing overall project budgeting.
- 15:58 🌡️ Discussion on temperature impact on resin performance, emphasizing the need for specific resin selection based on sustained temperatures.
- 17:20 📆 Design life expectations vary based on proper resin type for specific applications.
- 19:02 ☀️ Discussion on the effects of direct sun exposure on FRP and its thermal properties.
- 21:40 📊 Request for feedback on the session and suggestions for future topics from attendees."
Why Choose Treadwell Group for FRP Resin & Solutions
Treadwell develops and supplies FRP systems in which resin selection is tailored to the application, environment, and desired design life, rather than taking a one-size-fits-all approach. By offering structured resin families I-Series®, V-Series® and P-Series®, backed by chemical resistance data, fire testing and temperature performance information, Treadwell helps specifiers align exposure conditions with the right resin system from day one. This approach supports safer, longer-lasting, and lower-maintenance FRP infrastructure across public, industrial, and specialised environments, while providing project-specific guidance when conditions are complex or critical. Why Treadwell?
