FRP sandwich panels combine a durable FRP gelcoat skin with an insulating core. Choosing the right FRP sandwich panel cores depends on the specific demands of your project — not all cores are built the same.
PU (Polyurethane) Core PU core offers the best thermal insulation performance among common core options, with standard density of 40–45 kg/m³ and a high-strength variant at 48–50 kg/m³. It is the preferred choice for applications where insulation efficiency is the top priority, such as refrigerated truck bodies and cold chain logistics.
PET Core PET core is a lightweight, recyclable option suited to applications where sustainability and weight reduction are priorities, offering good structural support alongside moderate insulation.
Honeycomb Core Honeycomb core prioritizes strength-to-weight ratio over thermal insulation, making it well suited for structural panel applications such as modular building walls and equipment enclosures where rigidity matters more than R-value.
Plywood Core Plywood core provides strong mechanical support and is often selected for flooring, structural partitions, and applications requiring high load-bearing capacity.
Which FRP Sandwich Panel Cores Are Right for You?
The core material you choose affects everything from thermal performance and weight to structural rigidity and long-term durability, making it one of the most important decisions in specifying an FRP sandwich panel for your application.
For cold chain and refrigerated transport applications, PU core is generally the top recommendation for maximum insulation, with XPS core as a cost-effective alternative. For structural or load-bearing applications, Honeycomb or Plywood core are typically better suited.
Explore each core option in detail on our FRP Sandwich Panels product pages, or contact our team to discuss which core material fits your project.
