FIBREGLASS RESIN SYSTEMS

Epoxy Resin Systems

Epoxy Resin Systems

High Performance

Premium epoxy resin systems for structural bonding, laminating, coating and high strength composite applications.

Best For
Bonding, laminating, structural repairs
Known For
Strength, adhesion, durability

Common Uses

  • Composite laminating
  • Structural bonding
  • Timber coating
  • Marine repair work

Why Choose It

  • Excellent adhesion
  • High mechanical strength
  • Suitable for demanding applications
  • Versatile performance
Gelcoats and Flowcoats

Gelcoats & Flowcoats

Surface Finish

Gelcoats and flowcoats for fibreglass finishing, repairs and protective surface layers with strong visual and protective performance.

Best For
Surface finishing, repairs, coating
Known For
Gloss, protection, finish quality

Common Uses

  • Boat repairs
  • Fibreglass finishing
  • Mould surfaces
  • Protective top layers

Why Choose It

  • Creates a finished surface
  • Improves appearance
  • Adds protective barrier
  • Ideal for restoration work
Polyester Resin Systems

Polyester Resin Systems

Cost Effective

Polyester resin systems for general fibreglass laminating, repairs and composite fabrication where value and speed matter.

Best For
General laminating, repairs, fabrication
Known For
Affordability, fast cure, versatility

Common Uses

  • Fibreglass layup
  • Boat repairs
  • General composites
  • Moulding work

Why Choose It

  • Economical option
  • Widely used in fibreglass work
  • Fast turnaround potential
  • Good general purpose choice
Vinyl Ester Resin Systems

Vinyl Ester Resin Systems

Premium Marine

Vinyl ester resin systems for higher performance laminates, improved corrosion resistance and demanding composite applications.

Best For
Marine laminates, corrosion resistance, demanding builds
Known For
Durability, chemical resistance, strength

Common Uses

  • Boat building
  • High performance laminates
  • Chemical resistant structures
  • Advanced fibreglass repair

Why Choose It

  • Higher corrosion resistance
  • Excellent mechanical properties
  • Ideal for premium applications
  • Strong marine performance
Coosa Bluewater 20 Composite Board
Structural Replacement Board

Coosa Board

Coosa Bluewater composite board is a high performance marine panel made from closed cell polyurethane foam reinforced with fibreglass. It is designed as a lightweight structural replacement for plywood in marine and high moisture environments.

Custom CNC Available

Divinycell PL100 PET Structural Foam Core
Lightweight Structural Core

Divinycell PET Core

Divinycell PET structural foam core is designed for composite sandwich construction where low weight, strong performance and precision CNC cutting are important. It is suited to marine, transport and industrial composite applications.

CNC Core Cutting Available

Don’t Forget These Essentials

Most fibreglass jobs require more than just resin. Make sure you have the right catalyst, reinforcement materials, fillers and application tools to complete your laminating or repair work properly.

Curing

Catalysts & Hardeners

Required to properly cure polyester, vinyl ester and epoxy resin systems.

  • MEKP catalysts
  • Epoxy hardeners
  • Catalyst dispensers
Shop Catalysts
Reinforcement

Fibreglass Mat & Reinforcements

Reinforcement fibres provide the structural strength in composite laminates.

  • Chopped strand mat
  • Woven cloth
  • Composite fabrics
Shop Reinforcements
Modify Resin

Fibreglass Fillers & Additives

Fillers and additives help modify viscosity, strength and finishing performance in resin systems.

  • Q-Cell microspheres
  • Talc fillers
  • Wax and styrene additives
Shop Fillers
Application

Fibreglass Tools & Accessories

Application tools help ensure clean laminating, mixing and reinforcement handling.

  • Laminating rollers
  • Mixing cups
  • Brushes and spreaders
Shop Tools

New to Fibreglass?

Start with the right guide for your project. Learn how fibreglass resin systems, laminating techniques and core materials work together for repairs, fabrication and composite builds.

Resin Systems

Fibreglass Resin Guide

Understand the differences between polyester, epoxy and vinyl ester resin systems and when each one is best suited to laminating, repairs and composite fabrication.

Best For
Choosing the right resin system
Covers
Polyester, epoxy and vinyl ester

You’ll Learn

  • How resin systems differ
  • Which resin suits which job
  • Performance vs cost tradeoffs
  • Common fibreglass resin applications
Laminating

Fibreglass Laminating Guide

Learn how fibreglass laminating works, including how resin, catalysts and reinforcement materials combine to create strong composite structures and repair systems.

Best For
Learning the laminating process
Covers
Resin, catalyst and reinforcement basics

You’ll Learn

  • How laminating systems work
  • The role of catalyst and resin
  • How reinforcements are used
  • Basic composite fabrication principles
Materials

Fibreglass Materials Guide

Explore the main materials used in fibreglass fabrication and repair, from resins and fillers through to reinforcement fabrics and supporting composite products.

Best For
Understanding product categories
Covers
Materials used in repair and fabrication

You’ll Learn

  • Core fibreglass material types
  • What each material does
  • How products work together
  • Where each material fits in a system

Fibreglass Resins, Gelcoats and Composite Materials

Fibreglass composite systems combine resin and reinforcement materials to create strong, lightweight structures suitable for marine, industrial and construction applications.

Polyester, epoxy and vinyl ester resins are commonly used depending on the strength, chemical resistance and curing characteristics required. These resins are typically combined with fibreglass mat or woven reinforcement to form durable composite laminates.

Fibreglass laminating systems also include catalysts, fillers and application tools used to prepare surfaces, saturate reinforcement fibres and ensure proper curing of the composite structure.

These materials are widely used in boat repair, mould making, automotive fabrication, waterproofing systems and structural reinforcement projects.

Frequently Asked Questions

How do I calculate the correct catalyst ratio for fibreglass resin?
Catalyst ratios for polyester and vinyl ester resin are typically between 1% and 2% MEKP by weight. The exact ratio depends on temperature, resin type and desired working time. Warmer conditions usually require lower catalyst percentages, while cooler environments may require slightly higher ratios. Using a catalyst ratio calculator can help estimate the correct amount of MEKP for a given resin quantity.
How much fibreglass mat or cloth do I need for a repair?
The amount of fibreglass reinforcement required depends on the surface area being repaired, the weight of the material (GSM) and the number of laminate layers. Most fibreglass reinforcement is supplied on rolls approximately 1.27 metres wide, so calculating the required linear metres from the roll can help estimate how much material is needed for the job.
How much resin is required for fibreglass laminating?
Resin consumption varies depending on the reinforcement type and laminating method. In many hand lay-up applications the resin-to-glass ratio is approximately 1:1 by weight, meaning roughly equal amounts of resin and reinforcement are used. Additional resin may be required to account for surface preparation, waste and overlapping laminate layers.
What happens if too much catalyst is added to fibreglass resin?
Adding too much MEKP catalyst can cause the resin to cure too quickly and generate excessive heat during the chemical reaction. This may lead to brittle laminates, surface defects or even resin cracking. Following the recommended catalyst ratios and mixing guidelines provided by the resin manufacturer helps ensure consistent curing and laminate strength.