General Purpose Unwaxed Polyester Resin 252-60

General Purpose Unwaxed Polyester Resin for Fibreglass Laminating & Composite Applications

CDR 252-60 GP Unwaxed Polyester Resin is a general purpose laminating resin designed for fibreglass applications where strong interlaminar bonding and consistent laminate build-up are required.
As an unwaxed resin, it remains tacky after curing, allowing additional laminate layers to chemically bond without sanding between coats. This makes it ideal for multi-layer laminating, repairs, and structural composite work.

Formulated for use with MEKP catalyst, CDR 252-60 provides reliable curing performance and effective wet-out of reinforcement materials including chopped strand mat, woven fibreglass fabrics, and biaxial cloth. Suitable for hand lay-up and general laminating processes across marine, automotive, industrial, and composite manufacturing applications.

Features & Benefits

Key Features

• General purpose unwaxed polyester resin
• Designed for fibreglass laminating applications
• Remains tacky after cure for interlayer bonding
• Compatible with chopped strand mat and fibreglass fabrics
• Requires MEKP catalyst for curing
• Suitable for hand lay-up processes

Key Benefits

• Allows strong chemical bonding between laminate layers
• Eliminates the need for sanding between coats
• Provides consistent laminate strength and build-up
• Easy to use for repairs and production work
• Reliable curing performance when correctly catalysed
• Suitable for a wide range of fibreglass applications

Technical Specs

• Product Type: Unwaxed polyester laminating resin
• Resin Type: General purpose polyester resin
• Catalyst Required: MEKP catalyst
• Application Method: Hand lay-up laminating
• Compatibility: Chopped strand mat, woven cloth, biaxial fabrics
• Finish: Tacky surface for interlayer bonding

How It Works

• Mixed with MEKP catalyst to initiate curing
• Remains tacky after cure due to absence of wax
• Allows additional laminate layers to chemically bond without sanding
• Builds into a strong composite laminate through multiple layers

Key Applications

• Fibreglass laminating and structural build-up
• Boat building and marine repairs
• Automotive fibreglass repairs and fabrication
• Composite manufacturing and moulding
• Tank, pipe, and industrial fibreglass work
• General purpose laminating applications

CDR 252-60 GP Unwaxed Polyester Resin FAQs

Q1: What is CDR 252-60 GP Unwaxed Polyester Resin used for?
A: CDR 252-60 GP Unwaxed Polyester Resin is used for fibreglass laminating applications where multiple layers are required to chemically bond together.

Q2: Why does CDR 252-60 GP Unwaxed Polyester Resin remain tacky after curing?
A: CDR 252-60 GP Unwaxed Polyester Resin does not contain wax, allowing the surface to remain reactive for interlayer bonding.

Q3: Do I need to sand between laminate layers when using CDR 252-60 GP Unwaxed Polyester Resin?
A: No, CDR 252-60 GP Unwaxed Polyester Resin allows chemical bonding between layers without sanding.

Q4: What catalyst is required for CDR 252-60 GP Unwaxed Polyester Resin?
A: CDR 252-60 GP Unwaxed Polyester Resin requires MEKP catalyst for curing.

Q5: Can CDR 252-60 GP Unwaxed Polyester Resin be used as a final surface coat?
A: CDR 252-60 GP Unwaxed Polyester Resin is generally used for intermediate laminate layers, with waxed resin or flowcoat recommended for the final surface.

Q6: What reinforcement materials are compatible with CDR 252-60 GP Unwaxed Polyester Resin?
A: CDR 252-60 GP Unwaxed Polyester Resin is compatible with chopped strand mat, woven fibreglass cloth, and biaxial fabrics.