Crestomer® 1152PA
BONDING PASTE

Product info

Crestomer® 1152PA Structural Adhesive

Flexible Urethane Acrylate Structural Adhesive for High-Performance Composite Bonding

Crestomer® 1152PA is a market-leading, pre-accelerated two-part structural adhesive based on unsaturated urethane acrylate chemistry in a styrene monomer. Designed for demanding composite applications, it combines exceptional flexibility, high structural strength, and low exotherm cure behaviour to deliver durable bonds with minimal risk of print-through or surface distortion.

With over 100% elongation at break, Crestomer® 1152PA is a truly flexible structural adhesive, offering outstanding fatigue and impact resistance in service. Its highly thixotropic, non-sag formulation allows controlled application on vertical and complex joints, while reduced styrene emissions improve workplace conditions compared to traditional systems.

Key Features & Benefits

Urethane acrylate structural adhesive

Combines high strength with exceptional flexibility

Over 100% elongation at break

Absorbs movement, vibration, and impact without bond failure

Low exotherm during cure

Minimises print-through and surface distortion

Excellent fatigue & impact resistance

Ideal for dynamically loaded structures

Highly thixotropic, non-sagging formulation

Controlled application on vertical and overhead joints

Reduced styrene emissions

Improved handling and working environment

Easy to apply

Saves time and reduces assembly costs

Mechanical Properties (Cured)

(Laboratory tested)

Tensile Strength: ~22–25 MPa
Tensile Modulus: ~1000–1500 MPa
Tensile Elongation: ~100–120%
Hardness: ~65 Shore D
Water Absorption: ~0.36%

Typical Application Properties

Working Time: ~50 minutes
Fixture Time: ~10 hours
Gap Filling Capability: 1–25 mm (0.04–1.00 in)
Recommended Application Temperature: >15°C (18–25°C preferred)
Mix Ratio (by volume): 50:1
Specific Gravity: ~1.05
Shelf Life: 12 months (stored as recommended)

Substrate Compatibility

Crestomer® 1152PA provides strong, reliable adhesion to a wide range of substrates, including:

FRP / GRP laminates
Vinyl ester, polyester, and epoxy composites
Marine plywood
Core materials
Metals, including stainless steel and aluminium

Its versatility also makes it suitable for general-purpose structural bonding where flexibility and durability are required.

Applications

Crestomer® 1152PA is recommended for:

- Structural bonding of composite components
- Assembly of GRP mouldings
- Marine structures and internal components
- Diesel tanks and contour joints
- Bonding of “green” FRP
- Replacement of mechanical fixings in bonded joints

Processing & Application

Crestomer® 1152PA is supplied pre-accelerated and requires only the addition of a medium-reactivity MEKP catalyst.

Catalyst level: 2% MEKP (e.g. Butanox® M50)
Apply using spatula, trowel, or dispensing equipment
Maintain application temperatures above 15°C
Substrates should be clean, dry, and free from contamination
Light abrasion is recommended for aged laminates

Additional pigments or fillers are not recommended, as they may affect cure behaviour and adhesive performance.

Packaging & Storage

Packaging:
- 25 kg (55 lb) containers
- 200 kg (440 lb) containers
Storage:
Store between 2°C and 23°C (36–73°F) in original, unopened containers.
Protect from freezing and direct sunlight.

Certifications

Lloyd’s Register
RINA
DNV.GL
Class NK

ATL Technical Support
ATL Composites provides adhesive selection guidance, joint design advice, and processing support to ensure Crestomer® 1152PA delivers reliable, long-term structural performance in composite assemblies.

Crestomer® 1152PA Structural Adhesive

frequently asked questions

How does ATL tailor composite systems for different industries?

Every industry has distinct performance, compliance, and manufacturing requirements. ATL’s in-house chemists and engineers develop and refine epoxy systems, adhesives, and core materials to meet the specific demands of marine, defence, aerospace, automotive, industrial, civil, architectural, and sporting applications — ensuring every product delivers optimal strength, efficiency, and durability.

Can ATL customise materials for my project or process?

Yes. ATL offers custom formulation and process engineering support to align material performance with your production requirements — whether infusion, hand lay-up, lamination, bonding, or CNC-routed panel construction. Our technical team collaborates closely with customers to deliver precision-matched resin systems and structural solutions for unique applications.

Are ATL’s composite systems certified for high-performance applications?

Absolutely. ATL operates under an ISO 9001:2015-certified quality management system, with selected materials approved by DNV for use in structural and high-load applications. Every ATL system is manufactured to exacting standards of performance, consistency, and traceability to meet the demands of defence, industrial, and advanced engineering environments.

What makes ATL’s materials suitable for large-scale or structural builds?

ATL’s epoxy systems, structural panels, and composite cores are engineered for high strength-to-weight performance, dimensional stability, and fatigue resistance. These attributes make ATL materials ideal for large composite assemblies, modular structures, and precision-engineered components where long-term strength, weight reduction, and reliability are essential.

Does ATL offer sustainable or bio-based composite options?

Yes. ATL is committed to advancing sustainable composite technology, offering USDA-Certified Bio-Based epoxy systems and environmentally conscious materials that reduce waste, extend service life, and minimise environmental impact. Our ongoing R&D focuses on improving sustainability without compromising structural integrity or mechanical performance.

How can I select the right ATL system for my application?

Choosing the ideal composite system depends on your structure’s design, load requirements, manufacturing process, and environmental exposure. ATL’s in-house engineers and chemists provide tailored advice to ensure the correct combination of resin, core, adhesive, and surface technology for your project.
To discuss your application or request technical guidance, contact ATL’s Technical Team — we’ll help you identify the most effective and efficient composite solution for your build.

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