Applications

Devcon® Devweld™ 531

Brand: Devcon®

Package Sizes:

  • 50 mL Cartridge

Shelf Life:

  • 12 months

Product Description:

Devcon® Devweld™ 531 is a two-part, 1:1 methacrylate adhesive designed for structural bonding of thermoplastics, metals, and composite assemblies. It provides high strength and stiffness while effectively adhering to difficult-to-bond materials. This adhesive requires no surface preparation, cures at room temperature, and offers excellent resistance to weathering and humidity.


Key Features:

No Surface Preparation: Bonds metals and plastics without primers.
High Strength & Toughness: Excellent shear, peel, and impact resistance.
Gap-Filling Properties: Bonds gaps up to 4 mm.
Durability: Weather and humidity resistant for long-term performance.
Non-Sagging Formula: Allows for easy vertical applications.


Recommended Applications:

🔹 Automotive & Transportation: Bonding metal and plastic parts in vehicle manufacturing.
🔹 Industrial Manufacturing: Used for assembling composite and thermoplastic structures.
🔹 Marine & Outdoor Applications: Withstands moisture and environmental exposure.
🔹 Plastic & Composite Bonding: Ideal for PVC, ABS, acrylics, fiberglass, and engineered plastics.

Typical Uncured Physical Properties:

Property Part A (Adhesive) Part B (Activator)
Color Off-White Yellow
Viscosity (cP) 40,000 – 60,000 40,000 – 60,000
Mix Ratio (by volume & weight) 1:1 1:1
Density (g/cc) 1.03 0.97
Mixed Density (g/cc) 1.00
Flash Point (°C) 9 9

Cure Profile at 23°C (73°F):

Property Time
Working Time 15 – 18 min
Fixture Time 30 – 35 min
Full Cure 24 hours

Typical Cured Physical Properties:

Property Value Standard Test
Tensile Strength (MPa) 27 – 31 ASTM D638
Lap Shear Strength (MPa) 20 – 24 ASTM D1002
Elongation at Break (%) 5 – 15 ASTM D638
Modulus (MPa) 1034 – 1206 ASTM D638
Gap Fill (mm) 1 – 4
Service Temperature (°C) -55 to 121

Chemical Resistance:

Chemical Type Resistance
Hydrocarbons Excellent
Acids & Bases (pH 3-10) Very Good
Salt Solutions Excellent
Polar Solvents & Strong Acids/Bases Poor

Substrate Compatibility:

Plastics: PVC, ABS, Acrylics (PMMA), PET, Vinyl Esters, PBT, Epoxy, Gelcoats
Metals: Aluminum, Stainless Steel, Carbon Steel, Coated Metals (E-Coat)
Composites: Fiberglass, Phenolics, Polysulfone

Note: For aluminum and stainless steel, it is recommended to use Metal Prep 90 primer for enhanced bonding​.

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