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3M™ Scotch-Weld™ Urethane Adhesive 3549

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  • Two-part urethane delivers extremely tough, flexible bonds
  • Designed for vertical and other applications that require no slumping or sagging of the adhesive bead
  • Flexible adhesive that is capable of bonding dissimilar substrates
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Specifications
Adhesive Type
Urethane
Applications
Encapsulating, Impact resistant, Mounting and Trim Attachment, Panel to Frame/Stiffner to Panel Assembly, Potting, Sealing, Sealing, Potting and Encapsulating, Small Joint Assembly, Structural Bonding, Vibration resistant
Brand
Scotch-Weld™
Colour
Brown
Consumer Label
No
Design Challenges
Impact & Shock Absorption, Noise Vibration & Harshness Control NVH
Full Cure
7 Days @ 72 F (22 C)
Indoor/Outdoor
Both
Industries
Construction, General Industrial, Metalworking, Military and Government, MRO, Signage, Specialty Vehicle, Woodworking
Maximum Operating Temperature (Celsius)
79 Degree Celsius
Maximum Operating Temperature (Fahrenheit)
175 Degree Fahrenheit
Mix Ratio Volume Base:Accelerator
1 : 1
Open Time
60 minutes @ 72 F (22 C)
Physical Form
Paste
Position
Better
Product Form
Kit
Product Type
Urethane Adhesive
Set Time
>25 Minutes
Shear Strength at 72 Degrees F (22 Degrees C)
2000 Pound-Force Per Square Inch
Shelf Life in Months (from date of manufacture)
12
Specific Gravity
1.23, 1.29
Storage Temperature
72 Degree Fahrenheit, 72 F (22 C)
Substrate
Elastomers, HSE Plastics and Glass, Metal, Metal (Unpainted), Paint, Paints (Powder Coat, Painted Metal, Composite Panel), Plastics: HSE, MSE (ABS, Acrylic, Polycaronate, Nylon), Rough surfaces, Rubber, Wood
Substrate 1
EPDM Rubber, Glass, Glass & Ceramics, Metal, Paint, Plastic, Easy-to-Bond (HSE), Plastics (ABS, PVC, Acrylic), Plastics (High Performance Nylon), Rough Surfaces, Rubber (Except EPDM), Wood & Hardboard
Substrate 2
Elastomers, HSE Plastics and Glass, Metal, Metal (Unpainted), Paint, Paints (Powder Coat, Painted Metal, Composite Panel), Plastics: HSE, MSE (ABS, Acrylic, Polycaronate, Nylon), Rough surfaces, Rubber (EPDM, TPV), Wood
Units per Case
6
Viscosity
Non-Sag
Viscosity Range (cps) at Room Temperature
10,000-100,000
Volume
1 Liquid Quart(US), 2 Fluid Ounce (US)
Volume (metric)
60 Millilitre, 950 Millilitre
Work Time
40 Minutes
Details
  • Two-part urethane delivers extremely tough, flexible bonds
  • Designed for vertical and other applications that require no slumping or sagging of the adhesive bead
  • Flexible adhesive that is capable of bonding dissimilar substrates

3M™ Scotch-Weld™ Urethane Adhesive 3549 is a brown, non-sag, two-component polyurethane adhesive. This urethane adhesive has a 60 minute work life for panel bonding or repositioning. Ideal for bonding dissimilar substrates, such as composites, SMC, FRP, many plastics, ceramic, wood, rubber, and metal.

Compared to one part sealants, 3M™ Scotch-Weld™ Urethane Adhesive 3549 is fast-curing, establishes tough bonds and offers low-temperature flexibility. 3M™ Scotch-Weld™ Urethane Adhesive 3549 becomes a non-sag paste upon mixing for accurate and precise handling during application. This adhesive can be used for bonding dissimilar substrates, such as concrete, ceramic, wood, plastic, rubber, and metal. With a 1:1 mix ratio, this urethane adhesive has a 60-minute work life, reaches handing strength in 8 hours and full cure in 7 days. Two-part urethane adhesives cure chemically, rather than relying on moisture from the air. Urethane adhesives will bond most common materials such as wood, metals, rubbers, leather, tile, glass, many plastics, concrete and more. The versatility of urethane adhesives is exhibited in the different formulations that have varying cured properties such as different levels of stiffness or flexibility, open time and cure speed, and hardness. They can cure to a relatively rigid or highly flexible state to meet a wide range of requirements. In either finished state, urethane adhesives will maintain bond strength integrity through variable environmental factors such as temperature, moisture, and chemical exposure.

Suggested Applications

  • Flexible plastic or composite bonding
  • Bonding composite panels to frames for transportation applications
  • Bonding wood, metal, or composite door frames to wood or other surfaces
  • Bonding wood paneling to wood or plaster
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