3M™ Scotch-Weld™ Polyurethane-reactive (PUR) Adhesives deliver structural adhesive strength alongside the curing speed of a hot melt.
PUR Adhesives

Three features to love: one-part application, rapid handling strength and high final strength.

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The strength of a structural adhesive with the speed of a hot melt

  • Polyurethane reactive adhesives (PUR adhesives; also called reactive hot melts, reactive polyurethanes or RPU adhesives) are one-part formulations that combine the initial speed of a hot melt adhesive with the strength of a structural adhesive. The bond forms in two stages: when the adhesive cools back down and solidifies like a hot melt it reaches holding strength, then the moisture-curing reaction proceeds over the next 24-48 hours to reach final structural strength. These adhesives are resistant to temperature extremes and flexible to provide vibration and impact resistance.

    3M™ Scotch-Weld™ PUR Adhesives have a range of open times that can be adjusted to suit your process, and they have low to no Volatile Organic Compounds (VOCs). These adhesives bond well to metals, glass, ceramics, wood and some plastics such as polystyrene and polyacrylic. The combination of no-mix one-part application, rapid handling strength and high final strength makes PUR adhesives excellent candidates to help improve throughput and reduce processing time.


Key benefits of PUR adhesives
  • PUR adhesives provide strong structural bonds.
    Shear Strength

    After cooling, PUR adhesives use ambient moisture to continue curing for hours to days while increasing in strength

  • PUR adhesives can enhance your process efficiency.
    Process Efficiency

    Applied as a hot melt, PUR adhesives rapidly cool down to handling strength so they can be moved to the next station

  • PUR adhesives can bond dissimilar materials securely.
    Material Bonding

    PUR adhesives are excellent for bonding substrates such as wood or plastic to themselves or to glass or metal


Featured PUR Adhesive Products

Explore PUR Adhesive Products
  • With an extremely fast set time, TE100 can be used for adhering edge molding and trim for countertops, tables, shelving, desks, drawer bottoms, backs and facings—and almost any furniture or cabinetry job.

    • Effective across a wide range of temperatures and offers a 120-second open time for positioning, followed by 60 seconds to reach handling strength
    • Creates high-strength bonds that are plasticizer resistant
    • Professional grade adhesive for bonding wood and many plastics
    • Contains UV dye to easily inspect the bond line with a black light
    • Creates very thin bond lines (0.001" to 0.003") on wood
    • Designed for use with the 3M™ Scotch-Weld™ PUR Applicator and unique disposable nozzles

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  • 3M™ Scotch-Weld PUR Adhesive TS230 is ideal for woodworking, automotive interiors, appliances, electronics, and general assembly.

    • Requires little to no clamping or fixturing
    • 150-second set time for fast-paced processes and productivity
    • 4-minute open time for joining parts
    • Creates high-strength bonds that are plasticizer resistant
    • Professional grade adhesive for bonding a variety of materials, including composites, wood, plastics, glass and metal
    • Can be sprayed or roll-coated onto surfaces
    • Designed for use with the 3M™ Scotch-Weld™ PUR Applicator and unique disposable nozzles

    View product details


See 3M™ Scotch-Weld™ PUR Adhesives in Action

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