Innovative A-K540 Structural Adhesive Bonds Low Surface Energy Plastics

February 2015

In response to strong demand from customers regarding their need for a fast-curing structural adhesive capable of providing robust direct adhesion to low surface energy plastics, L&L Products is pleased to announce the launch of a new, innovative material as part of the L&L Bond A-K Series of room temperature cure structural adhesives.

Designated L&L Bond A-K540, this innovative structural adhesive is unique in that it combines direct adhesion – without primers or plasma, corona, flame treatment – to low energy substrates such as polypropylene and polyethylene thermoplastics with very fast cure speeds at room temperature. A-K540 is also capable of bonding a multitude of other substrates, enabling combinations of polyolefin plastics with metal and composite substrates.

See chart below, which demonstrates the lap shear strength of A-K540 on various low energy substrates:

A-K540 Lap Shear Results_EN

L&L Bond A-K540 is specially formulated for structural bonding of PP interior trim, including dashboards, door panels and center consoles. Other key applications include structural assembly of talc filled PP / TPO bumper modules, and structural modules incorporating GMT or LGFPP. Similar to the rest of the A-K series adhesives, A-K540 cures completely at room temperature. A-K540 is easy to use and is supplied in either 50ml or 400ml cartridges, pails (19 L), or drums (190 L).

Key Product Attributes:

  • Excellent adhesion to polypropylene and to polyethylene thermoplastics with no surface preparation
  • Ease of application with fast room temperature curing characteristics
  • High tensile strength and impact resistance
  • Robust long term durability for applications in challenging operating conditions

To learn more about A-K540, please email: