Products + Tools

Master Bond has launched a two component, low viscosity epoxy system for bonding, sealing, coating, and encapsulation. The Master Bond EP21LVFL also combines good flexibility with a solid strength profile. 

It is curable at room temperature, with a long working life of 120–160 minutes at 75°F (23.9°C) for a 100g batch. The new adhesive also features a flowable initial mixed viscosity of 10,000 cps – 14,000 cps. This epoxy also generates low exotherm making it suitable not only for bonding and coating, but also for sealing and potting applications. 

Especially useful in bonding substrates with different coefficients of expansion, such as metals, composites, glass, ceramics, rubbers and plastics, EP21LVFL also has a high elongation of 120% – 150%, a low tensile modulus of 1,500 psi – 2,500 psi, and a shore D hardness of 40 – 50. The product offers excellent electrical insulation properties with a volume resistivity exceeding 1,015 ohm-cm and a dielectric constant of 2.95 at 60 Hz. It also has a tensile strength of 1,200 psi – 1,400 psi and a lap shear strength measuring 900 psi – 1,100 psi.

The two part epoxy is capable of withstanding rigorous thermal cycling, vibration, mechanical stress and shock, and offers a non-critical, one-to-two mix ratio, by weight or volume. Its Part A is clear and Part B is amber clear. EP21LVFL cures more rapidly at elevated temperatures. Optimal performance properties can be achieved by curing overnight at room temperature followed by 4 – 6 hours at 125°F – 150°F (51.7°C – 65.6°C). 

The product is available in a variety of packing options, including half pint, pint, quart, gallon and five gallon kits, as well as in premixed and frozen syringes and dual cartridges for gun dispensers. The new epoxy can also be formulated in different colours.