Chemically resistant, non-drip epoxy system 05 November 2021

Master Bond EP41S-5ND Black is a two part, NASA low outgassing rated epoxy, with outstanding chemical resistance to acids, bases, alcohols and fuels. Most significantly it will withstand liquid immersion to harsh chemicals such as methylene chloride, phenol (10%), and nitric acid (30%).

Containing no solvents, this system cures at room temperature or more rapidly at elevated temperatures. It provides a high glass transition temperature of 140°C to 150°C, and exceptional electrical insulation properties, with a volume resistivity greater than 1,014 ohm-cm.

“EP41S-5ND Black is designed for bonding and sealing applications, wherein a non-sag, paste like consistency is required,” says Rohit Ramnath, senior product engineer at Master Bond. “The optimum curing schedule is overnight at 23.8°C followed by 3 – 4 hours at 65.5°C – 93.3°C. In applications where long-term chemical resistance is critical, the importance of post curing with heat cannot be overstated.”

EP41S-5ND Black has a good physical strength profile with a tensile strength measuring between 10,000 psi and 12,000 psi, and a tensile lap shear of 900 psi – 1,100 psi, both at room temperature. It is serviceable over the temperature range of -62.2°C to +232.2°C. This compound adheres well to a variety of substrates such as metals, composites, glass, ceramics and many plastics and rubbers. As indicated by the product name, its colour is black and it is RoHS compliant. Packaging is available in ½ pint kits, pint kits, quart kits and gallon kits.   

Deputy Editor

Claire Aldridge Deputy Editor t: +44 (0) 1727 743 889

Biog

Having spent a decade in the fastener industry experiencing every facet – from steel mills, fastener manufacturers, wholesalers, distributors, as well as machinery builders and plating + coating companies, Claire has developed an in-depth knowledge of all things fasteners.

Alongside visiting numerous companies, exhibitions and conferences around the world, Claire has also interviewed high profile figures – focusing on key topics impacting the sector and making sure readers stay up to date with the latest developments within the industry.