Henkel has improved the formulations of two of its most popular threadlocking adhesives. Medium strength Loctite 243 and high strength Loctite 270 are now more oil tolerant than previous grades, enabling them to be used more readily on ‘as received’ parts – including those contaminated with engine oils, corrosion prevention oils and cutting fluids. Their temperature resistance has also been increased to 180°C and the adhesives will cure not only on active substrates, such as iron, copper, brass and steel, but also on passive materials including stainless steel, aluminium, nickel and zinc plated surfaces and chrome-free, inorganic and organic coatings.