Loctite relaunches retaining adhesives with improved performance

Loctite retaining adhesives provide 100 percent contact over the entire bond surface, allowing stress to be distributed evenly over the joint which, in turn, enables higher loads to be carried.  


The bond also prevents moisture from entering the joint and eliminates fretting that commonly leads to corrosion, accelerated wear and premature failure.

These products are also beneficial when used in combination with shrink or press fit assemblies. Higher load transmission and performance can be achieved with existing designs and geometries. Alternatively, they allow a similar level of performance to be maintained by lower interference or lighter constructions.

The original Loctite 638 was only suitable for operating temperatures between -55?C to +150?C.  The latest generation version boosts the maximum temperature to 180?C and tests confirm that it also has superior heat ageing properties than its forerunner.

Loctite 648 now offers significantly higher temperature resistance at 180?C and can even be used effectively at service temperatures of 200?C.  

Both new products will also cure effectively even if the mating surfaces are not perfectly cleaned. They will tolerate light contamination of oils, cutting and cleaning fluids commonly found in the factory environment.  

These improvements have been achieved without compromising any of the key properties such as cure speed and bond strength.


Both products carry WRAS approval for the UK water industry and are currently undergoing certification from DVGW and NSF.