Solving Problems with Chemicals

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LOCTITE 290 : Seals hair-line cracks effectively


LOCTITE 290 ( 23406 ) is designed for the locking and sealing of   threaded fasteners. Because of its low viscosity and capillary action, the product wicks between engaged threads and eliminates the need to disassemble prior to application. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. The product can also fill  porosity in welds, castings and powdered metal parts.
 
Besides, Loctite 290 is found to be a wonderful product for  sealing hair-line cracks in metal parts, gearboxes, pump casings, etc.
 
We had solved a leaking problem found in a pump housing. Below is the application case history.
 
 


A hair-line crack caused a leak and the media ( oil ) caused a mess to the working area and loss to the factory owner. The owner had called us for a solution.  Welding had not been considered due to previous experience of failure.


The area to be treated was power-abraded to the base metal.  It was later cleaned with LOCTITE  ODC Free Cleaner.  
 





Loctite 290 was applied directly onto the crack line. Due to its nature of low viscosity and high polarity, the green liquid seeped automatically into the tiny crack by capillary action and cured after 24 hours. It was then put back to operation and run without fail.


Tips & Tricks :   The sealing can be strengthened by applying a layer of Loctite Brushable Ceramic onto the inner surface and outer surface of  the cracks.





A layer of brushable ceramic was coated in the inner pump casing surface




Greyish layer of brushable ceramic provides extra protection against corrosion from process fluid


For application guides and product ordering information, kindly email :  aerochemisb@gmail.com  , or,  cheongfy01@gmail.com