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Y-12 National Security Complex

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PDF Document PublicationRonJohn Fact Sheet (463 KB)

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Effect of RonJohn on Halthane 88/Asilamine polyurethane coating.

Effect of RonJohn on Halthane 88/Asilamine polyurethane coating.

Technology Marketing Summary

RonJohn, a urethane and coating remover, was developed to replace hazardous or flammable solvents such as methylene chloride, acetone, toluene, xylene, and methanol. RonJohn not only improves safety but is also more effective than many other solvents used to strip paint and remove adhesives, producing a cleaner surface in less time.


RonJohn rapidly dissolves many polymers and urethane adhesives. It also removes epoxy polyamide coatings, powder coatings, and char from thermally decomposed polymers. RonJohn has a high flash point of 145 degrees Fahrenheit, making it combustible not flammable. It also evaporates slowly, allowing long residence time in contact with material being stripped. Finally, it has a health, fire, reactivity rating of 2,2,0, the same rating as kerosene.

  • Reduces health risks; eliminates CERCLA, RCRA, and HAP hazards
  • Improves safety; combustible, not flammable
  • Saves time; rapidly softens, gels, and dissolves polyurethanes
  • Lowers disposal costs; does not require hazardous material disposal
  • Improves removal results; cleaner, more complete removal of coatings
Applications and Industries
  • Paint stripping
  • Adhesive, powder coat and wax buildup removal
  • Urethane-foam potting machine cleaning
  • Refurbishment and restoration
  • Hobbyists
  • Industrial Cleaning
More Information

TRL 9 - Actual application of the technology in its final form and in Y-12 production use.

2011 R&D 100 Award

Technology Ventures Corporation-featured technology, 2011

Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Patent 7,767,637
Solvent for urethane adhesives and coatings and method of use
A solvent for urethane adhesives and coatings, the solvent having a carbaldehyde and a cyclic amide as constituents. In some embodiments the solvent consists only of miscible constituents. In some embodiments the carbaldehyde is benzaldehyde and in some embodiments the cyclic amide is N-methylpyrrolidone (M-pyrole). An extender may be added to the solvent. In some embodiments the extender is miscible with the other ingredients, and in some embodiments the extender is non-aqueous. For example, the extender may include isopropanol, ethanol, tetrahydro furfuryl alcohol, benzyl alcohol, Gamma-butyrolactone or a caprolactone. In some embodiments a carbaldehyde and a cyclic amide are heated and used to separate a urethane bonded to a component.
Y-12 National Security Complex 08/03/2010
Technology Status
Development StageAvailabilityPublishedLast Updated

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