The protective sealing impregnant of this invention must be highly resistant to the more degrading and reactive R22 chlorofluorocarbon refrigerant, as a gas, or as a liquid in {TAIL ~ any concentration} in a refined petroleum base or {HEAD ~ other lubricating oil}, or in a foamed state, at temperatures of up to about 185° C 
The protective sealing impregnant of this invention must be highly resistant to the more degrading and reactive R22 chlorofluorocarbon refrigerant , as a gas , or as a liquid in { TAIL ~ any concentration } in a refined petroleum base or { HEAD ~ other lubricating oil } , or in a foamed state , at temperatures of up to about 185 ° C
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