How Do The Professionals Free Up a Seized Stop Valve ?
Professionals Use 'CRACK IT SPRAY'
What is CRACK IT SPRAY ?
CRACK IT freeze release spray is an 'Aerosol Shock-Freeze Release Lubricant'
It releases seized and corroded parts through shock freezing. The freeze action breaks the corrosion seal and allows the penetrant to reach the corroded area, releasing the seized items in 1-2 minutes. Crack-It also helps to prevent future corrosion.
Applying this spray contracts the part you are spraying which in turn breaks any corrosion that is preventing the part from turning.
This product is now readily available in non trade retail stores and online.