Because of such concerns the U.S. Department of Energy has convened a special task force to improve the safety and environmental impacts of such fracking for natural gas, including how best to dispose of the voluminous wastewater as well as ensuring proper sealing of wells to prevent such groundwater contamination. (scientificamerican.com)
That helps ensure proper sealing for the life of the engine and reduces the chance of gasket failure. (greencarcongress.com)
If you don't have canning jars with proper sealing lids (ie you are using recycled containers, etc.), melt some paraffin wax and pour a layer onto the top of each jar to seal. (cookingwithjax.com)