Hi,

What solvent could I use to re-liquify the tank sealant, in case I needed to seal a pin hole or some other reason

Once the KBS Tank Sealer is completely cured, no solvents will touch it. KBS Strip can be used to remove it but if you do the tank sealing process correctly, there will be absolutely no reason to remove it.

Tank Sealer will seal up pinholes (tip of pin) and if you have holes larger than pinholes, plug the holes first from the outside with NuMetal Epoxy Putty of KBS Patch first and then do the KBS 3-Step Tank Sealing System on the inside of the tank.

Your Success is Extremely Important To Us! We want your project to be a complete success so please be sure to read through carefully the following documents which will ensure your success using KBS Coatings.
Tank Sealer Directions: https://www.kbs-coatings.com/tank-sealer-directions.html
Tank Sealer: https://www.kbs-coatings.com/tank-sealer.html
Tank Sealer Kits: https://www.kbs-coatings.com/tank-sealers.html
Tank Sealer Application Videos: https://www.kbs-coatings.com/instructional-videos.html#ts
Tank Sealer Flow Chart: https://www.kbs-coatings.com/tank-sealer-flow-chart.html
Tank Sealer How-To Section: https://www.kbs-coatings.com/how-to-sealing-gas-tank.html
Tank Sealer Fix-It Guides found here: https://www.kbs-coatings.com/fix-it-guide-tank-sealer.html

Please let us know if that helps and if you have any additional questions. Thanks for choosing KBS Coatings.