How are NeXtal deep-well blocks sealed? Can they be resealed?
FAQ ID -1128

Each well of NeXtal DWBlocks contains 1.5 ml of solution. To avoid leakage and evaporation, NeXtal DWBlocks are heat-sealed using a pierceable/peelable aluminum foil. To access solutions, the foil is simply pierced with the supplied piercing tool. This process reduces condensation and cross-contamination problems. NeXtal DXBlocks can be repeatedly resealed using adhesive aluminum foils (provided with each NeXtal DWBlock).

NeXtal DWBlock Adhesive Foils are also available separately.