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I switched to mineral oil (same as for pcr). You can apply it either with a 1mL pipet tip or with use a glass vial with the same diameter as the linbro wells as a stamp. This is much nicer as round cover slips do self-center and opening is gentler on the slips, too. HTH, Jens On Thursday 27 November 2008 06:52:52 hugh morgan wrote: > Hi, > I have just been informed that it is no longer possible to get the soft > white paraffin, for sealing cover slips, from VWR any more. If anyone knows > of an alternative supplier please let me know. > > Thanks in advance > > Hugh