Techniques: Sealing of Museum Jars with Silicone Mastic

The following article was sent in by Velson Horie, Keeper of Conservation at Manchester Museum, in response to Jenny Clack's request for information on sealants for museum jars (see also Martin Linnie's letter on the subject). It first appeared in CONSERVATION NEWS no 20, March 1983. I am grateful to Velson Horie and the editors of CONSERVATION NEWS for permission to reproduce it in full.