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Subject: Polyurethane wood sealants

Polyurethane wood sealants

From: Zee-Young Chin <zychin14<-a>
Date: Saturday, February 26, 2005
I have seen wooden backing boards in display cases and storage boxes
treated with liquid polyurethane. Stretcher bars are sealed with
polyurethane also for the same purpose.

How effective is a polyurethane coating as a barrier for acid
migration from wood?  I would also like to know how long
polyurethane has been used for this purpose and if it is stable and
safe as it ages.

Zee-Young Chin,
Student in conservation
Avignon, France

                  Conservation DistList Instance 18:41
                  Distributed: Tuesday, March 8, 2005
                       Message Id: cdl-18-41-008
Received on Saturday, 26 February, 2005

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