I have found that it works quite well for these kinds of materials and allows them to be handled more safely, never mind not getting on their neighbors on the shelf. It will not work well for leather that is flaking off in pieces. Should you get it, do test in an inconspicuous spot first. When applying use a soft brush (not the foam kind) and apply even strokes so as to reduce visible brush strokes. Smooth leathers like calf will show more than those with pronounced grains. Do not to apply too heavily. Leather will darken then lighten again, but still be slightly darker, especially where abraded. Hope this helps. p. ps. $50 is much less than taking to a conservator, but a conservator would also be able to remedy structural issues with the book. Date: Wed, 4 Feb 2015 12:10:41 -0800 From: Zoe Sandell <[log in to unmask]> Subject: cellugel for red rot Can anyone please describe your experiences using cellugel (or other) for red rot? I have two very old (1901) catalogues with leather covers that are deteriorating. I am hesitant to spend $50 plus shipping for cellugel without a sample first. I also do not think I will need 16 oz for two small covers. please let me know of any suggestions/advice thanks again Zoe ________________________________________ Peter D. Verheyen Bookbinder & Conservator, PA - AIC Email | [log in to unmask] The Book Arts Web & Book_Arts-L Listserv | http://www.philobiblon.com Pressbengel Project Blog | http://pressbengel.blogspot.com ~~~~~~~~~~~~~~~~~~~~~~ Mail submissions to [log in to unmask] For information about joining ARLIS/NA see: http://www.arlisna.org/membership/join-arlisna Send administrative matters (file requests, subscription requests, etc) to [log in to unmask] ARLIS-L Archives and subscription maintenance: http://lsv.arlisna.org Questions may be addressed to list owner (Judy Dyki) at: [log in to unmask] ~~~~~~~~~~~~~~~~~~~~~~