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How to replace an Esterbrook Sac

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I replaced my first Esterbrook sac yesterday thanks to the info in this post. Thank you!


My pen had been restored just a few years ago. Not sure why the sac failed. But, thankfully, getting the section out was very simple. I do have a question, however. I got some traces of shellac on the section. Can I safely use alcohol to clean it up (being careful, obviously, not to get any alcohol on the nipple/shellac/sac area)? Is regular isopropyl alcohol OK?





The section of an Esterbrook J is made from hard rubber. It is safe to get some alcohol on it but it can cause the HR to fade but will not damage it structurally as it might an acetate barrel.

If you want to remove some shellac you can use mineral spirits.

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Very helpful. Thanks all!

Currently: Sailor Pro Gear Black/Rhodium M/F with Sailor Jentle Black; Sailor Pro Gear Yellow/Rhodium M/F with Diamine Sargasso Sea; Sailor Pro Gear Slim Sky Demonstrator/Rhodium M with Sailor Jentle Blue; Sailor Pro Gear Apres Ski M with Robert Oster Grey Seas; Sheaffer Touchdown Imperial VIII M with Diamine Asa Blue; Lamy AL-star Ocean Blue M with Private Reserve DC Supershow Blue; Lamy Safari Red F with Sheaffer Skrip Red for grading papers; Lamy Safari Neon Yellow F with Diamine Kelly Green; Esterbrook J Blue 9668 with Noodlers Ottoman Azure; Esterbrook J Red 9668 with Diamine Red Dragon; Esterbrook J Copper 2668 with Diamine Ancient Copper; Esterbrook J Gray 9668 with Robert Oster Stormy Seas; TWSBI Vac700R M with Robert Oster Grey Seas; Noodler's Ahab Clear Demonstrator M with Diamine Midnight; Kaweco Skyline Sport M with Diamine Grey; Faber-Castell Goldfaber 1221 HB and Tombow Mono HB


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  • 5 months later...

thanks to the instructions, I was able to open my first Estie J. Soaked the section and top pen in hot water and was able to pull it loose. I cleaned out the old brittle sac and am waiting for the new sac to arrive to install it.

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