The Library operates a fumigation chamber to treat infested materials before adding them to the collection. Each fumigation cycle uses two cylinders of Nitrogen gas, consuming 13.6 cubic metres of Nitrogen gas.
The weight of the heaviest book in the Library is 3.5kg. It is a Vietnamese publication entitled Đại Từ Điển Kinh Tế Thị Trường (Dictionary on Market Economy).
As of July 2016, the Library has taken custody of the private papers of 22 prominent individuals, which includes S. Rajaratnam, David Marshall, H.S. Lee and Tan Chin Tuan. These private collections provide historical perspectives on social, political and other aspects on Southeast Asia. They are available for consultation at the Library upon request.
The Library has 18,046 reels of 35mm microfilm, the majority of them are regional newspapers. The Library has digitised closed to 15,000 reels as of August 2016 for online access.
The ISEAS Library has in its custody 75 glass plate negatives as part of its Southeast Asian Cultural Collection. The collection also includes an estimated 30,000 35mm framed colour slides and 40,000 rolls of negatives, mostly on buildings (architecture) and village people.
The Library has a total of 59,379 titles in its microfiche collection. 77% of these are in Indonesian language.
As of July 2016, the volume of loanable library materials (books and journals) is 189,073.
As of July 2016, the Library has a total of 62,821 titles on Indonesia.79% of them are in Bahasa Indonesia.