Product Review: Books by Hand PH Neutral Adhesive with spout - 4 oz bottle I recently purchased the Books by Hand PH Neutral Adhesive with spout - 4 oz bottle and I have to say that I am very impressed with this product. The adhesive is easy to use, dries quickly, and leaves no residue behind. It also has a long shelf life, which means that you can keep it in your storage for a long time without worrying about it going bad. One of the things that I appreciate most about this adhesive is its pH neutrality. This makes it perfect for use with acid-free paper and other materials that are sensitive to acids. It also means that you can use it on a wide range of surfaces, including leather, fabric, and metal. The spout on the bottle is another great feature. It allows you to easily apply the adhesive without having to dip your finger in the bottle each time. This makes it much easier to work with and reduces the risk of contamination. Overall, I would highly recommend this adhesive to anyone who needs a reliable and easy-to-use glue for their bookbinding or other projects.