7975 Water Based Adhesive is used on the casing-in machine ... the book with the hardcover. 7975 Water Based Adhesive is enviromental friendly,no formaldehyde and no phthalates added ... : casing-in machineCaution: Don't mix with other adhesive,always keep the barrellid close tightly. Best storage temperature ... If the storage temperature below 4 degree,the adhesive will lose its efficacy. 7975 water based ...