Pensel GA-90 Pentaerythritol ester of rosin Arakawa Chemical Tackifier >> Rosin ester >> Penthaerythritol (penta) ester SEALANT ADHESIVE PENSEL GA-90 is pentaerythritol ester of rosin, which is developed as tackifier for various kinds of adhesive and sealant applications. It is a low odor resin with good heat stability. It is compatible with a wide selection of elastomers and solvents. Pentaerythritol ester of rosin. Offers low odor and good heat stability. Used as tackifier for various kinds of adhesive and sealant applications.