3M silane glass treatment AP115 is an IPA based silane glass treatment that is used in conjunction with 3M VHB tape to promote adhesion. It is easy to apply using the 4 fl-oz. Spray bottle and is also available in a 1 gallon bulk bottle. It is clear in color. Our 3M silane glass treatment AP115 is a solvent mixture of isopropyl alcohol and water that is used to increase adhesion of 3M VHB tapes to uncoated glass surfaces. Glass surfaces are water loving in nature, which can cause issues in humid or wet environments when attempting to create a strong, long lasting adhesive bond. Moisture can undercut the tape bondline and interfere with normal adhesion forces. 3M silane glass treatment AP115 creates a hydrophobic surface that protects the 3M VHB tape and bonds in even the most moist environments. Easy to apply and clear in color.