Bostik Stix A640 Pressure Sensitive Adhesive - High performance, solvent-free, pressure sensitive adhesive A high performance, solvent-free, pressure sensitive flooring adhesive. The water-based pressure sensitive vinyl adhesive is ideal for bonding PVC sheet and tile coverings. It has been specially formulated to give a high initial tack and excellent bond strength, and dries to form a permanently tacky film, offering excellent adhesion as either a wet or dry stick adhesive.