Comfort Lining thermoplastic denture adhesive and Cushion Grip thermoplastic denture adhesive are one of the favorite products out. Why are these thermoplastic denture adhesives so popular, because they last up to a week with one application. Creating a clean environment in your mouth as there is no messy paste under the dentures with a thermoplastic denture adhesive. These thermoplastic denture adhesives are by far the best denture adhesives for dentures. Strongest Denture Adhesives leaving a secure cushion comfort.