If you ook into the [VHB design document](https://multimedia.3m.com/mws/media/1732017O/3m-vhb-tape-design-guide-eu.pdf), the section _"How to Prepare Specific Surfaces"_ describes how to treat the surface: [![enter image description here][1]][1] For higher adhesion, a primer should be used according to the document. [This reference](https://www.can-dotape.com/resources/surface-preparation-to-ensure-a-successful-bond/#:~:text=In%20the%20majority%20of%20situations,before%20applying%20the%20adhesive%20tape.) describes that roughing up plastic parts is beneficial for the adhesion of tapes: > **Abrade the Surface:** Roughing up the surface (i.e. sanding) will loosen up any accumulated dirt, rust, or chipped paint. It will aid in the adhesion to painted surfaces or plastic items. A finely- abraded surface with shallow scratches created by a circular motion (rather than straight lines) has the best potential for a strong and persistent bond. This method can create up to a 40 % increase in surface area and can result in greater immediate and long-term bonding potential. Scrub pads, fine steel wool, or sandpaper can achieve the right level of abrasion. A palm sander could be helpful for larger jobs. Avoid using coarse abrasive materials because a too-rough substrate may inhibit the adhesive flow onto the surface. Always clean with the IPA/Water solution, or other solvents, and make sure all loose particles are removed. While it is not typical, some high-bond tapes adhere best to smooth, glassy surfaces, so double check with the manufacturer before you abrade the surface and compromise the bond strength. Both references describe the use of a cleaning solution based on 50 % water and 50 % IPA. ---------- A higher temperature is beneficial for obtaining the bond strength faster, the VHB design document shows that increasing temperature shortens the time when the full bond strength is reached: [![enter image description here][2]][2] [1]: https://i.sstatic.net/laL53.png [2]: https://i.sstatic.net/BQL8G.png