Surface prep is required to ensure a solid adhesive bond onto most surfaces. Any type of contaminants can inhibit a secure bond between the surface and adhesive. Whether you have a simple surface that requires general cleaning or a heavily saturated surface that requires a heavy-duty solvent based cleaner, a clean surface will always help you to achieve the ultimate bond between the surface and the pressure sensitive adhesive system.
THREE IMPORTANT STEPS TO ENSURE A SECURE BOND
As a general practice, wiping the surface with water or isopropyl alcohol and/or a mixture of the two will remove any excess dirt, oil or debris from the surface. It is important to use a cleaner that will not leave any residue behind. In some cases, surfaces are coated with heavy oils, grease or adhesive residue which may require heavy duty cleaners such as; Citrus based cleaners for surfaces that require cleaning, but are sensitive to heavy duty solvent based solutions or Mineral Spirits which is a solvent based liquid, derived from petroleum, normally used as paint thinner for surfaces that can handle a more abrasive cleaning solution.
ADHESIVE BOND PROMOTION
Adhesive bond promotion is required to ensure a solid adhesive bond onto surfaces that have a heavy recycled content, heavy duty plasticizers, uneven, slippery, textured and LSE surfaces. There are two reasons you would use a priming agent; the first is provide a layer that an adhesive system can grab onto if you are bonding to LSE substrates, the second is to seal the surface and ensure proper containment of any type of contaminants leaching out of the substrate that could diminish the adhesive bond over time. When a priming agent is applied it will seep into the pores of the substrate and therefore create a layer in which an adhesive system can bond to. Products most commonly used for adhesive promotion are Primers, Varnish and Paints.
Surface texturing is required on Plastics, LSE, Painted, Smooth, Slippery and uneven surfaces that you are bonding an adhesive system to. The texturing of the surface can be accomplished by scratching the surface with steel wool, sand paper or scouring pads. This manner of texturing the surface will provide your adhesive system with something to “grab.” As a general practice, wiping the surface with water or isopropyl alcohol and/or a mixture of the two will remove any excess dirt, oil or debris from the surface after texturing.