capable of bonding to surfaces with the application of light pressure is a chemical or physical reaction?

Capable of bonding to surfaces with the application of light pressure is a chemical reaction.

Explanation:

Here, bonding occurs. Bonding results in destruction of old bond and formation of new bonds. Hence new substance with completely different properties is formed. These changes occur only in a chemical reaction.

In physical processes no new substance is formed (no bonding). So, no change in properties of a substance. ]

This process (capability of bonding to surfaces with the application of light pressure) results in chemical reaction.

This type of substances are called Pressure-sensitive Adhesives. (PSA)