The Collaborative International Dictionary of English v.0.48:

bondable \bondable\ adj.
   1. capable of being fastened or secured with a rope or bond.

   Syn: bindable.
        [WordNet 1.5]

   2. capable of holding together or cohering; as particles in a
      mass.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

bondable
    adj 1: capable of being fastened or secured with a rope or bond
           [syn: bindable, bondable]
    2: capable of holding together or cohering; as particles in a
       mass