The choice of the most effective penetrant system for any given application is a complex matter and not simply one of price per barrel. There are a number of different parameters which should be carefully examined before a decision is taken.
The parameters of primary importance fall into two categories: Those which determine performance and those which should influence the choice of any particular penetrant system by a user.
The parameters influencing performance include physical properties, stability, specification compliance, quality and reliability; those influencing choice include performance, cost effectiveness, process specifications, service, certification, environmental and safety considerations.