What is the difference between CouplerTec systems and conventional rust-proofing methods, e.g. sprays and coatings?

Sprays and coatings are only as good as where they can reach. Unless your vehicle is totally stripped internally, there is absolutely no way you could protect any more than 60% of the vehicle’s metal surface. CouplerTec, on the other hand, reaches 100% of the surface, helps prevent stone chips from rust growth and the system can be taken to your next vehicle.
Unlike conventional rust-proofing methods, CouplerTec systems have been proven to be effective, simple to use, man- and nature-friendly, and they also reduce maintenance and repair costs associated with corrosion.