It seems like there is a problem with the web site. The Rust Defender instructions is all that I can get, even if I try spanish, so look at the top on the pdf page to see what you are looking at.
"It has better adhesion and more strength because of its self-etching characteristics. The zinc phosphate additive and solvents in this product react during curing and become part of the total solid binder. This replaces the “corrosion protection system” and improves strength and sealing properties. This product provides an excellent barrier between cured body filler and topcoats"
"It has better adhesion and more strength because of its self-etching characteristics. The zinc phosphate additive and solvents in this product react during curing and become part of the total solid binder. This replaces the “corrosion protection system” and improves strength and sealing properties. This product provides an excellent barrier between cured body filler and topcoats"