A
Comparison
Dynax S50 is designed to protect steel surfaces in extreme conditions. It’s
well known that vehicle cavities are subject to a wide-range
of corrosive environments, from salt spray to high humidity,
heat, fresh water and freezing. The cavity wax chosen must
cope with all these variables and continue to provide the necessary
protection - maintaining the structural integrity, safety, and
value of the vehicle. It’s common for manufacturers
of cavity waxes to quote salt-spray results in hours for their
cavity waxes and while the salt-spray test is severe it’s
been shown that waxes with very good salt-spray performance can
rapidly deteriorate when the environment changes, for example
after a period of constant salt-spray they swell become bloated
and detach from the surface in an atmosphere of high humidity
alone. Dynax S50 has been proven to provide outstanding
salt-spray protection and continuing protection in changing conditions
with no swelling or detachment whatsoever. You’ll
see below how Dynax S50 compared with two extremely well known
cavity waxes in constant salt spray trials.
How Dynax S50 compares to leading competitors:
(from left to right)
- Acclaimed Swedish Cavity Wax shows high degree of failure.
- UK’s leading anti corrosion wax shows total failure.
- The final picture in the series below shows Dynax S50 protected metal is still in exceptional condition.

These
standardised test panels have been removed from an ASTM B-117
hot salt spray trial after an extremely aggressive 2000 hours.
- the rear of the panels show that the steel left unprotected
is almost corroded through.

The
panel fronts as removed are difficult to asses as corrosion streaks
and marks are left as during the test the unprotected panel edges
allow corrosion deposits to pour down the vertically positioned
panels.

After
solvent washing the panel fronts any remaining waxy film is removed,
allowing inspection of the underlying surface. Assessment
of the product performance is then easy. |
Penetration Tests
If you decide to treat your car or vehicle to additional corrosion
treatment it’s important to select a cavity wax that can
penetrate into welded flanges seams - these are the areas proven
to be the first to corrode - in fact the Swedish Corrosion Institute
conducted a thorough investigation into vehicle corrosion by
sawing open the bodies of 845 collision-damaged cars manufactured
between 1994 and 1997, the corrosion observed in the flanges
and seams resulted in the recommendation that even on cars with
reasonably good cavity fluid treatment applied at the factory
a complementary treatment be used within 3-4 years of manufacture.
This investigation also proves, despite popular belief, that
modern cars just like classic and vintage ones require after
market rust proofing.
Dynax S50 has a high solids content - over 50%, it’s
this content that forms the anti-corrosion coating, and whilst
other high solids materials don’t penetrate sufficiently
Dynax-S50 creeps by capillary action deeply into seams, flanges
and folded edges, in side-by-side trials Dynax S50 has been proven
to creep significantly further than other cavity waxes, some
with solids contents as low as 25%.

(from left to right)
- Acclaimed Swedish Cavity Wax
- UK’s leading anti corrosion wax
- Dynax S50
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