Shimano Readies Mastiff Fluorocarbon Line with Nanoarmor
Introduction: Shimano has been in the line game for a while now with
their PowerPro brand of braided superlines, and this season is introducing a new
fluorocarbon line called Mastiff. Designed and manufactured in Japan, Mastiff is
engineered with a technology called Nanoarmor, which incorporates nano-sized
ridges to deliver several performance advantages.
Shimano's engineers in Japan have
been working on a new fluorocarbon line called Mastiff
Nanoarmor: With a name that sounds straight out of the Stark vault of Iron Man
tech Shimano’s new Mastiff line features Nanoarmor, a proprietary technology
which features nano-level ridges on the line’s surface. These tiny ridges are
designed to help provide extra grip so that knots set properly while preventing
the knots from both slipping and breaking, and all without sacrificing any
resistance to abrasion and stretch.
Mastiff is a 100% fluorocarbon
that features Nanoarmor, tiny nano line ridges that bind to give anglers optimal
knot and shot strength
I received some of the new line direct from Shimano and when I ran my fingers
over even the larger diameter lines could not detect any of these ridges, the
line felt both smooth and supple. Nanoarmor differs from many competing
fluorocarbon lines which utilize a soft outer shell to increase knot binding
strength. While this traditional method works great for improving knot holding
it also has the unintended negative result of adding stretch and impacting
abrasion resistance throughout the line.
Like other premium likes Mastiff is precisely wound with
I asked Shimano if the nano ridges had any impact
on casting distance and feel. They explained that the design improves both as
the ridges run linear along the line so that there is less surface contact with
rod guide inserts, allowing for less friction and both long and smooth casting
performance. The concept reminded me of Scientific Angler’s Sharkskin fly line,
only at a much smaller nano level.
I was eager to spool up my Stella
FK to cast the new line
I spooled up my Shimano Stella FK with 6lb. Mastiff and head straight for the
local lake to make a few casts and found the line very competitive with some of
my favorite FC lines. The Mastiff cast so smoothly that I wondered how the
nano-ridges would come into play as the line looked totally smooth in bright
sunlight, so I headed back to the lab to put the line under our scope.
Under magnification the ridges can
Under a few times magnification I could make out
the linear ridges running along the line, and under extreme magnification I was
surprised to find the surface didn’t look like traditional smooth line at all
and more resembled fabric or even wood grain.
When magnified many times the
surface of Mastiff reveals the nano ridges
I am finding that knots hold quickly and cleanly
and we will be reporting tensile and knot strength data in more detail in a
complete review. Thus far I'm liking the overall handling of Mastiff but have
only casted the lighter 4 and 6lb. test lines.
Looking at a knot under the scope.
The line does hold very tight and it will be interesting to see how it handles
both shock and abrasion
Mastiff was designed by Shimano engineers and will be manufactured in Japan.
Like other premium JDM lines this FC looks accurately rated so that diameters
are thin and correspond to the various line tests.
Mastiff will be available in
Mastiff will be available in 3 through 20lb. tests
and is classified as a 100% fluorocarbon main line, though it can also serve as
FC leader material.
Mastiff will be manufactured in
Japan and become available later this summer in the U.S.
The official launch date for Mastiff will be in July at ICAST 2023, and price
points will be announced at that time. My understanding after speaking to the
team at Shimano is that availability of the line will be later this Summer.
Spooled up and ready for battle.
Time to see how Mastiff performs under the pressure of running fish
Our Quick Take: Shimano’s prostaff have been using Mastiff for a few
months now and it was a fluorocarbon line that Gussy recently used to win the
Bassmaster classic. In terms of handling, Mastiff feels supple and shoots well
and we will be testing the tensile and knot strength on the Machine, as well as
seeing how the line holds up to the stress of everyday fishing. I’ve just
started fishing with Mastiff and thus far like the way that it handles, and will
be comparing it all season with Seaguar Tatsu, my current go-to fluorocarbon
line. It will take a lot for me to spool up my finesse setups with something
other than Tatsu, given my experience and trust in the line, but I’m looking
forward to seeing how Mastiff’s Nanoarmor design translates to performance, and
feel, on the water. Shimano's tagline with the Mastiff is "Connected
Confidence," let's find out just how strong this new contender really is.