Kapton, kapton solves everything... almost.
[ Thursday - January 17, 2019 ]
As it turns out, the week of January 14 through January 18 has LA
seeing rain the entire week. This is unusual, but a welcome
and fun change. On Thursday, January 17, the rain was
monsoonal with the exception it's cold instead of warm. In the
past, I would ride around with the face shield cracked open to
prevent from fogging up. When I got the Drudi XD4, I bought a
pinlock face shield with an anti fog lens.
Drudi helmet on the left.
I still ware the Moxx helmet for commuting. Since I didn't
want to spend the extra $'s for a pinlock and fog lens, I went ahead
and bought just the fog lens. Now before you go on and ask the
question, "Is there something really special to the anti-fog
lens?" The answer is, yes. There is a special coating on
the lens that prevents moisture from condensing on the lens.
To a point. It's not just the air gap between the face shield
and the anti-fog lens. But... there is always a "but".
But the air gap between the anti-fog lens and the face shield has to
be completely sealed off otherwise moisture can get in between the
two lenses and fog up. If you ever look at ski goggles, they
have two lens with an anti-fog chemical coating.
Since I went cheaped out on not getting the pinlock face shield, I
had to get the second fog lens on the face shield some how. I
originally used scotch tape (for taping paper together) to hold the
anti-fog lens on the face shield. It worked well enough until
it started raining really hard. At that point, water got in
between and pooled in the gap between the face shield and the
anti-fog lens. The Scotch tape glue didn't stand a chance
against water. Since it worked well enough, it's time to find
a better tape to hold the anti-fog lense to the face shield.
Hah! It's magic. Kind of. What's the answer?
Why, Kapton tape. Also known as polyimide film tape. We
use it a lot at JPL. It's great as an insulator. Not
only that, it sticks to smooth surface and to itself like no
tomorrow. The glue on the film doesn't peal off when the tape
The gold tape on the face shield.
Here's a closer look.
Well, kapton tape doesn't solve everything, but it definitely solved
my anti-fog on a non-pinlock face shield. Sure enough, water
never got in between the face shield and lens.
Written on: January 22, 2019
Last modified: January 22, 2019