Re: Stus-List 3M VHB Tape

[Dr. Mark Bodnar via CnC-List]

  
  


Fred,
I'd suggest following the advice in the Sail Mag article
http://www.sailmagazine.com/diy/maintenance/replacing-fixed-portlights/
And http://svjohannarose.blogspot.ca/search/label/NewPorts

I did my windows this spring.  It went pretty smoothly.  I
  initially thought I'd want to spread the sealant on the cabin side
  before I attached the window - but couldn't see how I could keep
  the tape clean.  In the end - using the "tape hinge" method to get
  the window in the right place and attached, then masking around
  the window and squeezing the caulk sealant in from the outside
  filled the gap easier than I expected.
The biggest challenge I had (after getting the windows out) was
  cutting and shaping my windows.  Putting them in and sealing was a
  long day - but not as fraught with challenges as most other boat
  projects I've faced.

Mark
CS 30 - Prosecco
Deep Cove Nova Scotia



There is no cure for birth and death save to enjoy the interval.
  - George Santayana
On 2017-07-26 11:25 AM, Frederick G
  Street via CnC-List wrote:


  
  Hi, Fred — as long as the peel-off backing is still on both sides
  of the tape, you can cut it with a sharp scissors.  I just did a
  square or angled cut as needed to the tape, then butted the next
  piece right up to the previous piece and kept going.
  
  
  If I understand your second question, when I had the
acrylic cut for the new windows, I made sure I had at least 1/8”
or more all the way around the window between the acrylic and
the mortise into the cabin top; then the Dow 795 was “injected”
into that gap under pressure so it squeezed around under the
acrylic up to where the tape was.  I also tended to hold the
tape off the inside opening a bit, so it didn’t show so much
from the inside.  That made for less of a gap between the
outside edge of the acrylic and the tape under it.
  
  
  And the VHB tape isn’t really permanent; it just
sticks really well.  If you get a putty knife
into the small crack between the acrylic and the cabin top from
inside the boat, you’ll eventually be able to work your way
around the opening and get the thing loose.  But it’ll take a
while, and you’ll definitely wreck the old acrylic in the
process.  Hopefully, you’ll have many years before you’ll need
to do this…
  
  
  — Fred

  
  



  

  

  Fred Street -- Minneapolis
  S/V Oceanis (1979
  C Landfall 38) -- Bayfield,
  WI
  

  

  
  
  




  
On Jul 26, 2017, at 9:16 AM, Fred Hazzard via
  CnC-List 
  wrote:


  
Now
  that I have bought the 4991 tape some questions occur
  to me.


Assuming
  I want the tape to just outline the window opening,
  can I cut the the tape to go around the corners
  without sticking to the scissors or sharp blade?  The
  shape of the window opening has some rather quick,
  tight turns.  The radius of one turn is no more than
  the radius of a dime.


Another
  question is about the use of the Dow 795 silicon. 
  When do I apply the silicon?  Because the tape is 1/2"
  wide and the some of the window will extend more than
  1/2" beyond the tape, if I put the silicon on before
  affixing the window I can see the silicon squeezing
  onto the tape as I apply pressure. If I put the
  silicon after sticking the window in place I can see
  difficulties in getting it into the area that is less
  than 1/8" thick. 


Another
  question is more of a long term problem.  Assuming
  that I have my boat until the windows need replacing
  again,  how will I be able to remove one if the tape
  is 

Re: Stus-List 3M VHB Tape

[Dennis C. via CnC-List]

Tape the cabin top and window lens (if the protective layer has been
removed). "Push" the tip of the silicone gun or tube.  Don't pull it.  Keep
a small bubble of silicone on the front of the tip.  That will ensure you
are forcing silicone into the gap.  Once you've injected the silicone all
the way around, use the back side of a plastic spoon to smooth the silicone
into a concave shape.  Keep the spoon moving smoothly.  Don't start and
stop.  If you find a gap or two in the silicone, fill it quickly and run
the spoon around again.

Press the spoon fairly hard.  It will remove the silicone immediately on
either side of the gap.  Let it cure a bit.  Check the cure by touching the
excess silicone on the tape not in the gap.  When it is moderately firm but
not completely cured, pull the tape making sure you pull away from the gap.

The result should be a really nice "factory" look.

Dennis C.
Touche' 35-1 #83
Mandeville, LA

On Wed, Jul 26, 2017 at 9:16 AM, Fred Hazzard via CnC-List <
cnc-list@cnc-list.com> wrote:

> Now that I have bought the 4991 tape some questions occur to me.
>
> Assuming I want the tape to just outline the window opening, can I cut the
> the tape to go around the corners without sticking to the scissors or sharp
> blade?  The shape of the window opening has some rather quick, tight
> turns.  The radius of one turn is no more than the radius of a dime.
>
> Another question is about the use of the Dow 795 silicon.  When do I apply
> the silicon?  Because the tape is 1/2" wide and the some of the window will
> extend more than 1/2" beyond the tape, if I put the silicon on before
> affixing the window I can see the silicon squeezing onto the tape as I
> apply pressure. If I put the silicon after sticking the window in place I
> can see difficulties in getting it into the area that is less than 1/8"
> thick.
>
> Another question is more of a long term problem.  Assuming that I have my
> boat until the windows need replacing again,  how will I be able to remove
> one if the tape is "permanent".
>
> Any other suggestions about the use of the tape will be appreciated.
>
> Fred Hazzard
> S/V Fury
> C 44
> Portland, Or
>
>
> ___
>
> This list is supported by the generous donations of our members. If you
> wish to make a contribution to offset our costs, please go to:
> https://www.paypal.me/stumurray
>
> All Contributions are greatly appreciated!
>
>
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List 3M VHB Tape

[Frederick G Street via CnC-List]

Hi, Fred — as long as the peel-off backing is still on both sides of the tape, 
you can cut it with a sharp scissors.  I just did a square or angled cut as 
needed to the tape, then butted the next piece right up to the previous piece 
and kept going.

If I understand your second question, when I had the acrylic cut for the new 
windows, I made sure I had at least 1/8” or more all the way around the window 
between the acrylic and the mortise into the cabin top; then the Dow 795 was 
“injected” into that gap under pressure so it squeezed around under the acrylic 
up to where the tape was.  I also tended to hold the tape off the inside 
opening a bit, so it didn’t show so much from the inside.  That made for less 
of a gap between the outside edge of the acrylic and the tape under it.

And the VHB tape isn’t really permanent; it just sticks really well.  If you 
get a putty knife into the small crack between the acrylic and the cabin top 
from inside the boat, you’ll eventually be able to work your way around the 
opening and get the thing loose.  But it’ll take a while, and you’ll definitely 
wreck the old acrylic in the process.  Hopefully, you’ll have many years before 
you’ll need to do this…

— Fred

Fred Street -- Minneapolis
S/V Oceanis (1979 C Landfall 38) -- Bayfield, WI

> On Jul 26, 2017, at 9:16 AM, Fred Hazzard via CnC-List 
>  wrote:
> 
> Now that I have bought the 4991 tape some questions occur to me.
> 
> Assuming I want the tape to just outline the window opening, can I cut the 
> the tape to go around the corners without sticking to the scissors or sharp 
> blade?  The shape of the window opening has some rather quick, tight turns.  
> The radius of one turn is no more than the radius of a dime.
> 
> Another question is about the use of the Dow 795 silicon.  When do I apply 
> the silicon?  Because the tape is 1/2" wide and the some of the window will 
> extend more than 1/2" beyond the tape, if I put the silicon on before 
> affixing the window I can see the silicon squeezing onto the tape as I apply 
> pressure. If I put the silicon after sticking the window in place I can see 
> difficulties in getting it into the area that is less than 1/8" thick. 
> 
> Another question is more of a long term problem.  Assuming that I have my 
> boat until the windows need replacing again,  how will I be able to remove 
> one if the tape is "permanent".
> 
> Any other suggestions about the use of the tape will be appreciated.
> 
> Fred Hazzard
> S/V Fury
> C 44
> Portland, Or
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Stus-List 3M VHB Tape

[Fred Hazzard via CnC-List]

Now that I have bought the 4991 tape some questions occur to me.

Assuming I want the tape to just outline the window opening, can I cut the
the tape to go around the corners without sticking to the scissors or sharp
blade?  The shape of the window opening has some rather quick, tight
turns.  The radius of one turn is no more than the radius of a dime.

Another question is about the use of the Dow 795 silicon.  When do I apply
the silicon?  Because the tape is 1/2" wide and the some of the window will
extend more than 1/2" beyond the tape, if I put the silicon on before
affixing the window I can see the silicon squeezing onto the tape as I
apply pressure. If I put the silicon after sticking the window in place I
can see difficulties in getting it into the area that is less than 1/8"
thick.

Another question is more of a long term problem.  Assuming that I have my
boat until the windows need replacing again,  how will I be able to remove
one if the tape is "permanent".

Any other suggestions about the use of the tape will be appreciated.

Fred Hazzard
S/V Fury
C 44
Portland, Or
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!