74 mph. Under sail. On water.

You gotta see this:

http://www.craftacraft.com/blog/2012/11/24/sailrocket-2

74 mph. Under sail. On water.

Singing the praises of aluminum tape

What keeps a tape from being permanent?  Two things:

• The substrate does not survive contact with moisture or sunlight
• The adhesive fails, usually due to exposure to sunlight, and dries out or crumbles

That should tell you why I like the aluminum tape you can buy at big-box home supply stores like Lowes or Home Depot. 

Look for it in the insulation aisle

The substrate is actually metal - it's aluminum - thin enough to stretch a little and to easily conform to almost any shape.  And because it is metal, no sunlight - zero sunlight - penetrates the substrate to attack the adhesive.  The metal is polished and apparently anodized - it survives years of exposure to sea air without a blemish.

And the acrylic adhesive they put on this tape is some of the most aggressive I have seen. And because it is protected, it is as easy to remove tape that has been in place for years as it is to remove newly-applied tape - the adhesive does not get hard.

Here are a couple of examples where this marvelous stuff is in use on Eolian:

• 
  Sealing the top of the mast boot. The tape adheres tenaciously to the mast, forming a permanent water-tite seal, and it conforms nicely in the task of overlapping the mast boot fabric. The hose clamp  serves to mechanically hold the boot in place - not to create a seal.
• 
  Sealing the joint where the two ends of the extrusion come together on our windows. When they came from the factory, there was an internal seal, but I had to destroy this to replace the glazing. The tape is a permanent cover for the joint.
• 
  Protecting the PVC used to make the new wind vane
  

Singing the praises of aluminum tape

I am thankful

I am thankful that our whole family could be together for Thanksgiving

I am thankful

Gotcha.

Today there was a most important convergence: It was not raining, and I was home while it was light. So I took another look at the mast boot.

Having given up on everything else, I cut a new one. Because I had the old one, I didn't have to go thru the patterning exercise - I just traced the old one onto the Naugahyde and cut it out. But first, of course, I had to pull the old one. It was instructive.

Here's the inside of the old one, showing clearly where water had been coming in. (Because of the way I laid it out in the cockpit, that's the bottom of the boot at the top of the picture.)  There are a couple of (dried) streams to the left in the picture, and one gigantic wet stream to the right of center in the picture.  When it was installed, this was at the back, where the sail track is on the mast - a tough place to seal.

The smoking gun

And look what I saw when I turned up the edge and looked closely at the boot where it went over the track.  Yep, the vinyl coating on the fabric had cracked, twice.

Some interesting gel-life growing inside the old boot

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Update:

Looks like someone is running a hose
on the deck above, doesn't it?

And wouldn't you know?  Mother Nature delivers a test storm not long after I get the new boot installed.  Perfect timing... and it's not just any storm - in fact it is a deluge of Biblical proportions - any minute now I expect to see pairs of animals lining  up out there on the dock.  It's been going on now for 24 hours, and there is no end in sight.

So far?  One drop. 

Yeah.

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Update #2:

Sunny and dry today (but cold).  This allowed me to inspect the new mast boot more closely than I was able to during and immediately after installation.  What I found was incomplete adhesion of the polysulphide I had used to seal the seam where the ends overlapped on the boot.

Drop explained.

And fixed.  (Replaced the polysulphide with 3M 5200.)

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Previous post in this series.

Gotcha.