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View Full Version : Cuben Fiber Tarp - minimal sewing, using tape



SGT Rock
2011-08-03, 01:09
A friend of mine asked me to make him a Cuben Tarp. As some may know, I did mine using VHB tape for most of the work, keeping sewing to a minimum. I think it makes for a stronger tarp overall.

So this time I made a video about it so you DIY guys can see how it is done. Maybe it will help some of you to think through a Cuben Tarp DIY project, maybe it will scare some of you off.

BiFy90s_Zng

http://www.youtube.com/watch?v=BiFy90s_Zng

Stir Fry
2011-08-03, 09:07
Where do you get the tape? I looked in the internet and what I'm finding is $67.50 for one role. Does that sound right to you?

SGT Rock
2011-08-03, 11:57
Here is a link to the tape I use:

http://www.rshughes.com/products/021200_13974.html?

I use the 1/2 inch wide tape. If I did these a lot I would probably get a roll of 1" wide as well. A 1/2" x 60yard roll is plenty plus extra for this project and is about $28.23 per roll. It isn't cheap, but it is very good at what it is made for.

SGT Rock
2011-08-03, 12:18
Also, here is a link to the primer on the same site: http://www.rshughes.com/products/021200_23926.html

1/2 pint would probably last for a lifetime of tarps. You can use a sponge brush to apply it, and do a light coat because you can't apply the tape until the surface dries. 1/2 pint is $15.89. Be advised that they charge an arm and a leg for shipping. My shipping on these two items came out to be $14.99 and also they added $4.08 in sales tax. So for all the tape and primer came out to be $66.19.

JoeyB
2011-08-03, 16:17
still much cheaper than buying one outright.....
http://www.zpacks.com/shelter/hammock_tarps.shtml

saving my beans for one of these for the fall/winter backpack trips.

generoll
2011-08-03, 17:40
what's Cuben Fiber?

SGT Rock
2011-08-03, 17:44
Newest miracle fiber everyone wants. Sil-Nylon is so yesterday.

generoll
2011-08-03, 22:53
so canvas is out?

Lugnut
2011-08-03, 23:11
so canvas is out?

For everyone except the Marines. :angel:

SGT Rock
2011-08-03, 23:47
Rubberized canvas like Earl used.

General
2011-08-04, 20:24
stitches are better than tape in the long run. #46 bonded nylon for cuben.

SGT Rock
2011-08-04, 21:00
Have you ever use VHB?

General
2011-08-04, 21:51
nope, but fiber lasts longer than chemicals.

SGT Rock
2011-08-04, 22:24
You really should look at VHB. You might change your mind.

Stir Fry
2011-08-05, 00:07
How much weight does the tap add. I have already sewn my tarp thinking of using tap to put a small piece of cuben over the stiching kind of a seam sealer. Looks like it would work better then sil-net.

SGT Rock
2011-08-05, 04:24
It works great, a lot better than sealing with glue. If you tape it, it will actually be stronger than it was before you sewed the strip into it. Apparently sewn cuben tarps were failing along the stitching, especially on the ridges where you basically poked a couple of rows of holes in a direct line - setting the mylar up for later failure. That is what prompted MLD to change to a chemically bonded ridge, and why they ask that you not stuff their cuben stuff sacks.

As for weight, I am not totally sure. One thing I haven't ever done is try to figure out how much that stuff weighs after bonding. I have noticed that the weight of the tarp drops by about 0.05 about 24 hours after bonding. It is only 2mil thick, and the weight of the materials going into the tarp before I glued it was.... ~6.92oz if I just did the math right. So the tape after drying out for the entire tarp was.... 0.92oz and that was for 586 square inches of tape. So that would be.... 0.00159 ounces per square inch???

If I calculated all that right, to make a layer of this that is 1"x132" would weigh 0.21 ounces for the glue, and if you are using 0.51oz cuben for the backing layer would be 0.10 ounces, so together they would add about 0.31 ounces to your tarp. I could be way wrong on that though since I never did a before and after weight on the tarp materials.

SGT Rock
2011-08-05, 21:12
I redid the math today while I was on break at work. It looks like the tape weight per square inch would be 0.001159, so 1"x132" would equal .15oz, and the strip would come in around 0.25 ounces total.

Lugnut
2011-08-05, 21:19
I redid the math today while I was on break at work. It looks like the tape weight per square inch would be 0.001159, so 1"x132" would equal .15oz, and the strip would come in around 0.25 ounces total.

You must have really boring breaks! :aetsch:

SGT Rock
2011-08-05, 21:23
Tomorrow should be more exciting:

http://www.hiroshimacommittee.org/

Stir Fry
2011-08-11, 14:56
Rock I got the tape in and tried it. After 24 hours I looked at the joint and the sheer strengh was ok but it still pealed when i grabbed the corners. I did not get the primer but did use mineral sperits. Does it actualy set up better than what I have tested.

SGT Rock
2011-08-11, 15:00
I've never had any peel off except the one pull out I tried using aquaseal on as a glue instead of the 9460.