Good Sam Club Open Roads Forum: Tech Issues: Are Butyl Tapes Equal?
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 > Are Butyl Tapes Equal?

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bajajoaquin

Irvine, CA

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Posted: 09/22/21 09:07pm Link  |  Quote  |  Print  |  Notify Moderator

I’m looking at a solar install and plan to use strut channel to mount the panels to the roof. I saw another camper do similar and seal it by putting down 3” squares of butyl tape where he screwed into the roof and then covered with dicor.

Looking at Amazon, there are tons of tapes at different price points. Are they all that different? What is a good brand or source? I really don’t want to save $10 to risk thousands in leak repairs later.


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BobsYourUncle

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Posted: 09/22/21 09:50pm Link  |  Quote  |  Print  |  Notify Moderator

No, not all equal.

3 basic types:

1) Your basic cheap putty tape.
This stuff is junk and holds no place in an RV.

2) Poly-butyl blend. (IIRC, that's what it's called)
Better, but still nothing to write home to mother about.

3) Pure butyl tape.
The most expensive but the best choice. It sticks very well to all surfaces, never hardens or crumbles and remains pliable for years. And its a bear to remove. That's a plus, not a negative.

As you said, for a few bucks more a roll, get the good stuff. It is well worth it. I have a part roll of it in my box of goodies I keep in my TT and it is still soft and pliable in spite of being many years old.

I personally would not buy this type of stuff from Amazon. Chances are it comes from China and holds the same quality as their tires....
You may pay more, but find some good old Made in USA product.

This info is based on my experience from a bunch of years ago. Maybe they have something better now, I don't know.


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OkieGene

oklahoma city

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Posted: 09/22/21 11:21pm Link  |  Quote  |  Print  |  Notify Moderator

Consider using Eternabond. That stuff seriously sticks!!!

bajajoaquin

Irvine, CA

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Posted: 09/23/21 06:54am Link  |  Quote  |  Print  |  Notify Moderator

Where would be a good source to buy pure butyl tape or ernabond?

chuckbear

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Posted: 09/23/21 06:56am Link  |  Quote  |  Print  |  Notify Moderator

OkieGene wrote:

Consider using Eternabond. That stuff seriously sticks!!!

Eternabond tape and butyl tape is not the same and used for different purposes. Chuck

BarneyS

S.E. Lower Michigan

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Posted: 09/23/21 08:39am Link  |  Quote  |  Print  |  Notify Moderator

bajajoaquin wrote:

Where would be a good source to buy pure butyl tape or ernabond?

I have purchased my Eternabond tape for many years from Best Materials but they also sell Butyl Rubber sealant tape.

Here is the 4 inch Eternabond tape that I have used extensively on my roof. It has been on there for almost 15 years and was just recently removed when I had my roof recovered.

I have found that Best Materials usually has the best price for most roofing/caulking type products.
Barney

* This post was edited 09/23/21 08:46am by BarneyS *


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bajajoaquin

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Posted: 09/23/21 09:12am Link  |  Quote  |  Print  |  Notify Moderator

Thank you very much. Can I impose a bit more? What is the difference in use cases for eternabond and butyl tape? Which would be better for my application?

DrewE

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Posted: 09/23/21 10:35am Link  |  Quote  |  Print  |  Notify Moderator

For one rather obvious difference, butyl tape is used sandwiched between two surfaces, while Eternabond goes across a joint or hole. Put another way, butyl tape is double-sided tape, while Eternabond is single-sided tape.





bajajoaquin

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Posted: 09/23/21 10:59am Link  |  Quote  |  Print  |  Notify Moderator

Awesome, thank!

LouLawrence

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Posted: 09/23/21 10:59am Link  |  Quote  |  Print  |  Notify Moderator

^^^^^Correct^^^^^. If you want something to go under the feet of something being mounted you would not use Eternabond. Use the tape and then cover the screw with Dicor so you can get all around the foot, tape and screw. If you want to seal edges of things (vents, drip edges, etc.), Eternabond is a great application.

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