Comparing Air Sealing Tapes
I’d like to offer my input and experience regarding two tapes–Siga and 8067–that I have previously asked about here prior to my use of both products.
As far as performance in terms of adherence to XPS, which was my requirement, the two tapes performed equally well and in fact seemed to be identical in terms of their respective adhesive properties.
I spoke with a Siga rep and asked if he could explain the difference between the two. The main difference I understood from his explanation is that Siga is vapor permeable. 8067 definitely is not as vapor open. The rep explained that 8067 has no backing and will not stick to itself. It most definitely does have a backing and sticks extremely well to itself.
The backing is also offered split. 8067 is offered in 2,3,4,6,9 or 12″ widths. The working temperature ranges are the same as is UV resistance.
In a nutshell, if someone were asking me for recommendations regarding the two my answer would be dependent on whether they need the tape to be vapor permeable or not. That’s really the only viable consideration I can see, and certainly a consideration if your enclosure needs to dry to the exterior. Other than that, the width selections, adhesive quality, and price difference would have me recommending 8067. Siga would have cost me $800 to tape all seams, while I could do it with 3″ 8067 for just over $500.
As a side note, the company I purchased the 8067 from was out of stock of 3″ and offered me 4″ for marginally more. Having that greater area of adhesion makes sense to me.
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