Cross-Hatch Testing Tape – 1" x 60 yds.
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If you are a user of ASTM D3359, then you are most likely already familiar with the Permacel P-99 tape. It was the only tape listed in the standard as being reported to be suitable for the purposes of the standard. Unfortunately, Permacel discontinued the manufacture of P-99, leaving users of the D3359 wondering how they can maintain some level of consistency and continuity in their testing processes.
As respected members of the adhesion testing community, and as ASTM members ourselves, we at SEMicro undertook the challenge of finding possible alternatives.
What we found was surprising!
There really is no "off the shelf" tape like the P-99.
The next closest tapes had an adhesive strength substantially higher or lower than the P-99.
The use of one of these tapes as a substitute for the P-99 would often result in a different classification rating when compared to results with P-99.
This explains why ASTM had only listed Permacel P-99 in the footnotes. No other product had been reported to provide consistent and reliable results. At that point, we approached our formulator to examine the components of the P-99 – the adhesive, the backing, etc. We challenged them to develop a product that we could say was a direct replacement for Permacel P-99 so we could provide users of D3359 with a seamless transition from testing with P-99 to testing post-P-99. We have no doubt you'll agree that we succeeded!