Perseus v. Blue Monster Comparison
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Merco Persues PTFE Threadseal Tape Line Art

Perseus,
or Blue Monster Tape?

Does Your Band of PTFE Threadseal tape:

Perseus™

Blue Monster Tape

Contain 100% Pure, White, PTFE, insuring no adulteration or contamination of non-PTFE ingredients? (Pure PTFE is not blue)

yes

no

Meet Mil Spec T-27730A? And clearly marked that it does?

yes

no

Meet UL certification? And clearly marked that it does?

yes

no

Have instructions for use printed on the product?

yes

no

Have a label on both sides, insuring instant customer brand recognition no matter which way the product is put down?

yes

no

Have a user-friendly label, one that doesn't require removal or ripping for easy product application?

yes

no

Available only in traditional industry-standard, contractor-friendly lengths?

yes

no

Available from a trusted supplier that knows tape, and only tape, since 1972?

yes

no

Merco Perseus PTFE Threadseal Tape Rolls

Teflon® is a trade mark of the Du Pont Company. Threadmaster® and Perseus™ are trade marks of the Merco Company.
We assume Blue Monster is a trade mark of Mill-Rose, but we can't really find any indication on their web site...

The original PTFE resin was invented by DuPont in 1938 and called Teflon®. While all Teflon® is PTFE, not all PTFE is Teflon®. As stated in a letter from the DuPont Legal Department, DuPont does not license the manufacture of ANY Teflon® film into ANY PTFE Thread Seal Tape, i.e. there is no thread seal product authorized to be licensed to be made with Teflon® brand PTFE. In fact, they maintain there is NO such thing as Teflon® Tape. Please see the link for this unusual marketing position and, a copy of the letter from their trade marks department is available on request. This should be of little concern to the user however. As explained elsewhere on our site, it isn't the BRAND of PTFE that is important but the density. Virtually all PTFE from quality chemical houses are identical in performance.

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P.O.Box 875, 201 Route 59  Hillburn, NY 10931
Phone:  845-357-3699 Fax: 845-357-3677

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