PTFE tape and PTFE paste are two form factors of a similar polymer that perform the same function. There are various extents you can go to for building a setup, and can prop some on a pedestal over others, if you want... for fuel lines: -AN lines, hard tubing, nylon tubing, injection hose... Multiple things to use that all can perform the function correctly, be taken care to install properly, and so on. Some will swear by a certain version they've fully bought inti from their personal use, but negating another version of something purpose-made for the same function isn't in good faith. Hence, insinuating that teflon tape is a neanderthal's rock, compared to a modern person's use of a hammer is a false dichotomy that is trying to, demean a valid method for your purposes.
Thread seal
tape (also known as
PTFE tape,
Teflon tape, or plumber's
tape) is a polytetrafluoroethylene (
PTFE) film
tapecommonly used in plumbing for sealing pipe threads. ... Thread seal
tape lubricates allowing for a deeper seating of the threads, and it helps prevent the threads from seizing when being unscrewed.
Permatex Aviation Form-A-Gasket Sealant Liquid is a slow-drying, non-hardening sealant. Ideal for close fitting machined surface. Approved for use in aviation as well as automotive applications. Helps seal cut gaskets. Resists gasoline, oil, anti-freeze and axle fluids.
LOCTITE 567 is an off-white, UL approved, low disassembly strength methacrylate thread sealant, ideal for sealing coarse threads up to M80/R3”.
LOCTITE® 567 is an off-white, low strength, thixotropic methacrylate thread sealant. It cures in the absence of air and by contact with metals when confined within threads up to M80/R3”. It is best suited for use on coarse metal threads and its breakaway torque rating is 1.7Nm. Viscosity is 280,000 - 800,000 mPa·s and service temperature -55 to +150ºC.
-Provides an instant low pressure seal
-Doesn’t creep, shrink or block systems
-Single component - clean and easy to apply
-Thixotropic and high/very high viscosity
-UL approved
- Solvent-based sealing compounds can shrink during cure as solvents evaporate. Fittings must be re-torqued to minimize voids. They lock the assembly by a combination of friction and deformation.
- PTFE tape lubricates in off direction, allowing fittings to loosen under dynamic loads and resulting in loss of clamping force and leakage. Dynamic loads may accelerate creep, causing leakage over time. The lubricating effect of PTFE frequently results in over-tightening of fasteners, adding stress or causing breakage of parts. Application requires good professional skills to avoid stressing fittings or castings.
- Hemp and paste are slow to apply, are messy to assemble, and interfere with the torque needed to obtain the correct pre-stress. These can require re-work to achieve a 100% seal of the assembly.
These are all reasons why Teflon tape is a rock. Permatex for intake bolts, Loctite for head bolts/studs.