Would this work for ATF transmission fluid fittings?

It will work on a wide variety of fittings and applications but is designed for use on NPT (pipe) threads, not machined fittings like flare or compression ferrule types; if those are leaking, they need to be replaced.

Will it cause damage to Transmission if used on drain plugs ??

Absolutely not. Used this on T-56 6 Speed fill hole bolt with zero issues

Can this be used on polypropylene fittings with UNF threads?

You can use this on anything that’s threaded. Just allow it fully harden and double check for leaks once it does.

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🔧 Lock it down, seal it tight—never lose grip or leak again!

MESS FREE APPLICATION - Smooth liquid formula replaces tape and pipe dope for a clean, professional finish every time.
UNMATCHED SEAL HOLD - Combines thread sealant and blue thread locker for ultimate leak and loosening protection.
PRESSURE PROOF PERFORMANCE - Secures fittings with an airtight, watertight seal up to 1000 PSI—no leaks, no worries.
EXTREME TEMPERATURE RESILIENCE - Operates flawlessly from freezing -60°F to scorching 300°F without cracking or corrosion.
RAPID CURE HEAVY DUTY STRENGTH - Fast-curing formula handles up to 10,000 PSI—ideal for demanding industrial and automotive uses.

Permatex 57535 Seal and Lock Thread Compound is a high-performance blue thread locker and sealant hybrid that prevents loosening and corrosion on bolts, nuts, and fasteners. It delivers a watertight, airtight seal up to 1000 PSI, cures rapidly to withstand pressures up to 10,000 PSI, and endures extreme temperatures from -60°F to 300°F. Designed for professional and DIY use, it replaces messy tapes and pipe dopes with a clean, reliable liquid formula.

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€ 33.89

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TrustScore 4.5 | 7,300+ reviews

Zainab N.

Fantastic and great service. Shipping was faster than expected.

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Good experience, but the tracking updates could be better.

2 months ago

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Material	Plastic
Brand	Permatex
Style	Compact
Item Weight	0.15 Pounds
Item Dimensions LxWxH	8 x 5 x 0.5 inches
Item Form	Liquid
Color	Blue
Manufacturer	Permatex
Model	Permatex 57535 35 mL Seal and Lock Thread Compound, 1.26 fl. oz
Item Weight	2.4 ounces
Product Dimensions	8 x 5 x 0.5 inches
Country of Origin	USA
Item model number	57535
Manufacturer Part Number	57535
OEM Part Number	57535

Permatex 57535 Seal and Lock Thread Compound,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 35 ml

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