

🔧 Seal it tight, perform right — don’t let leaks steal your spotlight!
Loctite 37482 545 is a 36 ml purple pneumatic/hydraulic thread sealant designed for high-pressure systems. Its particle-free formula prevents contamination and clogging, curing quickly on untreated fasteners. Ideal for hydraulic, brake, transmission, and PTO fittings, it’s OEM-approved and highly rated by professionals for reliable, clean sealing performance.

| ASIN | B003XZB54O |
| Best Sellers Rank | #5,458 in Automotive ( See Top 100 in Automotive ) #22 in Thread Lock Sealers #367 in Oils & Fluids |
| Brand Name | Loctite |
| Color | Purple |
| Compatible Material | Metal |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,001) |
| Global Trade Identification Number | 00079340374829 |
| Included Components | (1) LOCTITE 545 Pneumatic/Hydraulic Pipe Thread Sealant | Purple, 36 ml Bottle |
| Item Dimensions | 6.25 x 2.25 x 1.1 inches |
| Item Form | Liquid |
| Item Type Name | automotive-thread-lock-sealers |
| Item Weight | 1.6 ounces |
| Manufacturer | Loctite |
| Material Type | Sealant |
| Model | 492145 |
| Number of Items | 1 |
| Part Number | 492145 |
| Style Name | Industrial |
| Surface Recommendation | Miscellaneous |
| UPC | 079340374829 |
| Unit Count | 1.21 Fluid Ounces |
| Water Resistance Level | Not Water Resistant |
M**T
Works great.
Worked Great. Stopped a water leak at a pipe fitting that I’d been having problems with.
P**.
Does the job
A couple of drops is all it needs for a perfect seal. No more air leaks from my pneumatic fittings.
A**R
Made what I though impossible come true!
Just got done using the Loctite 545 with primer 7471 (Required with stainless steel) and also used 5452 (Gel Version, No primer required) and they are awesome. What "I" key word "I" as a novice could not do with teflon tape and pipe dope these products were able to. Not only do they seal really well, but they also create a tight bond like other loctite glues. Again, these two products are specifically designed for Pneumatic use. IMOP, they are very expensive and not practical for everyday useI on a job site. I just got tired of taking my airline pipes, cleaning with wire brush and acetone and reassembling/assembling multipule times. I would like
A**R
Compressor repair
I used the Locite 545 to repair an old air compressor. Working well so far.
F**E
good stuff!
works fine to seal fittings of my 6 x 4 bandsaw hydraulic downfeed control piston.
J**I
Locktite 545 perfect
545 omg made all my leaks disappear like magic lol. It's the only thing needed. Maybe a primer if you want it to cure faster. Worth every penny
N**.
Perfect sealant for my methanol fuel lines
I used this Loctite 545 on all the fittings in my methanol fuel line setup for my project, and it has been absolutely flawless. Not a single leak anywhere. It applies clean, seals perfectly, and holds strong even under vibration and pressure. This product gave me total confidence in my fuel system, and I definitely won’t stop using it. If you’re working with methanol or high-performance setups, this sealant is a must-have. Highly recommended!
J**M
Extra peace of mind for brake fittings
I recently had a brake line rupture on an older vehicle that resulted in a potentially fatal near miss. It was a real wakeup call. When I replaced the entire braking system, I decided to pay close attention to every detail and use quality parts. I used this product on every fitting, and unlike Teflon tape, which is arguably an amateur's hack, this is made for the application. Of course, it's for many hydraulic applications, but when a braking system is so critical to your safety, your family's safety, and everyone else's, why mess around? Do it right.
M**M
Tried everything to stop a leaking Fel controller with no lasting effect and was forever replacing O rings. Although pricey I decided to try this Loctite for Hydraulics and it has solved my issues! I am very pleased with this product and highly recommend it.
J**L
Después de darle servicio a mi compresor, no encontraba la manera de que no tuviera fugas de aire. Intente con tanto Teflon como pude, incluso sus variantes industriales pero nada conseguía sellarlo. Probé con este producto, no teniendo muchas expectativas realmente y mi sorpresa fue que ahora no tengo ninguna fuga. Es importante mencionar que si se debe de dejar secar al menos lo que indica el producto (24 horas) aun que por el clima frío lo deje una semana. Lo recomiendo TOTALMENTE.
M**B
Buen producto
B**N
Easy to apply.
D**K
This was recomended by some repair personnel and it worked great for my connections that were leaking using another product. However, this has to sit for 24 hrs to be 100% effective.
Trustpilot
Hace 2 semanas
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