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Loctite RTV 598 High-Performance Silicone Gasket Maker - Black - 2.7-Fl Oz Tube

Loctite RTV 598 High-Performance Silicone Gasket Maker - Black - 2.7-Fl Oz Tube

Item # LT37467
Our Price: $9.01
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Lubricants Sealants Adhesives
Shipping Weight: 0.31 lbs
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This black silicone gasket maker forms a high-quality gasket that seals the space between matched parts to prevent leakage of automotive fluids and gases. It meets manufacturers' specifications for original equipment. Fastest Shipping and Great prices for Loctite RTV 598 High-Performance Silicone Gasket Maker - Black - 2.7-Fl Oz Tube. Read our customer reviews of Loctite lubricants sealants adhesives. Call 1-800-940-8924 for expert service or order your lubricants sealants adhesives part number LT37467 by Loctite online at
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  • Reviews (128)
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Loctite Lubricants Sealants Adhesives - LT37467

  • Sealant
  • Gasket Maker
  • 2.7 oz
  • Loctite

This black silicone gasket maker forms a high-quality gasket that seals the space between matched parts to prevent leakage of automotive fluids and gases. It meets manufacturers' specifications for original equipment.


  • Seals joined parts in automotive systems - prevents leakage of antifreeze, air, oil and transmission fluid
  • Meets manufacturers' warranty requirements
  • Resists oil better than other silicone gasket makers
  • Won't interfere with sensors
  • Won't corrode
  • Resists vibration
  • Made in the USA


  • Quantity: 2.7-fl oz tube (80 mL)
  • Tack-free cure (time required to dry past tacky state): 30 minutes
  • Full cure (time required to reach full set): 24 hours
  • Temperature range (endurance limits of the gasket maker): -75 F to 625 F
  • Ideal gap-filling capacity (gap sizes in which gasket maker performs best): 0.001" to 0.125"
  • Maximum gap-filling capacity (maximum gap size between joined parts): 0.240"

Applications: Valve covers, oil pans, timing covers, water pumps and thermostat housings

Applied as a gel to just one surface of the parts to be joined, silicone gasket maker forms a seal between them, keeping out contaminants. Silicone gasket maker resists oil and shop fluids, vibration, heat, and flexing of parts, replacing many conventional gaskets. Parts joined by this silicone gasket maker can easily be removed. The old gasket material comes off effortlessly, simplifying future disassembly and reassembly.

Because of their ability to flex and compress, silicone gasket makers work better than other kinds of gasket makers when the parts to be joined are made of different materials, which have different rates of expansion and contraction when temperatures change. They also work better than other types of gasket makers on stamped metal parts that can flex and in situations where clearances can be large.

OEM symbol

This product is OEM specified: It is approved to meet specifications of original equipment manufacturers.

491985 Loctite RTV 598 - Black High Performance Silicone

Alternate part number: 37467

Installation Details LT37467 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Loctite RTV 598 High-Performance Silicone Gasket Maker - Black - 2.7-Fl Oz Tube - LT37467

Average Customer Rating:  4.8 out of 5 stars   (127 Customer Reviews)

This black silicone gasket maker forms a high-quality gasket that seals the space between matched parts to prevent leakage of automotive fluids and gases. It meets manufacturers' specifications for original equipment.


This went on without a problem on a 2022 Subaru Outback thankfully providing the built-in wiring harness that is located under the right side rear trim piece, I did not need to remove. I used 3M Dual Lock in case the control unit needs to be easily moved in the future. Using this for a OneUp Bike Rack and their license plate and LED light bar.


Works great, have used it many times this past year to tow a small trailer and sailboat with my 2013 Chevy Volt. Seems to be very safe and secure so far.


Worked great


Great product and the usual excellent service from etrailer !!!!


Originally ordered to close extra holes in a Yakima Rocket Box that required new hardware. Does the job.

etrailer provides excellent information, support and customer service. I wish every online vendor was close.


The trailer hitch wiring kit arrived on time and complete. The YouTube video for my Cadillac SRX was invaluable in helping me to complete the installation and avoid problems.

Ray B.


Still working great


Bearing buddy is still on the trailer and the wheel is still turning.


Used this to make a gasket/seal around a stop/turn signal light I added to my toad vehicle. No problem, worked great.

Ken S.


Its has held up, no leaks. No problems


I used this to seal the installation holes on my hitch mount. The stuff is very easy to work with and sets up nicely. Work great and provides a great finished seal.
Etrailer had the best price I could find also.

Jeff A.


No problems whatsoever. Great stuff!


LocTite black colour gasket like silicone is excellent product overall. Perfectly dose what it was designed for. Thanks ETrailer.



After a year I am still very happy with its performance, no problems at all.


Used during 2012 VW Jetta TDI sedan hitch and wiring installation (per video recommendation).


Works as advertised. Pretty simple install. As usual great quality product(s) from etrailer


easy install, works great!


The carrier performs just as it was designed. Putting the rubber sleeves on was difficult and the sealer has already pealed of . Before I use it again I will put silicone caulk on the joints


i used this product when I put together my cargo carrier. I put it on the bolts before I screwed on the nuts for added insurance to keep the carrier nice and solid.


works well, be careful on the pressure you apply. I applied too much pressure (i was rushing it) and it went out the back end... complete user error but be warned.

Good product.


Saw it used in the video to install tail lights. Worked great and sealed the light assembly. Easy to use.


This is the perfect RTV for way covers on CNC machines. They seal the coolant out and yet you can get the covers back off without damaging them.


This is the best RTV on the market for CNC way covers. It seals the coolant out and doesn't bend up the guards when removing them.
Thank you!!!!


Professional installed. Working well after 1 year. Expect it to keep working.


I used this to seal the hole I had to drill in my car when installing my hitch to keep water and exhaust out of the cabin, it dried quickly and created a good seal to keep stuff out


Seems to be doing it's job just fine, and helped with the installation of the rack


This is the BEST RTV ever.
FAST delivery.
PERFECT transaction!
Thank you for a job well done!!


Hasn’t cracked or leaked in a year. Thumbs up!


Did not work to seal up my failing brake light gasket. Also very smelly in spite of being labeled as "low odor"

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