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

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

Part Number: LT37467
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$9.62
Retail:$12.99
You Save: 26%
Lubricants Sealants Adhesives
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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 etrailer.com.
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  • Reviews (199)
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Loctite Lubricants Sealants Adhesives - LT37467

  • Sealant
  • Gasket Maker
  • Loctite
  • 2.7 oz

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.


Features:

  • 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


Specs:

  • 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





Customer Satisfaction Score:

Ratings & Reviews

4.8

199 reviews
Review sort icon
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.

by:

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



by:

I assume it's working well. I used it to install the block warmer on my truck. No issues.



by:

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



by:

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



by:

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



by:

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



by:

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



by:

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



by:

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.



by:

Fast shipping, installation was easy with the video instructions. Took me about
2 hour to complete with no problems. Great hitch.



by:

Worked well for the ares I needed to use this product, looks like it will last a long time and creates a good seal where I needed it.



by:

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.



by:

Refer to prior review

Bo profile picture

Bo

4/23/2025

This item was great for rear sealing the two grommets that had to be cut to install the wiring harness



by:

Shipped very quickly. Communicative, friendly seller. Thank you!



by:

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.



by:

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. profile picture

Ken S.

3/5/2017

Its has held up, no leaks. No problems



by:

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. profile picture

Jeff A.

7/24/2016

No problems whatsoever. Great stuff!



by:

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

Ivanb profile picture

Ivanb

6/9/2017

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



by:

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. profile picture

Ray B.

10/21/2016

Still working great



by:

Excellent service, price and delivery t ime!



by:

Good gasket maker.



by:

Volume proved was optimal.



by:

Catastrophique!

La prise de connexion
n'est PAS en silicone.
Résultat : elle a fondu en 5 minutes : C'est scandaleux. Produit de mauvaise qualité et DANGEREUX car j'aurais pu mettre le feu à ma voiture.

Je demande un remboursement ou un nouveau produit.



by:

Excellent product, fair price. Would buy from again.



by:

You say the Gray Water fitting slides over the Gray Water line, but how does the Black water fitting attach to the elbow, with a 3" piece of ABS pipe or does 3" fitting slide into the elbow?

Kate F. profile picture
Etrailer Expert

Kate F.

11/19/2025

Great question Fred, happy to clear that up =) For the gray water connection, you’re correct, that fitting slides over the gray water line. For the black water side, the 3" elbow typically has a hub (female) end that the 3" ABS pipe slides into. You’ll glue the pipe into the hub using ABS solvent cement. Then, the other end of that short ABS pipe piece connects to the black water termination fitting (which is also a hub fitting).


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