Gasoila® Diesel Soft-Set Thread Sealant

Part Number:



Gasoila® Diesel Soft-Set Thread Sealant

No matter how careful you may be using Teflon tape, small shreads can be introduced into the fuel and oil ports. If these small pieces of teflon find their way to your injectors, it can lead to big problems. 
Play it safe and use a paste thread sealant when working with NPT fittings on your diesel engine! 
  • Excellent resistance to gasoline (up to 20% alcohol and petroleum blends), petroleum solvents, kerosene, diesel oil and fuel, propane, butane LPG, cutting oils, ammonia, aliphatic solvents, acids, steam, potable water, compressed air and more.
  • Soft-setting, non-toxic, PTFE paste.
  • Provides a positive seal on pipe threads, joints, fittings, hoses, nozzles, LPG cylinders, pump assemblies, oil burners, hydraulics, compressors, engines, motors, housings, plugs, fuel lines, couplings and more.
  • Use on brass, copper, stainless steel, aluminum, black pipe, tin, galvanized, ABS, CPVC, PVC plastics, nylon, polyethylene, polypropylene, polybutylene and more.
  • NOT for use on oxygen.
  • Remains pliable in cold temperatures.
  • Temperature Range: -100ºF to 600ºF (-74ºC to 318ºC).
  • Pressure Range: To 10,000 psi sealing liquids; to 3,000 psi sealing gases.
  • For use on NPT Threads.
  • Included with your FRx purchase
Write a Review

9 Reviews Hide Reviews Show Reviews

  • 5
    Gasoila Thread Sealant

    Posted by Jeff on Nov 15th 2020

    This stuff is great! If it comes from Riffraff, you know it is!!!

  • 5
    Worked well

    Posted by Aron on Aug 1st 2020

    I used this on the 7.3 fuel crossover. I waited the 24 hours it said it needs to cure. No leaks.

  • 5
    It sealed the threads better then others.

    Posted by John Gibson on Jan 20th 2020

    I used it to install a transfer tank in my new duramax and surely didn’t want any leaks in the bed.

  • 5
    Problem free

    Posted by Jeff on Feb 13th 2018

    Great all way around from the product to the business!

  • 5
    Great product

    Posted by Brett on Sep 5th 2017

    Wasn't sure how much of this stuff to get but 1 packet covered me with 6 fittings with about 1/4-1/2 left over. Sealed all my fittings as designed, no fuel or air leaks.

  • 5
    a must for fittings

    Posted by Scott on Jan 11th 2017

    I used this stuff for my coolant filtration and when I installed new parker sleeves on my fuel lines that go to the filter housing I removed the brass fittings and sealed those. It plainly says it is diesel resistant and works as advertised. I must say with all the stuff I have bought from Clay my truck is in great shape. I love RiffRaff

  • 5
    This stuff work great.

    Posted by Larry I on Jun 23rd 2016

    Very handy multiple use product,a must have around the shop,truck and RV.

  • 5
    Works great and taste good too !

    Posted by Larry I on Jun 7th 2016

    One more quality product from Riffraff.

  • 4
    Better than teflon tape....

    Posted by Unknown on Mar 28th 2016

    I used this sealant on a remote fuel pressure sender on my 6.0L Powerstroke. I had multiple NPT connections for the hose fittings, pressure transducer, and Schrader port, and did not want a leak, or want small pieces of teflon to make it to my injectors. This stuff worked very well. No leaks on the first shot. Its a little runny at first, but does thicken up, but does not completely solidify.