Thetford RV Toilet Seal Lube and Conditioner – Toilet Seal Lubricant – 24 oz 36663

(10 customer reviews)


Thetford’s RV Toilet Seal Lube & Conditioner is a perfect solution for prolonging the life of your toilet and holding tank seals.

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Thetford RV Toilet Seal Lube and Conditioner is formulated to penetrate the seal, conditioning and preventing it from deteriorating. You can use RV Toilet Seal Lube & Conditioner on RV and marine permanent toilets and on portable toilets.

Toilet Seal Lube & Conditioner prevents waste from sticking, ensures smooth toilet operation, and is petroleum-free.


  • VERSATILITY: Thetford’s RV Toilet Seal Lube & Conditioner works with all permanent or portable toilets found in RVs and boats
  • FUNCTIONALITY: Penetrates the toilet seal, lubricating and conditioning it
  • UTILITY: Helps prevent waste from sticking, ensuring smooth toilet operation
  • CONVENIENCE: Toilet Seal Lube & Conditioner can be used on toilet seals and on holding tank seals
  • SAFETY: The petroleum-free, silicone-based formula is safe on seals, prolonging their life.

From the manufacturer

Thetford RV Toilet Seal Lube and Conditioner

Thetford Toilet Seal Lubricant and Conditioner is specially formulated to penetrate and coat seals for smooth problem-free operation. Other benefits include:

  • Helps prevent sticking
  • Silicone-based formula is safe on toilets and holding tank seals (petroleum based lubricants cause swelling and degradation of rubber seals)
  • RV/Marine compatible


Brand Thetford
Material Silicone
Item Dimensions LxWxH 2.5 x 1.65 x 8.25 inches
Specification Met (unset)
Unit Count 1.0 Count
Number of Items 1

Additional information

Weight 1.65 lbs


10 reviews for Thetford RV Toilet Seal Lube and Conditioner – Toilet Seal Lubricant – 24 oz 36663

  1. Jim T

    Leak stopped. I’m a happy customer 🙂Well this stopped the leaking seal. So we turned off the water pump in the trailer and then held the flush pedal till the water pressure in the line was gone and the water stopped. We then poured about a 1/4 of the bottle in to the toilet and then left it for about 3 days. We had to be away from the trailer so it was a great time to use the Thetford product. It worked great!!! Going to start using this on a regular basis.

  2. Barry Dwernychuk

    Not useful in salt water marine headsI bought this product because I needed something to lubricate the manual Jabsco head in our salt water boat and my preferred product is temporarily unavailable.This stuff did provide some minimal and temporary relief of the squeaking and stiffness while operating the head pump. However, it didn’t last more than a few uses and required a large amount (1/4 of the bottle) to effect that minimal improvement. This stuff is probably better for fresh-water RV systems.

  3. speedturn

    It helpsIt works to swell leaky RV toilet bowl flush slide valves, but you have to use it 2 or 3 times per year

  4. Tbird

    It worked!Two applications and our toilet is again holding water!

  5. Donald Counts

    Restores sealThis product did what I bought it for. The rubber seal on the toilet had gone dry from sitting. I poured a little in the bowl and let it sit overnight and the seal is holding water now and it’s been a month.

  6. Rhonda & Jason LaMar

    It worksIt works. Glad we tried it.

  7. C. Castro

    Worked PerfectThe product worked exactly as advertised! No more issues with a leaking gasket. Easy to use, no mess!

  8. jerry jurgens

    Worksworked as advertised

  9. Carmen B

    PerfectHad a slight leak in my toilet poured some in it set for 10 hours no more troubles it’s been about a month now

  10. matthew

    Fixed leaking toilet sealHelped fix a leaking seal on cassette toilet. Its a thick gel you pour it in and let it sit in the bowl and flush it a few hour later. Its a great product!

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