December 28, 2015

Homebrew Sealant

UPDATE: I modified the below recipe a couple months ago based on a Tucson friend's 7 year experience. I've now used up my first batch and can say I agree. Simple is better. So, here you go:

Mix 3 parts water to 1 part latex mold builder. Same as I use below. That's it. Still makes 64oz of sealant at a fraction the popular brands cost. Don't forget to look for a Michael's coupon for the latex.


I've been running a tubeless setup for about 5 years now and its worked very well for me. About 3 years ago I switched to a homebrew sealant modification I found online. I had been using Stan's sealant very successfully, but that stuff can be expensive.

Quite a few people have asked me about the homebrew, so I figured I'd put it here for future reference. It's really quite simple, works just as good as Stan's for about 1/3 the cost.

Keep in mind, I'm re-using my 16oz black Stan's bottle & a few of the 2oz Stan's bottles for ease of use.

First thing you'll need are a few supplies. I splurged at the Dollar store.

Broke the bank with $3 worth of supplies.
  • 64oz container with a large mouth opening.
  • Funnels
  • Measuring cup
  • Paint stick
Here are the ingredients:
3 ingredients.
  • 1 16oz bottle of Slime sealant
  • 1 16oz container of Latex Mold Builder
  • 1 Gallon 50/50 anti-freeze (You'll use 32oz for a batch)
Most bike shops, REI, sporting goods stores will carry the Slime. Obviously, any auto parts store for the anti-freeze and Michaels craft stores for the Latex Mold Builder.
Plenty of these available too, check the weekly circular for 40-50% off coupons.
Combine the 16oz Slime, 16oz Latex Mold Builder and 32oz of anti-freeze in the 64oz container. I use a bit of the anti-freeze swished around in the Slime & Latex containers to get as much of the material out as possible. Mix well. DONE.
In goes the Slime.
I mixed some of the anti-freeze, then added the latex.
64oz of fresh sealant ready to go.
Transfer it to a more usable container.
Store in a cool dark place and it will stay liquid for months. I've had it sit around for almost a year without issue. Use a scoop & funnel to transfer it to an easier to use bottle.

A batch of sealant typically lasts me about a year. There are plenty of homebrew variations out on the interwebs, this just happens to be one I found and have use with great results over the past couple of years.


  1. Still using the top recipe? I'm in Tucson and have lost my most recent recipe...looking to recreate it somehow.