Sealant thoughts

I have been v. impressed with homemade jizz (recipe above).
I've had 1 occasion to use a bacon strip a few weeks ago when a tyre just wouldn't hold. You know the drill it seals, you ride 2 km, then it loses some air, you pop a bit more in , it seals , you ride another 2 km... I kinda forgot i had the bacon strips which is why i persevered.
Tyre was still wet inside but empty when checked and topped up when i got home ( break the bead, chuck in a cup, pump up).
Bike absolutely coated in jizz along all rear facing edges when i cleaned it on weekend. And comes off easier then Orange seal. Apart from the above occasion, i haven't had to stop once since starting with Unicorn Jizz tm.
$33 dollars for 1 Litre latex delivered and some coolant. Still got over 1 litre i made and the remaining 500 ml of latex will make another 2 litres.
 
wkkie said:
The "Juicy Jizz" TM, by @fjohn860 has held my rim together so far...

View attachment 418676

I'll be pulling the tyre off in the next week or so for a full Jizz assessment.
Click to expand...
I ran the concoction from @fjohn860 for about 3 months and about 630 km with no insert. My rim held together well and the wheel didn't explode.

When I took the tyre off there was a single, decent sized booger from the ground rubber, a bit bigger than a 50c coin. There was a good covering / skin on the inside of the tyre.

I did have some corrosion on the anodising of the tubeless valve. I believe @fjohn860 was going to tweak the recipe slightly after this with the corrosion and the rubber booger.
 
I haven't had any issues with the Juicy Jizz recipe and has stayed liquid in the tyre.

I would maybe spring for more bio-glitter and or cornmeal on the next batch as the rubber dust had clumped together in a decent booger last time I had the tyre open. Maybe I just need more demineralised water or PG.

@wkkie tested out some Juicy Jizz but did report some corrosion on the aluminium valve stem.

I haven't seen anything on mine yet.

EDIT: LOL, bit slow on the posting @wkkie beat me to it. Wot he said ⏫
 
fjohn860 said:
I haven't had any issues with the Juicy Jizz recipe and has stayed liquid in the tyre.

I would maybe spring for more bio-glitter and or cornmeal on the next batch as the rubber dust had clumped together in a decent booger last time I had the tyre open. Maybe I just need more demineralised water or PG.

@wkkie tested out some Juicy Jizz but did report some corrosion on the aluminium valve stem.

I haven't seen anything on mine yet.

EDIT: LOL, bit slow on the posting @wkkie beat me to it. Wot he said ⏫
Click to expand...
Cornmeal? Won't that swell and then rot? I've got some wholemeal cous cous in the pantry which will never get eaten, maybe I'll put that in!
Thanks for the replies gents, much appreciated.
 
FFS....Just use a tube and be done with this crap. Unless you're racing the WC XC series, no one needs sealant.
It's expensive, time consuming, fucks everything it touches, you need special tyres/tape/valves and if you get a split, you're fucked anyway!
Next you'll be telling me waxing chains is a good idea too.

Light touch paper and retreat.....
 
komdotkom said:
Cornmeal? Won't that swell and then rot? I've got some wholemeal cous cous in the pantry which will never get eaten, maybe I'll put that in!
Thanks for the replies gents, much appreciated.
Click to expand...
Whoops cornstarch not cornmeal, though i've never tried it.
 
Rusty_68 said:
FFS....Just use a tube and be done with this crap. Unless you're racing the WC XC series, no one needs sealant.
It's expensive, time consuming, fucks everything it touches, you need special tyres/tape/valves and if you get a split, you're fucked anyway!
Next you'll be telling me waxing chains is a good idea too.

Light touch paper and retreat.....
Click to expand...
So. Never ridden in Mildura then. ;)

Tubeless is mandatory around here.
 
Can anyone elaborate on the role of Glycol (either Ethylene or Propylene) in this mix? If we were in 'murica then I get that you wouldn't want it to freeze but aside from that I can't quite understand the role of it. Is there some chemistry magic going on between the latex and glycol which helps homogenise the diluted mixture?

​

 
komdotkom said:
Can anyone elaborate on the role of Glycol (either Ethylene or Propylene) in this mix? If we were in 'murica then I get that you wouldn't want it to freeze but aside from that I can't quite understand the role of it. Is there some chemistry magic going on between the latex and glycol which helps homogenise the diluted mixture?

​

Click to expand...
I'm no expert, but my understanding is to keep the mixture liquid for longer (ie resists evaporation better than the demineralised water).
 
komdotkom said:
Can anyone elaborate on the role of Glycol (either Ethylene or Propylene) in this mix? If we were in 'murica then I get that you wouldn't want it to freeze but aside from that I can't quite understand the role of it. Is there some chemistry magic going on between the latex and glycol which helps homogenise the diluted mixture?

​

Click to expand...
As avove, is a low-volatility polar solvent (relative polarity about 0.8 vs 1 for water)

2 more things it does:
- stabilises the latex emulsion (so helps stay as emulsion longer) may not..
- acts as a latex coalescing agent when it dries.. so makes the solid latex better.

Allegedly

ed: looking through a bunch of patents, they tend to refer to the EG as an anti-freeze additive..

hmm, sealant chemistry might be a holiday project...
 
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if you get bored over Xmas.. 121 pages of discussion here (i've only started reading, hoping it haz sciencing)
www.mtbr.com

Best Tubeless Brew?

After running tubeless three years, I think I have tried all the different sealant types. My unscientific conclusion, if the main goal is flat protection, stan's is the best. Unfortunately, it dries up and thus builds up in the tire. To get at this problem, I have heard all kind of homemade...
www.mtbr.com www.mtbr.com

started going through various SDS's etc.. spreadsheet boredom.
most components are non-haz, but below are the listed bits.
will update as more components found, but assume must have rubber chunks unless other noted (cellulose/mica).

Commercial
Stans: natural Latex (10-25%), Propylene Glycol, Glycerine.
Joes: Propylene Glycol 10-15%, ammonia smell. (latex?)
Orange: ammonia smell (latex?)
Mucoff road n gravel: says no latex, but has "carboxylated NBR latex" stuff 40% (effectively latex) (CAS# 9010-81-5), Propylene Glycol 20%, water 30%, MICA 10% (real mica instead of plastic glitter)
Squirt: Latex 15-20%, Propylene Glycol 20-30%, water 40-50%
Supagard: Propylene Glycol 20-40%
Finish line FiberLink Latex-Free: Propylene Glycol 50%

another mucoff: Ethylene glycol 10%, Bronopol <0.5% (antimicrobial?), D-limonene <0.2% (for fragrance?)
Silca: rubber 10-15%, Bronopol <0.25%
OKO magic milk: Ethylene glycol <10%, Bronopol <0.2% (antimicrobial?), B-alanine <0.5% (amino acid????)

Slime: Glycerine 40%, cellulose 5% (fibres?) ( latex?, just carrier and fibres? tubless version also chunks?)
Marathon (car sealant?): Ethylene glycol 35-45%, water 45-55%, rubber <5%, cellulose <2% (latex?, just carrier and fibres/chunks?)

a different type with PU and Rosin
Reserve wheels: water 22%, water based polyurethane 30%, ROSIN Phenolic Water Based Dispersion 10%, Propylene Glycol 28%, "powder" 10%

DIY types
Fjohns Juicy Jizz(TM): 27% Barnes dip latex, 25% Propylene Glycol, 48% water (including the diluted antifreeze), glitter and rubber

Boyracer Jizz: 500mls latex, ethylene glycol, diluted 1:5? Rubber bits, bio-glitter various and fuel line cordage, also chopped up a bit of dog hair.

SummitFever Jizz: 26% latex, 46% water, 8% windex (ammonia), 21% SLIME
= 26% latex, about 65% water, 8% glycerin.
(note windex original (ingredients here) has ammonia, but also ethylene glycol n-hexyl ether.. which seems to be an emulsifier, and pH is 10.7 which might help latex stability as well??)


"Wadesters Secret Sauce" (2015?) : 20% latex mold builder, 20% Slime, 10% ammonia, 10% water, 40% propylene glycol
2004 version: 20% Latex mold builder, 20% Slime tubeless, 20% cheap antifreeze (EG, no additives), 40% water

notes:
cellulose/fibres.. wonder if clothes dryer lint may be long enough? kitchen paper towel dissolved in metho?
PG seems to be the working fluid to help transport the rest, and reduce drying, but mixing directly with latex = coagulates?
BARNES Liquid/Dip latex is thinner than brush/mold-builder latex, both are pH 10.x with ammonia in it.

someone added water to dried up sealant in tyre to make it work again for a small leak? (dunno about dissolving boogers)
 
Last edited:
oldcorollas said:
if you get bored over Xmas.. 121 pages of discussion here (i've only started reading, hoping it haz sciencing)
www.mtbr.com

Best Tubeless Brew?

After running tubeless three years, I think I have tried all the different sealant types. My unscientific conclusion, if the main goal is flat protection, stan's is the best. Unfortunately, it dries up and thus builds up in the tire. To get at this problem, I have heard all kind of homemade...
www.mtbr.com www.mtbr.com

started going through various SDS's etc.. spreadsheet boredom.
most components are non-haz, but below are the listed bits.
will update as more components found, but assume must have rubber chunks unless other noted (cellulose/mica).

Commercial
Stans: natural Latex (10-25%), Propylene Glycol, Glycerine.
Joes: Propylene Glycol 10-15%, ammonia smell. (latex?)
Orange: ammonia smell (latex?)
Mucoff road n gravel: says no latex, but has "carboxylated NBR latex" stuff 40% (effectively latex) (CAS# 9010-81-5), Propylene Glycol 20%, water 30%, MICA 10% (real mica instead of plastic glitter)
Squirt: Latex 15-20%, Propylene Glycol 20-30%, water 40-50%
Supagard: Propylene Glycol 20-40%
Finish line FiberLink Latex-Free: Propylene Glycol 50%

another mucoff: Ethylene glycol 10%, Bronopol <0.5% (antimicrobial?), D-limonene <0.2% (for fragrance?)
Silca: rubber 10-15%, Bronopol <0.25%
OKO magic milk: Ethylene glycol <10%, Bronopol <0.2% (antimicrobial?), B-alanine <0.5% (amino acid????)

Slime: Glycerine 40%, cellulose 5% (fibres?) ( latex?, just carrier and fibres? tubless version also chunks?)
Marathon (car sealant?): Ethylene glycol 35-45%, water 45-55%, rubber <5%, cellulose <2% (latex?, just carrier and fibres/chunks?)

a different type with PU and Rosin
Reserve wheels: water 22%, water based polyurethane 30%, ROSIN Phenolic Water Based Dispersion 10%, Propylene Glycol 28%, "powder" 10%

DIY types
Fjohns Juicy Jizz(TM): 27% Barnes dip latex, 25% Propylene Glycol, 48% water (including the diluted antifreeze), glitter and rubber

Boyracer Jizz: 500mls latex, ethylenbe glycol, diluted 1:5? Rubber bits ,bio-glitter various and fuel line cordage, also chopped up a bit of dog hair.

SummitFever Jizz: 26% latex, 46% water, 8% windex (ammonia), 21% SLIME
= 26% latex, about 65% water, 8% glycerin.
(note windex original (ingredients here) has ammonia, but also ethylene glycol n-hexyl ether.. which seems to be an emulsifier, and pH is 10.7 which might help latex stability as well??)


"Wadesters Secret Sauce" (2015?) : 20% latex mold builder, 20% Slime, 10% ammonia, 10% water, 40% propylene glycol
2004 version: 20% Latex mold builder, 20% Slime tubeless, 20% cheap antifreeze (EG, no additives), 40% water

notes:
cellulose/fibres.. wonder if clothes dryer lint may be long enough? kitchen paper towel dissolved in metho?
PG seems to be the working fluid to help transport the rest, and reduce drying, but mixing directly with latex = coagulates?
BARNES Liquid/Dip latex is thinner than brush/mold-builder latex, both are pH 10.x with ammonia in it.

someone added water to dried up sealant in tyre to make it work again for a small leak? (dunno about dissolving boogers)
Click to expand...
 
I made some of this last week, seems to do the job.
500ML of latex from Barnes
Glitter from AliExpress
Rubber crumb from a supplier of ours
Cheapest coolant from Burson about 1200ML

Might be a bit runny, may add more latex but it looks and smells like the real thing.
 
My initial thoughts were the same ...too 'watery'. But it works. well done for committing. Next, chainlube, then home brewed brake fluid, then..
 
fjohn860 said:
Komdotkum™️
Click to expand...
I can report that this jizz works a treat, at this very early stage I'm going to say it's better than any commercially available sealant I've used. I've had a couple of decent rock holes and this has done an excellent job of sealing them up without needing any patches or strips.
I suspect that's due to a few things:
  • Latex rich mixture because I'm not trying to make a dollar out of this so can make it thicker unlike Stans&Co who are no doubt making it as lean as possible
  • Range of aggregate sizes helps to plug the holes
  • Proper rubber crumb doesn't stay suspended in the bottle very well, so I chuck a tablespoon into the tyre (of rubber, not a spoon) and I reckon that helps
In summary, why have I been getting penetrated in the wallet by Stan and his mates for so long? Should have done this years ago. Or run tubes and no dropper....
 
@komdotkom when you want to start elevating your 'jizz' game, I'd be very happy to throw you some cash for a bottle or two!

I have infinite PTSD from the Muc Off stuff I was using
 
Yeah, that Muc Off stuff is rubbish, I got given a bottle years ago and had nothing but trouble with it.
I'll have to see my supplier and get some more rubber crumb before I make any more but it's super easy you can easily make it yourself. I'll get a decent amount of crumb off him so sing out if you need any, he won't charge me for it.
 
komdotkom said:
Yeah, that Muc Off stuff is rubbish, I got given a bottle years ago and had nothing but trouble with it.
I'll have to see my supplier and get some more rubber crumb before I make any more but it's super easy you can easily make it yourself. I'll get a decent amount of crumb off him so sing out if you need any, he won't charge me for it.
Click to expand...
Have you found the rubber crumb clumps together in the tyre and forms impressive boogers?

With was my experience with the rubber particles I was making up. It may have been because the particle size of mine is fairly small...
 
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