Silca Ultimate Tubeless Sealant

[DDX]

Not sure about the carbon fibers parts, I alway learned you had to wear face masks when you cut your carbon fibre fork.
So not sure how safe this sealant is ?

[FlatlandClimber]

Not sure about the carbon fibers parts, I alway learned you had to wear face masks when you cut your carbon fibre fork.
So not sure how safe this sealant is ?

My guess is these parts are significantly larger, than the very fine particles, that'd settle in your lungs when cutting up a carbon fork or seatpost.
If the parts are 1mm or larger, I don't think they are a risk to breathe in, especially when drenched in latex.

[wheelsONfire]

Well, i have used inner tubes and tubeless. To be honest, the most secure set up i have used is inner tubes and then use Tufo if a punture appears.
I've had several flats with sealant and tubeless which just doesn't get repaired. Even with dynaplug!
I don't ask for some shitty comments about this since i just mention what has been the best option for me.

I respect your opinion, but if a puncture still leaks after inserting a Dynaplug, just fire in another one. Also, if you're not using a road proven sealant (i.e. Orange Seal), then your tubeless experience will be compromised.

I have used many brands and Orange is probably my favorite. However, if you wait to long to change sealant, i don't like the goop it turns to.
For road i think i will stick to using inner tubes.

[ridgick]

I'll be trying the new Silca with the hope that it will seal at a higher pressure than the competitors that use smaller particles. I've tried almost everything out there and so far I'm still a fan of Stans when it's newish. Orange seal only seems to work for me once the pressure gets down below 40-30psi. Still enough pressure to get me home but not enough to continue racing on.

[ms6073]

I recently got a flat (rear tire at 80 psi, 700x29) and there was a lot of Orange Seal all over the back of my bike. Pressure didn't come down much to notice as I finished the ride without noticing that I had a flat though.

Since going tubeless some 4-years back, 3 of which would not have even been noticed had it not been for the Orange Seal Endurance residue on the underside of the downtube or back of the seat tube at the end of the ride. I was running 700x28 and 700x30 Schwalbe tires in these cases and was running ~61F/65R psi and pressure dropped maybe 1-2 psi. In all cases, I used the syringe I use to inject the sealant to 'suck it out' to check the level and then refreshed the sealant but can't say whether the lower volume of sealant was due to the leak being sealed or normal evaporation.

[MikeD]

I recently got a flat (rear tire at 80 psi, 700x29) and there was a lot of Orange Seal all over the back of my bike. Pressure didn't come down much to notice as I finished the ride without noticing that I had a flat though.

Since going tubeless some 4-years back, 3 of which would not have even been noticed had it not been for the Orange Seal Endurance residue on the underside of the downtube or back of the seat tube at the end of the ride. I was running 700x28 and 700x30 Schwalbe tires in these cases and was running ~61F/65R psi and pressure dropped maybe 1-2 psi. In all cases, I used the syringe I use to inject the sealant to 'suck it out' to check the level and then refreshed the sealant but can't say whether the lower volume of sealant was due to the leak being sealed or normal evaporation.

Well, I checked the level of the front tire too by sucking the sealant out and there was a lot more in there, so I lost about an ounce in the rear. I've only ever used Orange Seal endurance and regular too. I've had sealing issues with the endurance. I recently used Milkit but can't comment on its effectiveness yet as its on a hardly ridden mountain bike, but the tires aired up just fine. But, the advantage of Milkit is you don't have to shake the bottle and it's CO2 compatible. OS foams up when shaken, so it's hard to measure how much to install by volume.

[Sulliesbrew]

I am looking forward to trying the new sealant. I've been running orange seal sub zero for years now without issue. Never had a flat on a ride (knock on wood), seen a couple people struggle with the whole road tubeless things but I think that is a combo of being a ludite + not an analytical approach to the install/checking tires halfway regularly.

WRT slow leaks, my trainer bike got a freshening of sealant last spring for crit racing then put on the trainer, I need to add air to the front tire monthly to keep it road riding firm, every two months if I let it go pretty much flat. That is on corsa speeds.

[Hexsense]

Not sure about the carbon fibers parts, I alway learned you had to wear face masks when you cut your carbon fibre fork.
So not sure how safe this sealant is ?

"carbon" part is not dangerous. It's the "Fiber" (resin, glue mix, clear coat, etc.) that stick with the carbon that is dangerous.
This type of carbon Silca use lost most of those stuff during the recycle process. Josh claims it's just one heating step away from becoming activated carbon. The stuff people eat to cure diarrhoea.

[TobinHatesYou]

I still have the tip of a #2 pencil in my palm from 35 years ago. Carbon is mostly harmless. Char on your food is mostly carbon.

[bikeboy1tr]

Haha yeah but whats carbon without the fibre. Carbon on its own is not very tastey.

[bikeboy1tr]

Sorry I couldnt resist.

[Butcher]

I'm not a doctor, but grinding carbon fiber is not good for the lungs. I suspect the resins wouldn't be either, but I thought the carbon was worst.

[MikeD]

From watching the video, it looks like it seals faster than Orange Seal. I recently got a flat (rear tire at 80 psi, 700x29) and there was a lot of Orange Seal all over the back of my bike. Pressure didn't come down much to notice as I finished the ride without noticing that I had a flat though.

Though it was a gravel tire at 40psi and a round puncture right in the centerline of the tread cap. I’d love to see the demo repeated with a popular 25mm tire with a puncture at the shoulder of the sidewall/tread cap…starting from 85psi.

I'd like to see that test too.

[robeambro]

From watching the video, it looks like it seals faster than Orange Seal. I recently got a flat (rear tire at 80 psi, 700x29) and there was a lot of Orange Seal all over the back of my bike. Pressure didn't come down much to notice as I finished the ride without noticing that I had a flat though.

Though it was a gravel tire at 40psi and a round puncture right in the centerline of the tread cap. I’d love to see the demo repeated with a popular 25mm tire with a puncture at the shoulder of the sidewall/tread cap…starting from 85psi.

I'd like to see that test too.

Or better, a livestream with say 5-10 attempts. I don't care for a video that may well be a cherry-picked successful seal, I want to see it happen repeatedly and with some degree of consistency.
Not that I don't trust Josh, but it would go a long way in giving me some confidence.

[MikeD]

From watching the video, it looks like it seals faster than Orange Seal. I recently got a flat (rear tire at 80 psi, 700x29) and there was a lot of Orange Seal all over the back of my bike. Pressure didn't come down much to notice as I finished the ride without noticing that I had a flat though.

Though it was a gravel tire at 40psi and a round puncture right in the centerline of the tread cap. I’d love to see the demo repeated with a popular 25mm tire with a puncture at the shoulder of the sidewall/tread cap…starting from 85psi.

I'd like to see that test too.

Or better, a livestream with say 5-10 attempts. I don't care for a video that may well be a cherry-picked successful seal, I want to see it happen repeatedly and with some degree of consistency.
Not that I don't trust Josh, but it would go a long way in giving me some confidence.

I don't like what looks like cherry picking either. I want to see a high pressure road tire punctured. One time, I went into the LBS when sealants were just becoming popular. I saw a demonstration where the shop employee punctured a mountain bike tire with an awl, and it sealed instantly (using Stan's); apparently a easy test with fresh sealant and a low pressure tire.

However, Josh impresses me because he does the engineering research and testing to understand how to make a better product and his stuff just works. Until this time, I didn't think solid particles in the sealant made any difference, but he explains why those particles aren't mobile and don't make their way to the puncture.