The Ultimate Tubeless Sealant and Injectors

We've had many questions about tire sealant, and Josh has shown us why we use the pour-in method to apply the Ultimate Tubeless Tire Sealant.

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Founded in Milan in 1917 and now based in Indianapolis, SILCA is renowned for cycling passion. Led by cycling industry leader, Josh Poertner, the brand has expanded from the iconic SuperPista pump to a full range of high-end cycling tools and gear, collaborating with UCI World Tour teams to enhance cycling performance. SILCA combines tradition with innovation, inspiring cyclists to enjoy both riding and maintenance.

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Created by SILCA
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[PsyKeks]

My combinations of tires and rims and skill level often make installing the tire quite the hassle already. I am a bit anxious, how it will go when I try to add sealent into the tire, but I will give it a try. I think, I would really appreciate if a two part mixture was available, where I can add all the liquid after installing the tire. Also it's a good thing, I can also use the replenisher as a standalone sealant in tubes in case of a puncture with one of my few remaining tubed bikes. - Although for that benefit I probably can't use TPU tubes, but I can use thinner tires and tubes, if I can quickly "patch" them with sealant. 🙂

[projekctx]

I’m lacking one information regarding adding the replenisher. If I have approx 90-100ml of sealant in the tire, how much replenisher should I be adding, those every 3-4 months?

[ellerybice]

Does this sealant also work in tubes for protection from goat heads? 🤷🏼‍♂️

[Thomas-fyyc]

I’ve been running tubeless for about 4 years with various sealants, usually Stans. I inject it in via the value stem without the core using a 40cc syringe, easy as pie.
The SILCA stuff clogged up the syringe as soon as I started sucking it up. Tried a couple times more and realized that if it clogged up the syringe to fast, any hole from a puncture would do the same.
Good job. A little pain in the ass to setup but definitely more piece of mind, especially on those hard to remove road bike tires.

[Simbostyle]

Just a quick query that I don't think has been asked or discussed, when releasing air to deflate and remove an old tyre for example, will the sealant block the valve core? I read that adding some oil based lube to the valve core helps stop the sealant sticking, but will it stop the sealant for blocking the rest of the valve when deflating? Is it likely that if you left the wheel over night with the valve at the 4 o'clock position, the sealant drains to the bottom of the tyre, and not foam up and block the valve as you deflate?

[LTBlightthebeam]

Some questions I have:

1. What is the specified diameter of the carbon fiber particles in suspension?
2. What is the theoretical orifice size that it'll plug up at a given pressure?
3. Is it compatible with your competitor's sealants? Would I need to remove all existing sealant before using this product?

Awesome job Josh. You're relentless in your pursuit of optimizing bicycle products in an eco conscious way. Way to go!

[DavidWard]

3 months after installing, I'm ready to add replenisher. Oh, the sealant has blocked the valve and I can't deflate the tyre to be able to add replenisher 😃

A good problem to have though.

[martinextejt]

Bought the large size of the replenisher. no way to inject that stuff without buying an additional injector also no directions for how much to use for dummies like me on the label.

[morrisizing]

Sounds great though I have always hated putting sealant in before fully mounting the tyre. OK if the tyre mounts easily but tight tyres are a nightmare. Particularly if you also run tyre liners which make mounting a bit harder.

[TDZed]

Hey, great sounding product! But what happens when you let the air out of your tire? Sounds like it will clog your valve

[naskofilms]

Sometimes my tires don’t set so easy on the rim. I usually set the tire on the rim first than adding seal trough the core. So if I unbead the tire add sealant and tire won’t set what is my solution?

[imbackinthegame]

How much sealant do i have to use on my 28mm road tires (31mm measured) ?

[doubik]

It's my understanding the the Replenisher is the same formula as the Ultimate sealant sans carbon. If the Ultimate dries up into a clump of latex and carbon, how is adding more latex going to change anything of that ball of latex/carbon?

[Crazycliff]

Is this CO2 friendly or will CO2 freeze up the latex?

[AC-dbek]

I saw that Flatout has kevlar and it lasts for 10 years. What's the difference with SILCA?

[tphongsy]

So the replenisher has no carbon in it correct? It’s just the latex only?

[ThePaulbself]

Transfer to new tire?

I live in SoCal and can ride year round. My back tire only lasts 3 months. Can I take the stuff out of the worn out tire and put into a new tire?

[robertskochinstitut]

I have been reluctant to give the pour in method a try with 26-28mm road tires, but if i can replenish through the valve it will be far less of an ordeal to keep the race tires topped up and ready. Right now it really puts me off when the the race wheels hybernate for a few months and i have to clean and remount everything even though the thread on the tires is still fine. My favourite sealant so far is the one from mavic. 15000km on the front wheel with no flats. I'll still give silca a try.

[bikerjk]

Non-injectable is a deal breaker for me. Pity because it looks like a great product.

[niklasbirksted]

Can it be combined with airliners on road bikes then? Seems like an impossible mix.