Commercial tyre sealant is a gel that sits inside the tyre of a truck, bus, tractor or light commercial vehicle and plugs small punctures as they happen, so the vehicle keeps running. For a fleet, that means fewer roadside stops for nail and thorn punctures. This guide explains how it works, where it helps, where it does not, and how to choose.
What commercial tyre sealant does
Polycheme sealant is not a coating on the outside of the tyre. It is a gel that spreads across the inner tread. When a nail or thorn makes a hole, air pressure pushes the sealant into the hole and plugs it from inside. You can read the basics on our how tyre sealant works page.Polycheme sealant works in tube-type and tubeless tyres. It is built for punctures in the tread, up to 6 mm, and stays active inside the tyre for 8 to 12 months under normal use.Why fleets look at sealant
A puncture on a loaded truck is not a small problem. The vehicle stops, often far from a workshop. The driver waits. The trip runs late. On Indian highways and at construction and mining sites, nails, wire and thorns are common.A sealant does not remove every tyre problem. It reduces one of the most frequent ones: the small tread puncture. Fleet owners usually care about three things.- Fewer roadside stops for small punctures.
- Less waiting for a mechanic or a tyre van.
- Steadier running because the tyre loses air slowly or not at all after a small puncture.
Which commercial vehicles it is made for
Polycheme has sealants for different vehicle groups. Pick the page for your vehicle:- Tyre sealant for trucks, buses and tractors, including the Brightstone 900 ml.
- Tyre sealant for light commercial vehicles, including the Diamond 900 ml.
- Tyre sealant for auto rickshaws and three-wheelers.
How to choose commercial tyre sealant
1. Match it to the vehicle
Choose the product made for your vehicle type. A heavy truck tyre and a three-wheeler tyre are very different in size and load. Each Polycheme product page says which vehicles it is for.2. Check your tyre type
Polycheme sealant works with tube and tubeless tyres. Say which you run when you ask for advice.3. Know the dose
The amount of sealant depends on tyre size. Always follow the label on the pack.4. Start with a few vehicles
Most fleets try it on a few vehicles first and compare puncture stops over a few months. That gives you your own numbers instead of someone else’s claim.What sealant cannot fix
Be clear about the limits. Sealant is for small punctures in the tread. It does not fix:- Cuts or tears in the sidewall.
- Large holes beyond the stated 6 mm.
- Worn-out or damaged tyres.
- Wrong pressure, overloading or poor alignment.
A simple way to run a trial
- Pick three to five vehicles on similar routes.
- Note punctures and roadside stops per vehicle for the last few months.
- Fit the sealant as per the label.
- Track the same numbers for the next few months.
- Compare, and decide on the rest of the fleet.
Buying for a larger fleet
If you run many vehicles or supply tyre shops, you may want to buy in cartons. Polycheme sells in cartons for trade buyers. See the distributors page for how bulk buying works.Questions to ask before you buy
Before you fit any sealant on a fleet, ask the seller a few plain questions. Is it made for your vehicle type? Does it work with the tyres you run, tube or tubeless? What puncture size does it cover, and what does it not cover? How long does it stay active inside the tyre? Does the pack tell you how much to use per tyre? A good seller answers these without hype.Where small punctures hurt most
Think about your own routes. Long highway stretches mean a puncture can leave a loaded vehicle waiting a long time for help. City and short-haul routes mean more nails and wire from construction and waste. Tractors work on farm tracks with thorns and stubble. Light commercial vehicles and three-wheelers do many stops a day, so every lost hour costs a delivery. Look at where your vehicles lose time to punctures today, and start there.Keep your normal tyre care
A sealant works best on tyres that are looked after. Keep checking pressure, tread depth, wheel alignment and load. Rotate tyres as your workshop advises. Replace tyres that are worn out or damaged. When a puncture is sealed, get the tyre looked at on your next scheduled stop so a workshop can confirm it is safe to continue.Common mistakes fleets make
- Treating sealant as a cure-all. It handles small tread punctures. It does not fix damaged or worn tyres.
- Skipping pressure checks. A well-inflated tyre picks up fewer punctures and wears better.
- Not keeping records. Without a log of punctures and stops, you cannot tell if anything is working.
- Mixing products. Use one sealant per tyre as the label advises, and ask before adding a different product on top of an old one.
- Ignoring the driver. Tell drivers what is fitted and what to do after a puncture, so they report it and get the tyre checked.