Air‑Seal Tyre Sealant – Heavy‑Duty DIY Kit (4 Litre) Air‑Seal Tyre Sealant is a professional‑grade, pre‑puncture tyre protection system engineered for mixed on‑road and off‑road fleets operating in harsh environments, including construction, landscaping, agriculture, civil works, and industrial sites.
Our smaller packaging options like this 4 Litre pack is suitable for treating all on-road and off-road applications that require smaller quantities of tyre sealant, including motorbikes, cars, 4x4s, trailers, wheelbarrows, ATVs, and ride-on-mowers.
This pre-puncture tyre sealant will perform an instant puncture repair up to 15mm in diameter. One application of Air-Seal® will last the life of the tyre without needing to install additional tyre sealant and the instant puncture repair process occurs within one or two revolutions of the tyre without any noticeable loss of tyre pressure.
As the tyre rotates, centrifugal force spreads the sealant evenly across the inner liner. When a puncture occurs, escaping air pressure instantly drives high‑strength aramid fibres into the damage site. These fibres interlock, bridge, and bond together to form a repair that is stronger and more abrasion‑resistant than the tyre itself, then reinforced by advanced filler particles to create a permanent, airtight seal, usually within 1–2 tyre rotations.
WARNING: Incorrect installation, overfilling, or under-filling of Air‑Seal® may result in tyre imbalance, vibration, or reduced performance. Always follow recommended quantities and installation instructions.











