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Tyre Sealant

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FAQs

The required volume scales with tyre size. As a guide: light-truck and 4x4 tyres typically need 500-750ml per tyre; HGV and tractor mid-size tyres need 1.5-3 litres per tyre; large agricultural and earthmover tyres can need 5-15 litres per tyre. Each OKO product page lists the recommended volume by tyre size — check against the sidewall markings on your tyre to confirm. Apply through the valve stem; the sealant distributes around the inside as the wheel rotates.

OKO sealants are water-soluble and washable from the rim and inside the casing during retread or repair, so they don't normally affect tyre warranty or retreadability — but always check the tyre manufacturer's warranty terms for your specific tyre. For wheel balancing, sealant is normally compatible with both static and dynamic balancing; for high-speed tyres, balance the wheel before adding sealant.

Off-road and HGV-grade sealants will typically prevent slow leaks from holes up to 6mm diameter in the tread area — covering the most common thorn, nail, and small-stone punctures. Sidewall punctures and larger holes (above 6mm) are generally outside the sealant's working range and need conventional repair or tyre replacement. The exact rated puncture size is listed on each product page.

Yes for both, but the application differs. For tubeless tyres, the sealant is applied through the valve stem (with the valve core removed) and distributes inside the casing. For tubed tyres, the sealant goes into the tube itself, again through the valve. Tractor and large agricultural tyres are often tubeless with bead-locked rims; HGV tyres are predominantly tubeless. The product page confirms whether the sealant suits tubed, tubeless, or both.

Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the United Kingdom. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will typically arrange collection and replacement at no cost to you. For parts that don't fit your machine, the Fit Guarantee covers a hassle-free return at no cost. For buyer's remorse — you've changed your mind or ordered the wrong item, email us first to obtain a Return Merchandise Number; a restocking fee may apply. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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Off Road/Heavy Duty/HGV

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Within Tyre Sealant, Off-Road / Heavy-Duty / HGV covers the puncture-prevention and tyre-care fluids designed for the larger, higher-load tyres on plant equipment, construction machinery, agricultural tractors, telehandlers, dumpers, HGVs, and similar off-highway and heavy-vehicle applications. These tyres are slow-running, high-load, and expensive to replace — preventing punctures and slow leaks before they take a machine out of service is the central economic case for sealant.

Parts For Machines supplies puncture-preventive sealants, tyre inflation accessories, and the related fittings, gauges, and inflators used in HGV and off-highway tyre maintenance. Parts For Machines is an Authorised Distributor and Seller of OKO across the puncture-prevention and tyre-sealant range. OKO is a UK-developed sealant specialist whose product line covers off-road and HGV-specific formulations sized for the higher fluid volumes and harder-working conditions of large pneumatic tyres.

SIP and Sealey extend the range with tyre inflation and yard-maintenance equipment for HGV and plant applications. Air-seal provides compatible inflation accessories — air chucks, gauges, hose reels, and inflator units — used alongside the sealants in tyre-bay and yard-maintenance operations. Product pages list the rated tyre size or fluid volume per tyre, the application (off-road, heavy-duty, HGV), and the puncture-prevention coverage (typically rated by hole diameter the sealant will plug from inside).

Sealant choice depends on tyre size and operating environment: heavier-load tyres need higher-volume application; off-road conditions with thorn and stone hazards need faster-curing formulations. Bulk and trade pricing is available on multi-tyre and fleet orders; contact the team via WhatsApp 07754288583 for a quote.

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FAQs

The required volume scales with tyre size. As a guide: light-truck and 4x4 tyres typically need 500-750ml per tyre; HGV and tractor mid-size tyres need 1.5-3 litres per tyre; large agricultural and earthmover tyres can need 5-15 litres per tyre. Each OKO product page lists the recommended volume by tyre size — check against the sidewall markings on your tyre to confirm. Apply through the valve stem; the sealant distributes around the inside as the wheel rotates.

OKO sealants are water-soluble and washable from the rim and inside the casing during retread or repair, so they don't normally affect tyre warranty or retreadability — but always check the tyre manufacturer's warranty terms for your specific tyre. For wheel balancing, sealant is normally compatible with both static and dynamic balancing; for high-speed tyres, balance the wheel before adding sealant.

Off-road and HGV-grade sealants will typically prevent slow leaks from holes up to 6mm diameter in the tread area — covering the most common thorn, nail, and small-stone punctures. Sidewall punctures and larger holes (above 6mm) are generally outside the sealant's working range and need conventional repair or tyre replacement. The exact rated puncture size is listed on each product page.

Yes for both, but the application differs. For tubeless tyres, the sealant is applied through the valve stem (with the valve core removed) and distributes inside the casing. For tubed tyres, the sealant goes into the tube itself, again through the valve. Tractor and large agricultural tyres are often tubeless with bead-locked rims; HGV tyres are predominantly tubeless. The product page confirms whether the sealant suits tubed, tubeless, or both.

Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the United Kingdom. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will typically arrange collection and replacement at no cost to you. For parts that don't fit your machine, the Fit Guarantee covers a hassle-free return at no cost. For buyer's remorse — you've changed your mind or ordered the wrong item, email us first to obtain a Return Merchandise Number; a restocking fee may apply. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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