K-Seal International

What K-Seal International does

K-Seal International Ltd. is a privately held UK-based manufacturer of automotive coolant leak repair products, headquartered in Lewes, East Sussex, and operating under parent entity Kalimex. The company sells a proprietary formulation designed to permanently seal coolant leaks in water-cooled engines — covering head gaskets, engine blocks, radiators, heater cores, water pump casings, intake manifolds and freeze plugs — across more than 25 countries. Its core customers are individual vehicle owners seeking a DIY repair, professional mechanics offering customers a lower-cost alternative to workshop teardowns, and commercial fleet operators of HGVs and heavy plant equipment. The company has sold over 13 million bottles of its products worldwide, is privately held with no disclosed funding rounds, no M&A activity, and no SaaS or subscription component to its model.

The core K-Seal technology combines ceramic microfibres and copper particles that circulate through a vehicle's cooling system and cure at leak sites to form a permanent seal, certified to the ASTM D-3147 standard and effective on leaks up to 0.6mm. The product line comprises four SKUs: K-Seal (236ml, for cooling systems up to 20 litres), K-Seal ULTIMATE (an enhanced formula targeting serious head gasket and porous block failures), K-Seal HD (472ml, for large commercial engine systems up to 57 litres) and K-Seal Flush (an all-in-one cooling system cleaner). The product is positioned as a cost-effective substitute for workshop repairs typically ranging from $70 (minor) to $1,500+ (head gasket) and $1,200+ (engine block).

K-Seal's revenue model is a one-time-purchase consumer packaged goods operation with no recurring component. Distribution is omnichannel: major US auto parts retailers (O'Reilly Auto Parts, Advance Auto Parts, Walmart, Pep Boys, NAPA, AutoZone, CarQuest) act as primary channels, supplemented by Amazon storefronts in multiple geographies and 20+ regional distributors across Europe, the Middle East, Asia-Pacific, Africa and South America. Pricing is not publicly disclosed; the company runs country-specific e-commerce sites alongside a website-based stockist locator that routes online traffic to local retail. The firm employs 11–50 staff from a single UK office and discloses no AI, software, or data products in its stack.

Name

K-Seal International

Legal name

K-Seal International Ltd.

Website

https://kseal.com

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

11–50 employees

Short description

K-Seal International Ltd. is a privately held UK manufacturer of automotive coolant leak repair products. It sells a proprietary ceramic microfibre and copper-particle formulation through major auto parts retailers and 20+ regional distributors across 25+ countries, serving DIY motorists, professional mechanics and commercial fleets.

Ownership category

akta.pro rank

Headquarters

HQ city

Lewes

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Marketing or Sales, Operations, Personnel, Infrastructure

Revenue model

1. Automotive Coolant Leak Repair Products: K-Seal generates revenue through the sale of its range of coolant leak repair products. The product line includes K-Seal (standard 236ml/8floz bottle for cooling systems up to 20 litres), K-Seal HD (Heavy Duty 472ml/16floz bottle for systems up to 57 litres), K-Seal ULTIMATE (for serious head gasket and porous block problems), and K-Seal Flush (all-in-one cooling system flush and cleaner). Revenue is generated through one-time product purchases by consumers and professional mechanics via retail and wholesale channels.

Go-to-market motion1 record

Distribution channels9 records

Marketing channels7 records

Core offering

K-Seal International manufactures and sells automotive coolant leak repair products under the K-Seal® brand. The product range includes K-Seal (standard formula for cooling systems up to 20 litres), K-Seal ULTIMATE (enhanced formula for serious head gasket failures), K-Seal HD (heavy-duty formula for commercial vehicles up to 57 litres), and K-Seal Flush (cooling system cleaner). The company also offers QuikSteel epoxy for tough repairs. Products use a proprietary blend of ceramic microfibres and copper particles to permanently seal leaks via a one-step pour-and-go application.

Product overview

K-Seal International offers a range of coolant leak repair products for water-cooled engines. The core portfolio consists of K-Seal® (standard formula for cars, vans, light trucks, and motorbikes with cooling systems up to 20 litres), K-Seal® ULTIMATE (enhanced formula for serious head gasket and porous block problems), and K-Seal® HD (heavy-duty version for large commercial vehicles with cooling systems up to 57 litres). All products use a proprietary blend of ceramic microfibres and copper particles that circulate through the cooling system and permanently seal holes, cracks, and leaks. The range is complemented by K-Seal Flush, an all-in-one cooling system flush and cleaner. The products are scientifically tested and compatible with all antifreeze/coolant types and water-cooled engines regardless of size or fuel type.

Differentiator

Problem solved

Functional benefit

Brands

• K-Seal®: Standard coolant leak repair product for cars, vans, light trucks and motorbikes with cooling systems up to 20 litres
• K-Seal® ULTIMATE
• K-Seal® HD
• K-Seal Flush

Products and services

• K-Seal® Original multi-purpose coolant leak repair product using ceramic microfibres and copper particles to permanently seal leaks in the head, head gasket, block, radiator, heater matrix, water pump casing, inlet manifold, and freeze plug. Designed for cars, vans, light trucks, and motorbikes with cooling systems up to 20 litres/21 quarts. Applied via one-step shake-and-pour method.
• K-Seal® ULTIMATE Enhanced formula specially developed to repair serious head gasket failures and porous block problems. Provides stronger sealing action for more severe coolant leak issues that exceed standard K-Seal capability.
• K-Seal® HD Heavy-duty version designed for large engines including HGVs (Heavy Goods Vehicles), tractors, heavy plant equipment, and other commercial vehicles. Treats cooling systems up to 57 litres/60 quarts, compared to the standard K-Seal which handles systems up to 20 litres/21 quarts.
• K-Seal Flush All-in-one cooling system flush and cleaner product for maintaining and cleaning automotive cooling systems, designed to complement the K-Seal repair range.
• QuikSteel Epoxy Epoxy-based repair product for tough repairs, offered by K-Seal International alongside the K-Seal coolant leak repair range.

Quantifiable outcome

• Over 13 million bottles sold worldwide
• +4 more outcomes

Named customers7 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

23 partnerships are on record, tiered core and minor.

• RepcocoreChannel Partner/ Reseller/ DistributorAustralian national auto parts retailer distributing K-Seal products through its retail stores across Australia.
• Supercheap AutocoreChannel Partner/ Reseller/ DistributorAustralian auto parts retail chain distributing K-Seal through its Australian store network.
• FMSI Automotive HardwarecoreChannel Partner/ Reseller/ DistributorCanadian automotive hardware distributor serving as the primary K-Seal distributor in Canada, located at 1070 Heritage Road Burlington ON L7L 4X9, phone 1-800-651-7445.
• Helix Automotive GmbHcoreChannel Partner/ Reseller/ DistributorGerman automotive distributor for K-Seal products, located at Fischeräcker 4, 74223 Flein, Germany.
• C & G GmbH Trade SolutionsminorChannel Partner/ Reseller/ DistributorGerman trade solutions company listed as an additional K-Seal distributor in Germany, located at Werner-von-Siemens-Str. 2-6, TRIWO Technopark, 76646 Bruchsal.
• Sud DiffusioncoreChannel Partner/ Reseller/ DistributorFrench automotive distributor for K-Seal, located at Rue De L'Auto Zac Palegril, 31330 Grenade, France.
• GML Global Treatment, S.L.coreChannel Partner/ Reseller/ DistributorSpanish distributor for K-Seal products, located at C/ Austria, 8 Pol. Ind. Los Chopos, 29004 Málaga, Spain.
• Grupo Mecánico-LíquidominorChannel Partner/ Reseller/ DistributorAdditional Spanish distributor for K-Seal, located in Spain.
• Katsaris Intertrade S.A.coreChannel Partner/ Reseller/ DistributorGreek automotive parts distributor for K-Seal, located at 29 Alkiviadou str, 10439 Athens, Greece.
• JLM Lubricants B.V.coreChannel Partner/ Reseller/ DistributorDutch lubricant and automotive distributor for K-Seal, located at Schiphol Boulevard 127, 1118 BG Schiphol, Netherlands.
• ROVERLAND.PL sp. z o.o.coreChannel Partner/ Reseller/ DistributorPolish distributor for K-Seal products in the European market, located at Majora Hubala 28, 95-054 Wola Zaradzyńska, Poland.
• HikaricoreChannel Partner/ Reseller/ DistributorSouth African automotive distributor for K-Seal, located at 6 Lathe Street, Amalgam, Johannesburg, 2092.
• Omnium FZ-LLCcoreChannel Partner/ Reseller/ DistributorMiddle East distributor for K-Seal serving UAE and Saudi Arabia markets, located at Compass Building, Al Shohada Road, AL Hamra Industrial Zone-FZ, Ras Al Khaimah, UAE.
• Adenwalla & SonscoreChannel Partner/ Reseller/ DistributorPakistani automotive parts distributor for K-Seal, located at 15-16 Musa market, Shahrah-e-Liaquat, Karachi, Pakistan.
• Sunhuat Automotive Intermarket Parts CorpcoreChannel Partner/ Reseller/ DistributorPhilippines automotive distributor for K-Seal, located at 8165-I Dr A Santos Ave, Paranaque 1700, Philippines.
• Tabernacle Engineering (S) Pte LtdcoreChannel Partner/ Reseller/ DistributorSingapore distributor for K-Seal, located at 1 Sunview Road #05-31 Eco-Tech @ Sunview, Singapore 627615.
• KarincacoreChannel Partner/ Reseller/ DistributorTurkish automotive parts distributor for K-Seal, located at Cumhuriyet, Kavak Sk. No:5, 41420 Çayırova/Kocaeli, Turkey.
• MCS CompanycoreChannel Partner/ Reseller/ DistributorArgentine distributor for K-Seal, located at Gral Acha 82, Avellaneda CP 1872, Buenos Aires, Argentina.
• InterpartscoreChannel Partner/ Reseller/ DistributorBolivian automotive parts distributor for K-Seal, located at Av. Heroinas 0-447, Cochabamba, Bolivia.
• ImpascoreChannel Partner/ Reseller/ DistributorBulgarian automotive parts distributor for K-Seal, located at 65V Cherni Vrah Blvd, 1407 Sofia, Bulgaria.
• Baltrader Ltd. Marine SupplyminorChannel Partner/ Reseller/ DistributorEstonian marine supply company distributing K-Seal, located at Punane 38A/1, 13619 Tallinn, Estonia.
• AltiCar DanmarkcoreChannel Partner/ Reseller/ DistributorDanish automotive distributor for K-Seal, located at Ørsted Bygade 4, Ørsted 4622 Havdrup, Denmark.
• Fulong Automotive TechnologycoreChannel Partner/ Reseller/ DistributorTaiwanese automotive technology distributor for K-Seal, located at No.30, Aly. 3, Ln. 223, Yangming Rd., Shanhua Dist., Tainan City 741, Taiwan (R.O.C.).

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• STP: STP is a broad automotive chemicals and performance brand owned by Energizer. It sells fuel additives, oil treatments, and cooling-system products through the same mass-market retailers as K-Seal, functioning as an incumbent competitor for shelf space and DIY wallet share.
• Liqui Moly: Liqui Moly is a major German motor-oil and additive manufacturer with a broad product portfolio across sealants, leak-stop, and cooling-system additives. It competes with K-Seal in Europe and emerging markets through the same type of parts-distributor channels.
• Prestone: Prestone is a large US incumbent in antifreeze/coolant and cooling-system additives. While not a stop-leak specialist, it occupies adjacent shelf space at the same retailers and competes for the consumer's cooling-system maintenance dollar.

Direct peers

• GUNK / Radiator Specialty: GUNK is the flagship consumer brand of the same parent company (RSC) behind Bar's Leaks, spanning engine degreasers, leak sealants, and stop-leak additives. It competes with K-Seal for the same DIY consumer shelf space at US auto retailers.
• Holts: Holts is a heritage UK aftermarket automotive chemicals brand (radiator flushes, sealants, screenwash). It is the closest UK-centric peer given K-Seal's UK roots and serves overlapping DIY consumer and mechanic segments with a comparable sealant/flush portfolio.
• Wynn's: Wynn's is a Belgium-based automotive chemical additives brand specializing in cooling-system, fuel-system, and oil-system treatments (including radiator sealants). It is a recognized global peer in the stop-leak and cooling-system maintenance category, distributed through parts retailers worldwide.
• Permatex: Permatex is a long-established US automotive adhesives, sealants, and gasket-maker brand. Although more workshop-focused than K-Seal, both compete in the chemically-sealed-cooling-system-repair category and overlap in professional mechanic adoption.
• BlueDevil Products: BlueDevil produces liquid sealant formulations for head gaskets, radiators, and oil leaks, sold through the same major US auto parts chains. Its chemical-seal approach targets the same DIY consumer and pro-mechanic buyer as K-Seal.
• JLM Lubricants: JLM Lubricants is a Dutch automotive fuel, oil and cooling-system additive specialist. Although it currently serves as one of K-Seal's regional distributors, JLM's own additive product range (radiator sealants, cooling treatments) places it as a comparable peer in the European aftermarket additive category.
• Bar's Leaks: Bar's Leaks (Radiator Specialty Company) is the longest-standing US brand in coolant, oil, and transmission stop-leak products. It competes head-to-head with K-Seal on US retail shelves at Walmart, AutoZone, and O'Reilly, addressing identical head-gasket, radiator, and block leak repair use cases.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/KSealCoolant
• YouTubeyoutube.com/user/MrKSeal
• Facebookfacebook.com/MrKSeal
• LinkedInlinkedin.com/company/k-seal-international-limited

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about K-Seal International