# Buy HOLTS Wondarweld at Autoservice ## HOLTS Wondarweld sealing compound engine block 250ml Brands / HOLTS Professional sealing compound for the permanent repair of cracks and leaks in engine blocks, cylinder heads, and head gaskets. ## Prices and stock - **ACC HOL WW250EU**: € 11,19 incl. VAT — 4 in stock ## Order URL [HOLTS Wondarweld sealing compound engine block 250ml](https://www.auto-service.be/en/oil-additives/additives/for-oil/holts-wondarweld-engine-block-sealant-250ml) ## Alternate URLs - **nl**: [HOLTS Wondarweld sealing compound engine block 250ml](https://www.auto-service.be/nl/merken/holts/holts-wondarweld-dichtingsmiddel-motorblok-250ml) - **fr**: [HOLTS Wondarweld sealing compound engine block 250ml](https://www.auto-service.be/fr/marques/holts/holts-wondarweld-mastic-pour-bloc-moteur-250ml) - **en**: [HOLTS Wondarweld sealing compound engine block 250ml](https://www.auto-service.be/en/brands/holts/holts-wondarweld-engine-block-sealant-250ml) ## Images - ![Product image](https://www.auto-service.be/assets/media/25471/conversions/holts-wondarweld-dichtingsmiddel-motorblok-250m-optimized.jpg) ## Specifications - **Reference**: ACC HOL WW250EU - **EAN**: 5010218345058 - **Brand**: HOLTS ## Product description ### Professional repair of engine blocks Holts Wondarweld is a high-quality sealing compound specially developed for the permanent sealing of small cracks and leaks in engine blocks, cylinder heads, and head gaskets. Thanks to its powerful formula, it offers a durable solution without clogging the cooling system or causing damage. ### Suitable for various engine materials This product is compatible with different engine types and materials, including: - Steel engines - Aluminum engines - Iron engines A 250 ml bottle is sufficient for cooling systems up to 8 liters, making it suitable for a wide range of vehicles. ### Easy to use For effective application of Wondarweld, follow these steps: 1. Drain the cooling system and flush it with a suitable cleaner to remove residues and contaminants. 2. Remove the upper hose from the cylinder head outlet and remove the thermostat. 3. Use a funnel to pour Wondarweld directly into the cylinder head outlet. Make sure the product does not get into the oil to prevent severe engine damage. 4. Reinstall the thermostat and the upper hose. 5. Fill the system with clean water and run the engine for 15 minutes to seal the leak. 6. After the repair, drain the system again, flush it with clean water, and refill with high-quality coolant. ### Important points to note - Wondarweld is designed for use in cooling systems filled with water. It is not soluble in coolant and may cause gel formation when mixed, which can lead to blockages. - Never pour the product into the oil, as this can cause severe engine damage. ### Technical specifications - Content: 250 ml - Suitable for cooling systems up to 8 liters - Compatible with steel, aluminum, and iron engines With Holts Wondarweld, you choose a reliable and professional solution to effectively seal small cracks and leaks in your engine block. ## Breadcrumbs - [Brands](https://www.auto-service.be/en/brands) - [HOLTS](https://www.auto-service.be/en/brands/holts) ## Related products - [LEAKLOCK oil additive 150ml for stopping oil leaks](https://www.auto-service.be/en/oil-additives/additives/for-oil/leaklock-150ml) - [Bardahl additive for hydraulic tappets 300ml](https://www.auto-service.be/en/oil-additives/additives/for-oil/bardahl-hydraulic-tappet-additive-300ml) - [BARDAHL Turbo Protect oil additive 325ml for optimal turbo and engine protection](https://www.auto-service.be/en/oil-additives/additives/for-oil/bardahl-turbo-protec-325ml) - [WYNN'S Super Friction Proofing 325ml oil additive](https://www.auto-service.be/en/oil-additives/additives/for-oil/wynns-super-firction-profing-325ml) - [Wynn's Gold Performance Engine Treatment oil additive 500ml](https://www.auto-service.be/en/oil-additives/additives/for-oil/wynns-gold-performance-engine-treatment-oil-additive-500ml) ## Webshop catalogue - [Car Cleaning](https://www.auto-service.be/en/car-cleaning) - [Exterior](https://www.auto-service.be/en/car-cleaning/exterior) - [Car Shampoo](https://www.auto-service.be/en/car-cleaning/car-shampoo) - [Interior](https://www.auto-service.be/en/car-cleaning/interior) - [Leather upholstery](https://www.auto-service.be/en/car-cleaning/leather-upholstery) - [Rims & tires](https://www.auto-service.be/en/car-cleaning/rims-tires) - [Polishing](https://www.auto-service.be/en/car-cleaning/polishing) - [Windows](https://www.auto-service.be/en/car-cleaning/windows) - [Wax & protect](https://www.auto-service.be/en/car-cleaning/wax-protect) - [Scratch treatment](https://www.auto-service.be/en/car-cleaning/scratch-treatment) - [Accessories](https://www.auto-service.be/en/car-cleaning/accessories) - [Kits](https://www.auto-service.be/en/car-cleaning/kits) - [Luggage & Transport](https://www.auto-service.be/en/luggage-transport) - [Bike carriers](https://www.auto-service.be/en/luggage-transport/bike-carriers) - [Roof box](https://www.auto-service.be/en/luggage-transport/roof-box) - [Roof rack](https://www.auto-service.be/en/luggage-transport/roof-rack) - [Trailer accessories](https://www.auto-service.be/en/luggage-transport/trailer-accessories) - [Trailer lighting](https://www.auto-service.be/en/luggage-transport/trailer-lighting) - [Work & flashing lights](https://www.auto-service.be/en/luggage-transport/work-flashing-lights) - [Tire Material](https://www.auto-service.be/en/luggage-transport/tire-material) - [Towbar cargo boxes](https://www.auto-service.be/en/luggage-transport/towbar-cargo-boxes) - [Breakdown underway](https://www.auto-service.be/en/luggage-transport/breakdown-underway) - [Tools](https://www.auto-service.be/en/tools) - [Hand Tools](https://www.auto-service.be/en/tools/hand-tools) - [Impact Sockets](https://www.auto-service.be/en/tools/impact-sockets) - [Sockets and bits](https://www.auto-service.be/en/tools/sockets-and-bits) - [Electric](https://www.auto-service.be/en/tools/electric) - [Pneumatic](https://www.auto-service.be/en/tools/pneumatic) - [Special for automotive](https://www.auto-service.be/en/tools/special-for-automotive) - [Battery powered tools](https://www.auto-service.be/en/tools/battery-powered-tools) - [Cleaning machines](https://www.auto-service.be/en/tools/cleaning-machines) - [Garage equipment](https://www.auto-service.be/en/tools/garage-equipment) - [Tool walls](https://www.auto-service.be/en/tools/tool-walls) - [High-voltage tools](https://www.auto-service.be/en/tools/high-voltage-tools) - [Sandblasting](https://www.auto-service.be/en/tools/sandblasting) - [Ultrasonic cleaners](https://www.auto-service.be/en/tools/ultrasonic-cleaners) - [Degreaser Bins](https://www.auto-service.be/en/tools/degreaser-bins) - [Battery chargers and boosters](https://www.auto-service.be/en/tools/battery-chargers-and-boosters) - [Lift bridges](https://www.auto-service.be/en/tools/lift-bridges) - [Air conditioning](https://www.auto-service.be/en/tools/air-conditioning) - [Workshop press](https://www.auto-service.be/en/tools/workshop-press) - [Tool trolleys](https://www.auto-service.be/en/tools/tool-trolleys) - [Garage Management](https://www.auto-service.be/en/tools/garage-management) - [Workwear and protection](https://www.auto-service.be/en/tools/workwear-and-protection) - [Bodywork](https://www.auto-service.be/en/bodywork) - [Preparation](https://www.auto-service.be/en/bodywork/preparation) - [Sanding](https://www.auto-service.be/en/bodywork/sanding) - [Filling](https://www.auto-service.be/en/bodywork/filling) - [Anti-rust protection](https://www.auto-service.be/en/bodywork/anti-rust-protection) - [Paint](https://www.auto-service.be/en/bodywork/paint) - [Spray cans](https://www.auto-service.be/en/bodywork/spray-cans) - [Spray guns & accessories](https://www.auto-service.be/en/bodywork/spray-guns-accessories) - [Windshield replacement](https://www.auto-service.be/en/bodywork/windshield-replacement) - [Adhesives & silicones](https://www.auto-service.be/en/bodywork/adhesives-silicones) - [Welding equipment](https://www.auto-service.be/en/bodywork/welding-equipment) - [Grinding & Drilling](https://www.auto-service.be/en/bodywork/grinding-drilling) - [Mounting Clips](https://www.auto-service.be/en/bodywork/mounting-clips) - [Body repair tools](https://www.auto-service.be/en/bodywork/body-repair-tools) - [Spray Booth](https://www.auto-service.be/en/bodywork/spray-booth) - [Electrical](https://www.auto-service.be/en/electrical) - [Cable protection](https://www.auto-service.be/en/electrical/cable-protection) - [Battery charging clamps](https://www.auto-service.be/en/electrical/battery-charging-clamps) - [Battery terminal](https://www.auto-service.be/en/electrical/battery-terminal) - [Connectors](https://www.auto-service.be/en/electrical/connectors) - [Insulated cable lugs](https://www.auto-service.be/en/electrical/insulated-cable-lugs) - [Non-insulated terminal lugs](https://www.auto-service.be/en/electrical/non-insulated-terminal-lugs) - [Cables](https://www.auto-service.be/en/electrical/cables) - [Crimp Connectors](https://www.auto-service.be/en/electrical/crimp-connectors) - [Mass Strips](https://www.auto-service.be/en/electrical/mass-strips) - [Relay](https://www.auto-service.be/en/electrical/relay) - [Switches & control lights](https://www.auto-service.be/en/electrical/switches-control-lights) - [Fuses](https://www.auto-service.be/en/electrical/fuses) - [Tools](https://www.auto-service.be/en/electrical/tools) - [Parts](https://www.auto-service.be/en/parts) - [Hose clamps](https://www.auto-service.be/en/parts/hose-clamps) - [Hoses](https://www.auto-service.be/en/parts/hoses) - [Hose connections](https://www.auto-service.be/en/parts/hose-connections) - [Brakes](https://www.auto-service.be/en/parts/brakes) - [Dust covers](https://www.auto-service.be/en/parts/dust-covers) - [Gaskets](https://www.auto-service.be/en/parts/gaskets) - [Exhaust accessories](https://www.auto-service.be/en/parts/exhaust-accessories) - [Windshield Wipers](https://www.auto-service.be/en/parts/windshield-wipers) - [Batteries](https://www.auto-service.be/en/parts/batteries) - [Ignition System](https://www.auto-service.be/en/parts/ignition-system) - [Fasteners](https://www.auto-service.be/en/fasteners) - [Assortments](https://www.auto-service.be/en/fasteners/assortments) - [Blind rivets](https://www.auto-service.be/en/fasteners/blind-rivets) - [Blind rivet nuts](https://www.auto-service.be/en/fasteners/blind-rivet-nuts) - [Bolts](https://www.auto-service.be/en/fasteners/bolts) - [Nuts](https://www.auto-service.be/en/fasteners/nuts) - [Rings](https://www.auto-service.be/en/fasteners/rings) - [Screws](https://www.auto-service.be/en/fasteners/screws) - [Threaded rods](https://www.auto-service.be/en/fasteners/threaded-rods) - [Plate nuts and plate bolts](https://www.auto-service.be/en/fasteners/plate-nuts-and-plate-bolts) - [Split pins](https://www.auto-service.be/en/fasteners/split-pins) - [Cable Ties](https://www.auto-service.be/en/fasteners/cable-ties) - [Vibration dampers](https://www.auto-service.be/en/fasteners/vibration-dampers) - [Oil & Additives](https://www.auto-service.be/en/oil-additives) - [Additives](https://www.auto-service.be/en/oil-additives/additives) - [Oil](https://www.auto-service.be/en/oil-additives/oil) - [Liquids](https://www.auto-service.be/en/oil-additives/liquids) - [Accessories](https://www.auto-service.be/en/oil-additives/accessories) - [Adhesives](https://www.auto-service.be/en/oil-additives/adhesives) - [Hygiene](https://www.auto-service.be/en/oil-additives/hygiene) - [Grease](https://www.auto-service.be/en/oil-additives/grease) - [Technical Products](https://www.auto-service.be/en/oil-additives/technical-products) - [Crankcases plugs & sealing rings](https://www.auto-service.be/en/oil-additives/crankcases-plugs-sealing-rings) - [Mobile Fuel tanks](https://www.auto-service.be/en/oil-additives/mobile-fuel-tanks) - [Accessories](https://www.auto-service.be/en/accessories) - [Audio](https://www.auto-service.be/en/accessories/audio) - [Exterior](https://www.auto-service.be/en/accessories/exterior) - [Interior](https://www.auto-service.be/en/accessories/interior) - [Car Seat Covers](https://www.auto-service.be/en/accessories/car-seat-covers) - [Car Lights](https://www.auto-service.be/en/accessories/car-lights) - [Car chargers & smartphone holders](https://www.auto-service.be/en/accessories/car-chargers-smartphone-holders) - [Air Fresheners](https://www.auto-service.be/en/accessories/air-fresheners) - [L-apprentice](https://www.auto-service.be/en/accessories/l-apprentice) - [Dashcams & radar detectors](https://www.auto-service.be/en/accessories/dashcams-radar-detectors) - [Batteries](https://www.auto-service.be/en/accessories/batteries) - [Winter Products](https://www.auto-service.be/en/accessories/winter-products) - [Car mats & trunk shells](https://www.auto-service.be/en/accessories/car-mats-trunk-shells) - [Merchandise](https://www.auto-service.be/en/accessories/merchandise)