Bulwell, Nottingham Mon–Fri 9–5:30, Sat 9–1 Next-day delivery order by 1pm

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Next-day UK delivery on car parts, tools & accessories — order by 1pm Mon–Fri, £3. Next-day UK delivery — order by 1pm. Order by 1pm tomorrow and it’s with you on Thursday. Or Click & Collect free from Bulwell.

Holts Wondarweld 500ml Engine Block Cylinder Head Leak Sealer

£22.99 inc. VAT

1 in stock

Next-day delivery Order by 1pm tomorrow and it’s with you on Thursday.

  • Permanently seals cracks and leaks in engine blocks
  • Effective for cylinder head gasket leaks
  • Restores integrity of the cooling system
  • Helps prevent coolant loss and engine overheating
Next-day UK delivery £3 (order by 1pm Mon–Fri), or free click & collect from our Bulwell shop — 2–4 Carey Road, NG6 8AT. Choose collection at checkout, then pick it up any time in opening hours (Mon–Fri 9–5:30, Sat 9–1) — just quote your order number.
SKU: HOL-WW500 Category: Brand:

Description

Genuine HOLTS · Part no. WW500

Holts Wondarweld is an advanced liquid repair solution specifically formulated to permanently seal cracks and leaks within engine blocks and cylinder heads. This powerful additive circulates through the cooling system, identifying and sealing minor imperfections that lead to coolant loss, overheating, and potential engine damage. It provides a reliable and cost-effective method to address internal engine leaks without requiring complex mechanical dismantling.

Key features

  • Permanently seals cracks and leaks in engine blocks
  • Effective for cylinder head gasket leaks
  • Restores integrity of the cooling system
  • Helps prevent coolant loss and engine overheating
  • Easy-to-use pour-in liquid formula
  • Cost-effective alternative to extensive mechanical repairs
  • 500ml capacity for comprehensive treatment

Specification

Brand HOLTS
Part number WW500
Condition Brand New

Fitment & use

Suitable for use in most automotive cooling systems.

Ideal for

Repairing minor internal leaks in engine blocks or cylinder heads; preventing coolant loss and subsequent overheating.

Also known as

Engine block sealant, Cylinder head repair fluid, Cooling system leak repair, Head gasket repair solution

Genuine HOLTS product.
Brand new and supplied ready to fit.

Additional information

Weight 0.77 kg
Volume

500ml

£22.99 inc. VATinc. VAT