J-B Weld HighHeat™ Epoxy Syringe 25ml – Heat Resistant Metal Repair Adhesive

J-B Weld HighHeat™ Epoxy Syringe 25ml is a high-strength, heat-resistant epoxy adhesive designed for bonding and gap filling on metal components and other suitable substrates exposed to temperatures up to 260°C (500°F). With a powerful 4,730 PSI bonding strength, it provides a durable repair solution for demanding automotive, workshop and high-temperature applications.

Ideal for vehicle exhaust repairs, rust-damaged metal and other high-heat automotive components, J-B Weld HighHeat™ combines strong adhesion with resistance to heat, water and chemicals.

The epoxy is suitable for use on a range of metals, including aluminium, brass, copper, iron and stainless steel, making it a versatile choice for repairing and bonding metal components exposed to elevated temperatures.

HighHeat™ can be used for both bonding and gap-filling applications, helping repair cracks, damaged areas and suitable joints where a strong, heat-resistant epoxy is required.

The epoxy has an approximate 1-hour set time and can be fully cured in approximately 24 hours at room temperature. A heat-assisted curing process can reduce the cure time to approximately 1 hour when carried out according to the manufacturer's instructions.

Once cured, J-B Weld HighHeat™ forms a strong dark grey repair capable of withstanding temperatures up to 260°C (500°F).

For anyone searching for a high-temperature metal epoxy, exhaust repair adhesive, heat-resistant gap filler or automotive metal repair epoxy, J-B Weld HighHeat™ provides a specialist solution combining high bond strength with excellent temperature resistance.

Key Benefits

• High-temperature epoxy adhesive

• Suitable for bonding and gap filling

• Withstands temperatures up to 260°C / 500°F

• High 4,730 PSI bonding strength

• Ideal for high-heat metal repairs

• Suitable for vehicle exhaust repairs

• Useful for repairing suitable rust-damaged areas

• Designed for high-temperature automotive components

• Suitable for aluminium

• Bonds brass

• Suitable for copper

• Bonds iron

• Suitable for stainless steel

• Resistant to water

• Chemical resistant

• Heat resistant

• Sets in approximately 1 hour

• Full cure in approximately 24 hours at room temperature

• Can be heat cured in approximately 1 hour when applied according to manufacturer instructions

• Cures to a dark grey finish

• Convenient 25ml syringe

How to Use

• Ensure the component is completely cool before beginning the repair.

• Clean the repair area thoroughly, removing grease, oil, dirt, rust, paint and loose material that could affect adhesion.

• Prepare or roughen smooth metal surfaces where appropriate to provide a suitable key for the epoxy.

• Dispense the required epoxy components from the syringe and prepare them according to the manufacturer's instructions.

• Mix thoroughly before applying to the repair area.

• For bonding, apply the epoxy to the required surface and bring the components together.

• For gap filling, work the mixed epoxy firmly into the crack, gap or damaged area.

• Position and secure the components where necessary while the initial bond develops.

• Allow approximately 1 hour for the epoxy to set.

• For a standard room-temperature cure, allow approximately 24 hours for full cure.

• Where appropriate, the specified heat-assisted curing process can provide a full cure in approximately 1 hour. Follow the manufacturer's instructions carefully when using heat to cure the product.

• Do not expose the repaired component to operating temperatures until the epoxy has fully cured.

• Always follow the manufacturer's application and safety instructions supplied with the product.

Suitable Materials & Applications

• Aluminium

• Brass

• Copper

• Iron

• Stainless steel

• Vehicle exhaust components

• High-heat automotive parts

• Suitable rust-damaged metal

• Metal cracks and gaps

• High-temperature joints

• Workshop repairs

• Automotive maintenance

• High-temperature metal bonding

• Heat-resistant gap filling

Product Information

Brand: J-B Weld
Product: HighHeat™ Epoxy Syringe
Size: 25ml
Type: High-temperature epoxy adhesive & gap filler
Bonding Strength: 4,730 PSI
Maximum Temperature: 260°C / 500°F
Set Time: Approximately 1 hour
Cure Time at Room Temperature: Approximately 24 hours
Heat-Assisted Cure: Approximately 1 hour when carried out according to manufacturer instructions
Colour When Dry: Dark Grey
Water Resistant: Yes
Chemical Resistant: Yes
Heat Resistant: Yes
Suitable Metals: Aluminium, brass, copper, iron & stainless steel
Primary Use: High-temperature bonding, gap filling & metal repair

WEEE Recycling Producer Registration Number:12889

How do I return my old product to be recycled?

You can return your old product to MyDIY. Waste Electrical and Electronic Equipment (WEEE) is taken back free of charge on a one-for-one, like-for-like basis. Waste batteries including rechargeable batteries are taken back free of charge. You are not obliged to make any purchase when returning old batteries. Each local authority must also accept household WEEE and small batteries free of charge at its recycling facilities. All WEEE and waste batteries must be recycled and should not be placed in any of your household wheelie bins. Make sure you always recycle all your old electrical goods and batteries.

What products can I recycle for free?

You can return anything that is electricaly powered or battery powered. Even your old bicycle lamps can be recycled!.

Do you take back used batteries?

Yes we do. The batteries that we accept are AA, AAA, C or D, powertool batterys and also the flat batteries that are found in watches and toys. Unfortunately we do not accept back any Industrial or car batteries.

Do I need to have made a purchase at MyDIY.ie?

No you don't. You can recycle any of the above items at our store in Inchicore Dublin 8, even if you have not made a purchase with us.

Will you collect my old product?

Yes, but we must be notafied within 14 days of purchase date. You can still arrange to have your old appliance recycled free of charge. Simply bring it back to our Inchicore store and we will ensure that it is disposed of in an environmentally friendly manner.

How much will it cost?

There is no charge to return products to any of our warehouses.

Why should I recycle with MyDIY?

We will ensure that your old product is disposed of correctly to reduce the potentially harmful effects caused on the environment and to conserve natural resources. Further information can be found on weeeireland.ie.

EMC (Environmental Management Cost) Included in the purchase price. 

Gas discharge lamps, LFLs and CFLs €0.15

LED lamps and luminaires €0.05

Large appliances €5.00

Information

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We ship all orders via DPD, one of Ireland’s most trusted couriers. With DPD’s one-hour delivery window, you won’t have to wait around all day for your MyDIY.ie order!

Delivery Times

Each product on our website is marked with an estimated delivery time. If you order multiple items, your order will arrive based on the item with the longest delivery time. For example, if you buy two next-day items and one 3-day item, the entire order will arrive in 3 days.

While most products arrive in 1-2 days, we offer over 44,000 items, so please allow 4-5 working days for some deliveries. Need it faster? Call us at 01-446692, and we'll do our best to help.

Delivery Charges

• FREE delivery for orders over €150 within Ireland.

• Orders under €150: €8.99 delivery fee.

• International delivery: Charges based on weight—contact us for a quote.

When Will I Receive My Order?

• Most orders ship on a 24-hour courier service (2 working days).

• Larger orders may take 4-5 days, and pallet deliveries require scheduling.

• Orders placed before 2 PM usually ship within 24 hours.

• Orders after 1:30 PM Friday or on weekends ship the following week.

• Busy holiday periods may cause slight delays beyond our control.

Do I Need to Be Home for Delivery?

Yes, someone must sign for deliveries due to item value. If you're not home, DPD will leave a card with re-delivery or collection instructions. After two failed attempts, your order may be returned to us, and a re-delivery fee may apply.

Damaged or Incomplete Orders

We carefully pack all orders, but if something arrives damaged or incomplete, contact us within 24 hours. Report shortages within 3 days of delivery.

International Shipping

We ship to Europe and worldwide, with charges based on weight. Liquid products cannot be shipped internationally due to regulations. Contact us for a quote—we're happy to help!

Customer Service & Returns

• Great product goes off like a bullet

  5/5

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  Date: 18/06/2026