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Performance Engine Oils
HeatShield Insul-Boot - Spark Plug Boot Heat Socks 1" x 6" - Red

HeatShield Insul-Boot - Spark Plug Boot Heat Socks 1" x 6" - Red


HeatShield Insul-Boot Red - Pack of 2

Pack of 2


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  • Description
  • Benefits
  • Technical Info
  • Shipping Explained

HeatShield Insul-Boot - Spark Plug Boot Heat Socks 1" x 6" - Red

HeatShield spark plug boot heat socks combine double-wall construction and special heat coatings to protect plug wires from ambient heat exposure and damage up to 649°C. They can even help in instances where the spark plug boot directly touches the header or manifold. 

Special heat treatment of the fibreglass reflects and dissipates heat, offering superior levels of ambient heat protection for your expensive plug wire sets. These heat shields also prevent misfires caused by plug-wire burnout, helping prevent critical engine damage and performance losses. The result is extended plug wire and boot life and increased ignition-system performance through reduced wire resistance.

The universal design fits most spark plug boot angles, is very easy to install and will not hinder spark plug changes. Simply place the ring side on end of spark plug boot and slide the wide end towards the wire, the ring side should rest between cylinder head and top of plug boot.

Always wear safety glasses, a dust mask and gloves when handling this product.

When choosing a heat shield, there’s nothing like the quality of HeatShield Products. Insul-Boot™ is the original spark plug heat sock introduced over 20 years ago. Rugged double wall high construction fits almost every boot out there. It has inspired many knock offs but the original is still the best spark plug wire heat shield there is.

Made in the USA from premium materials, HeatShield stand by their temperature ratings and offer you genuine products that are #racetested.


  • Rated for 649°C continuous use, 1093°C intermittent
  • Reflects and dissipates heat continuously, protecting your plugs from damage
  • 1” (2.54cm) internal diameter fits most spark plug boots, even those with 90° angle
  • Double-wall construction
  • Made in the USA

Technical Information:

  • Internal Diameter: 1"
  • Length: 6"
  • Colour: Red
  • Rated for continuous use: 649°C
  • Rated for Intermittent use: 1093°C


SHIPPING IS FREE* for orders of £75 and over , regardless of the weight of your order.
We've tried to keep all other shipping costs as low as we can.

Carriage starts at just £0.95 (inc VAT) for small items, with our most common courier rate set at £5.99 for orders of 5kg (enough for 5 litres of oil).

  • *Free shipping is available for UK Royal Mail, UPS Access Point™ (click & collect) and standard UK courier services (not express / priority / islands).
  • Courier surcharges mean we are unable to offer free "to the door" courier shipping from us in Cornwall up to Highlands / Grampian in Scotland - and because we send a lot of liquids, not every courier option is available to us. UPS Access Point™ (click & collect) is available as a free shipping option across Scotland, Wales and England, wherever there is a UPS Access Point™ Location.
  • Carriage charges are based on weight - please see our table of carriage costs for full details (although adding an item to your cart and viewing the calculated carriage is often easier!).
  • Priority shipping is also available.

How long will it take to get my order?

We give an estimate of delivery dates as you shop and in your basket. The vast majority of items are held in stock and dispatched from our UK warehouse and we'll do all we can to get your order to you as quickly as possible.

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