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PCB GUARD  · PURPOSE-BUILT PCB PROTECTION

PCB Guard. Protect expensive PCBs from water damage.

PCB Guard by HeatLab
PCB Guard by HeatLab
PCB Guard by HeatLab
PCB Guard by HeatLab
PCB Guard by HeatLab

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See it in action

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PCB Guard by HeatLab
PCB Guard by HeatLab
PCB Guard by HeatLab
PCB Guard by HeatLab
PCB Guard by HeatLab

See the RadKey up close

Tap an image

See it in action

Watch the 40-second demonstration
4.5/5 230 Amazon ratings

100+ bought last month

PROTECTED UK DESIGN · ONLY FROM HEATLAB

The professional
alternative to bags.

A reusable waterproof 600D barrier that straps around the PCB and closes around the cables while you work

★★★★★ 4.6/5 101 customer reviews
Help protect PCBs worth hundreds
Fits most boilers and appliance panels
Five cable flaps close around wiring
Fast-buckle straps hold it in place
£24.99 £14.99
SAVE £10
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✓ Free UK delivery · Secure checkout · VAT included

100,000+ HeatLab tools sold
UK designed by heating engineers
1
Position Over the exposed PCB
2
Secure Route cables and fasten
3
Protect Add a barrier while you work

ONE AVOIDED MISTAKE CAN COVER THE COST

A £14.99 tool
protecting a PCB
worth hundreds.

Pumps, valves and hydraulic components can sit above an exposed circuit board. One unexpected drip can turn a routine repair into an expensive return visit.

PCB Guard adds a purpose-built barrier between the water and the board. If it prevents one PCB replacement, it can repay its cost many times over.

See why it beats a bag
PCB Guard £14.99
VS
ReplacementPCB Can costhundreds

Plus the time, call-back and awkward customer conversation.

PURPOSE-BUILT, NOT IMPROVISED

Stop reaching for a loose
bag. Stop reaching for a
loose bag.

A professional job deserves a professional barrier.

THE PROFESSIONAL OPTION

HeatLab PCB Guard

  • Purpose-designed fit for appliance PCB panels
  • Five closable flaps route cables with fewer open gaps
  • Adjustable buckle straps hold the barrier securely
  • Reusable waterproof 600D tool-bag-grade material
  • Professional appearance in front of the customer
×
THE MAKESHIFT OPTION

Carrier or bin bag

  • × Loose, improvised fit around the PCB
  • × Open gaps where cables enter and leave
  • × Can slip, tear or need tape to stay put
  • × Disposable and easy to forget
  • × Looks improvised on a professional job
Get the professional solution

BUILT FOR WORK ON REAL APPLIANCES

Every detail helps you fit
it quickly and work
cleanly.

PCB Guard open with straps and cable flaps visible
01

Waterproof 600D construction

Robust material like that used on quality tool bags—made to be reused job after job.

02

Five cable flaps

Open only the flaps you need, route the wiring, then close them around the cables.

03

Adjustable buckle straps

Fasten the guard around the appliance so it stays where you position it.

04

Approx. 450mm square

A universal format designed to fit most domestic boilers and many appliance PCB panels.

FITS IN MINUTES

Position. Route. Secure.

1

Work safely

Isolate and follow the correct procedure for the appliance before fitting the guard.

2

Cover the PCB

Position the sheet over the board and route the required wiring through the cable flaps.

3

Fasten and check

Close the flaps, secure the buckle straps and check the protective barrier before starting work.

Professional protection, used properly. The 600D sheet is waterproof, but protection depends on correct fitting. PCB Guard is an additional barrier—not a substitute for isolation, competent working practice or protection from mains-pressure spray.
4.6 out of 5 From 101 customer reviews
100,000+ HeatLab tools sold
Designed in the UK By heating engineers

WHY ENGINEERS KEEP IT IN THE VAN

Peace of mind when one drip could become an expensive problem.

PCB Guard turns an improvised precaution into a repeatable, professional part of the job.

GOOD TO KNOW

PCB Guard questions, answered.

Will it fit every boiler?

PCB Guard has a universal design intended to fit most domestic boiler PCB panels. Boiler layouts vary, so a perfect fit on every model cannot be guaranteed.

Is PCB Guard waterproof?

The 600D sheet itself is waterproof. Effective protection depends on fitting it correctly and closing the cable flaps around the wiring. Hook-and-loop seams are not intended to withstand direct mains-pressure spray.

Can I use it on appliances other than boilers?

Yes. Its approximately 450mm-square universal format can suit many HVAC, heat-pump and electrical appliance PCB panels, provided it can be positioned and secured correctly.

Why not just use a plastic bag?

PCB Guard is reusable and purpose-built, with five closable cable flaps and adjustable buckle straps. It provides a more controlled fit and a more professional solution than an improvised loose bag.

Is it reusable?

Yes. After use, wipe it clean, allow it to dry fully and inspect the material, flaps and straps before the next job.

Is this a HeatLab design?

Yes. PCB Guard is a protected HeatLab design, available from HeatLab. UK patent application: GB2302044.9.

PROTECT THE BOARD BEFORE THE FIRST DRIP

Make PCB Guard part of everywet-side repair.

Professional protection for £14.99, with free UK delivery.

£24.99 £14.99
Get PCB Guard Secure UK checkout · VAT included
Heatlab

Tools designed by engineers, for engineers.

© 2026 HeatLab Ltd

PCB Guard 4.6 · £14.99
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