Tested: XCP Rust Blocker corrosion protectant review

Tested: XCP Rust Blocker corrosion protectant review


Date tested: April 2018 | Price: £16.49 for 400ml spray can, £16.99 for 500ml bottle | xcp-protection.com


XCP is a relative newcomer to the motorcycle corrosion protectant market, but it’s produced in the UK by Marott Graphic Services, a company with more than 30 years of experience in the printing industry, making protectants and lubricants for press rollers that spin at up to 15,000rpm, with a force of up to 40,000 Newtons. XCP Rust Blocker penetrates before it dries, which is demanded by the aviation industry, and is approved for use by Westland Helicopters and Honda Racing’s BSB team.

XCP is available in a bottle for use with a paint gun and compressor – it comes out slightly thicker than its direct competitor – ACF-50 – but is still easy to use with consumer-level kit like the Machine Mart compressor and gun used for this test. Applying with this method allows you to easily mist right up under the tank and into the deepest crevices around the engine (it’s safe on electrics), but make sure you mask off your wheels and brakes.

The bottle comes with a trigger pump that can be used to apply the product, but even when set to a fine mist, we found a lot comes out. We’d recommend using the bottle with a compressor (it’ll last ages), but otherwise buy the aerosol can, which gives a much finer spray.

Using the aerosol, it’s easy very easy to spray on, with no need to warm the can up. A long-reach wand is also available, which is extremely useful for spraying the product deep into open frame tubes and steel swing-arms.


XCP Rust Blocker performance

Applied with a paint gun and compressor, XCP performed very well, only exceeding 20% of corrosion on the steel plate after 13 weeks, and 50% after 16. It failed from the top edge of the hanging plate first, but it isn’t as liquid as some of its competitors, yet doesn’t go hard or crack.

When using the aerosol can, XCP gave the best performance of any of the products in the test – even when the hosing was carried out every day, it took 25 weeks before the steel plate was more than 20% covered with rust, and acceleration occurred at 24 weeks, after the plate was sprayed with a 15% solution of Surfex HD cleaner. By 27 weeks corrosion had covered 50%, and the test was stopped shortly after as all the others – except TechCote ACS TC200 and Scottoiler FS365 (when applied correctly) – had completely failed.


Tested: XCP Rust Blocker corrosion protectant review


Fresh steel plates were cut to size, folded at 90° (to give vertical and horizontal surfaces), then thoroughly cleaned before being coated with each product, as per the manufacturer’s guidelines. The test was carried out indoors, with a reasonably regulated temperature. For more information on how the test was done, please watch the video below.

Morning and night, the plates were each sprayed with a 5% solution of road salt in water, then consistently rinsed off at the end of each week with a hose head set to a shower pattern.

After eight weeks, the hose head was switched to a more aggressive fan spray, and the plates were rinsed with a consistent five full strokes from a distance of one inch each time.

After 14 weeks, any products that hadn’t completely corroded were hosed off every evening.


XCP Rust Blocker stickiness test

When applied with a paint gun, XCP gave a more matt-looking finish than ACF-50, and had no visible colour on the plate. After drying for 24 hours, sand dusted over it stuck to the entire plate, as it did on the other protectants in the test. After rinsing with water, most of the sand was removed, leaving about the same amount as retained by SDoc100 and ACS TC200, but more than ACF-50.

A similar amount of sand was retained by the plate coated with the aerosol can, before and after rinsing. In both cases though, all the sand was removed with the fan spray.

The spray can-applied plate looked shinier than the painted product, but left no visible colour. It didn’t pool like ACF-50’s aerosol in this test, as it’s not as liquid, but we know from experience than if over-applied, it can leave a brown tint. However, like ACF-50, this can be easily wiped with a cloth to leave a thinner, but still protective coating. When spraying on your bike, any excess will most likely be seen pooled in crevices or on bodywork and larger frame surfaces – just reduce this with a clean rag.


XCP was tested for stickiness after being applied with a compressor and from the aerosol can


Metal plates were cut to size then thoroughly cleaned, before each product was applied as per the manufacturer’s instructions.

The plates were left indoors, laid horizontally for 24 hours, then each was dusted with fine sand. The plates were tapped vertically to knock any excess sand off, before being assessed for stickiness.

Next, each plate was rinsed with a hose head set to a shower pattern, and the amount of sand left was assessed.

Finally, each plate was hosed with five full strokes from a distance of one inch using a more aggressive fan pattern, before being checked for any remaining sand. Both rinsing cycles represent the methods used during corrosion testing.


XCP Rust Blocker safety on rubber

XCP proved completely safe in our O-rings test, and like its competitor, XCP gives a great finish when wiped over unpainted black plastic.

Brand new O-rings kindly supplied by motorcycle parts specialist B&C Express were put into test tubes containing each product. These were left for three months to soak, before the O-rings were carefully removed and assessed for any swelling, cracking, or other changes to their structure.

Please note that we do not recommend using these products as chain lubes – we’re just using the O-rings as a consistent material.


XCP Rust Blocker review verdict

While there are a handful of very effective corrosion protectants on the market now (please see our other reviews below), many users will be specifically focussing on XCP Rust Blocker’s performance against ACF-50. It did prove stickier than ACF, but any sand in our test was completely removed by hosing off. As XCP is so resilient, and its performance so high, washing doesn’t degrade the protection to any significant degree, so the product can be used for the longest time without reapplication.

XCP gave very impressive corrosion protection – the best in test – and can be considered a product that will protect your bike through a full winter and beyond. If you ride through the salt and rain, application around the end of summer should see your motorcycle fare extremely well, right into spring. If you use a cleaning agent, as with any product, it’s worth giving another coat of protection. Highly recommended.


Group graph


The full list of products tested is as follows:

  • ACF-50
  • XCP Rust Blocker
  • Scottoiler FS 365
  • SDoc100 Corrosion Protectant
  • TechCote ACS TC200
  • Muc-Off Motorcycle Protectant
  • Original WD-40
  • GT85
  • Valvoline Multi Spray
  • Motorex Moto Protect

To read the reviews of any of these items, please click here.


Full timelapse of the test

John explains how the biggest ever corrosion test was done, and shows the entire process, from bare metal to fully corroded…

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