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Fernox MB-1 Protector 4Ltr

Product Code: 97287

4Ltr. Gives long-term protection of domestic central heating systems against internal corrosion and limescale formation. Prevents corrosion of all metals and is suitable for use on all types of boilers, radiators and pipework systems. Non-toxic.

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Safety Data Sheet (COSHH)




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Rated 5 out of 5 by FERNOX MB-1 This is the only protector that I have used over many years and in several properties, so I cannot compare it with other products. What I can say is - when I drain any system that has had MB-1 installed, the water runs clear without any significant sign of contaminants. That is good enough proof for me. 12 Sep 2015
Rated 4 out of 5 by Fernox MB-1 Expensive for what it is. Very difficult to determine if it does the job. Let you know in 10years time!! Other than price, all my rating are subjective. 25 Sep 2013
Rated 5 out of 5 by Quality Product Been using Fernox in Heating Systems for 30 years, water drains out clean every time. Cant buy better. 22 Nov 2012
Rated 5 out of 5 by MB-1 To steal a phrase, "It does exactly what is says on the tin/packet" completely thoroughly and adequately describes this EXCELLENT product. I would recommend this product to everyone. 20 Nov 2012
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3 Aug 2015
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, Electrician
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The recommended ‘in-use’ concentration of the product is 4%. Fernox state that that one 4 litre bottle of the MB-1 protector will protect an average sized system (up to ten radiators).
4 Aug 2015
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, Other Trade
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Download more info (pdf)

Brand Fernox
Colour Yellow
Manufacturing Standards KIWA
Model No MB-1
Pack Size 1
Pieces in Pack/Case 1
Product Type Protector
Sealant Adhesive Volume 4 Ltr
Total Product Weight 4299 kg
Volume 4 Ltr