Adey MC1+ Protector Liquid 500ml Option:500ml strongest and longest lasting strongest and longest lasting anti clogging structure Self sharpening design for extreme durability Tough enough to tackle almost any surface Compatible with hand & machine use Ideal for wood Suitable for all heating systems Increased strength makes this a high performance corrosion and scale inhibitor Best in class formulation for multi metal protection Every bottle of MC1+ is performance tested Compatible with all metals Building Regulations Part L compliant Annual top up of MC1+ with filter service is recommended Can be used with ADEY's water testing products The most pH neutralising product on the market which prevents future corrosion and or scale build up 1 dose treats 125L or up to 15 radiators