01 April 2021
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Permabond highlights value of F201 anaerobic sealant

Anaerobic sealants are characteristically very rigid, hard adhesives that work well in compression, torsion and shear but are notoriously brittle and unsuitable in applications where there could be peel or cleavage forces. When bonding dissimilar metals where differential expansion and contraction could be an issue (especially over a broad temperature range or where there is sudden thermal shock), a regular anaerobic adhesive may struggle to flex to accommodate this change in dimension.

But not Permabond F201, which contains a unique rubber toughening system that makes it flexible enough to cope in applications where there are high peel stresses, thermal shock or differential expansion and contraction issues. Typical peel strength of F201 on aluminium is 100 N/25mm – a normal anaerobic sealant would be less than a tenth of that.

Permabond F201 is said to be a favourite of boiler manufacturers, copper cylinder manufacturers and installers, and is said to be ideal for use on copper and brass pipework connections, even when bonded to other metals. It avoids having to weld, braze or solder, is much easier to achieve leak free joints without any pin prick weld hole issues and there is no need for a naked flame or high-risk process.

Other benefits of Permabond F201 include:

  • Single component – no need to mix
  • Cures fully at room temperature on close-fitting metal parts
  • Handling time on mild steel is less than 15 minutes
  • WRAS approval – safe for use with drinking water systems

If the viscosity of F201 is not suitable, both lower viscosity (Permabond F200) higher viscosity (Permabond F202) grades are available.

Products are available in 10 x 50ml bottles, 5 x 200ml bottles and 1 x 2 litre bulk.

Author
William Dalrymple

Related Companies

Permabond Engineering Adhesives Ltd

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