Today we’re focusing on a Permabond classic, and one of our most popular products for years – Permabond 737. This toughened cyanoacrylate, also known as ‘Black Magic’ due to its colour and fantastic adhesion abilities, has been used far and wide and continues to be sought out as a reliable bonding solution in many industries.
Permabond 737 is fairly unique amongst cyanoacrylates due to its toughening, colour and flexibility. Compared to typical cyanoacrylates, this adhesive offers a much higher temperature resistance (up to 120°C), peel strength and impact resistance. Cyanoacrylates are normally brittle adhesives, but with a peel strength of 40-60 N/25mm and impact strength of 5-10 kJ/m², 737 is far from brittle.
In addition, due to 737’s toughening and greater flexibility, this adhesive is ideal for bonding dissimilar surfaces. It is much less likely to be affected by thermal shock or differences in substrate expansion and contraction coefficients. It’s also good on zinc surfaces – where conventional cyanoacrylates tend to snap straight off of these, 737’s flexibility allows it to better adhere to this often-tricky substrate.
737 adheres well to a wide variety of substrates. Its rubber toughening makes it particularly suitable for bonding rubber. As well as this, it has good adhesion on many metals and plastics. In combination with Permabond POP Primer, it bonds very well to PTFE, PP, PE and even silicone.
There have been many industry applications for Permabond 737 – it would be an exhaustive list to write them all here, but some examples include:
…and many more!
If you’re in the UK and would like to try out Permabond 737, you can buy a sample cartridge on our webshop HERE.
If you’d like to find out more about this adhesive or to discuss your application, please get in touch with us!
