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Old 18th Aug 2017, 6:19 am   #5
David G4EBT
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Join Date: Feb 2003
Location: Cottingham, East Yorkshire, UK.
Posts: 5,736
Default Re: Polystyrene knobs and button repair

Interesting use of the term 'weld'. Welding is the process of melting the parent material (most often metal), and adding a similar material so that the whole joint flows together until it sets and becomes one. I've no experience of JB Weld products, but 'bonding' is not 'welding' - it's sticking things together. All that really matters is whether or not the product is effective.

The info on each product in the range makes it clear which materials that particular product is unsuitable for. Any product which doesn't melt the parent plastic and join it together with a compatible material isn't 'welding' - it's 'gluing'. That said, consider how effective glass-bond glue is in sticking rear view mirrors to car windscreens. I've never know one fall off.

I see that the products in the range that I looked at cure to 'off-white' which might be a problem with transparent plastics where appearance is important. Suffice to say that it worked for Mike - hence, the thread.

I've never been overly impressed with Araldite products.
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