I don't understand, neg. reviews. Great product, like everything I've used. Natural rubber magnets are not as strong as metal magnets, and a narrow rubber magnet has less power than a wide one. But a long strip of it adheres perfectly to a metal surface. Spoke to a tech support engineer about the adhesive. This is good quality. For a long-term bond, apply pressure for more than 24 hours while curing. We use this on our magnetic backed LED strips at wolf-lighting.com.
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