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I am going to use a combination of both. I recently removed my concrete slab to my new place and during the de-installation one of the bolt concreted in broke. I will use self tappers to fix down the corner that broke.
In my time carry out installation of payphone we started to use Chemset on nearly all jobs, although after a period of time and testing we found the self tappers worked well for floor mounted installations. Instead of carrying the weight its job was only to hold down the product. Chemset was used extensively on wall mounted applications.
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