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It's just like another component placed on the anti-static mat, right? This should work at providing an inexpensive heat-resistant and anti-static workbench area?

All the 'anti-static' heat resistant mats I found explain in the comments about how they are not really anti-static. And all the inexpensive, true EDS, anti-static mats are not heat resistant. (I'm sure there is one out there that has both, but it's likely out of my price range.)

Therefore, placing a $20 heat resistant mat on a $20 EDS anti-static mat would be the ideal choice? Is there something I'm not considering?

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    \$\begingroup\$ Your standard rubber ESD mat is heat resistant, but yes they tend to be pricey. You can use wood as a cheap alternative (not plywood). Or maybe a thin piece of wood on top of a metal plate. \$\endgroup\$
    – DKNguyen
    Commented Oct 5, 2020 at 13:34
  • \$\begingroup\$ Place a cat on top of an ESD mat, then pet the cat for a while. You'll build up a charge still. The word anti-static is unfortunate, because in case of ESD equipment it means "doesn't generate ESD in itself" and not "magically removes static charges occurring in other equipment". \$\endgroup\$
    – Lundin
    Commented Oct 5, 2020 at 13:52
  • \$\begingroup\$ This ESD mat is within your $40 budget. Cut smaller than your normal sized bench mat for use in trays, but it's the real deal. mouser.com/ProductDetail/Desco/… Do not forget the ground kit which is separate since it doesn't come with one (being meant for use in trays) \$\endgroup\$
    – DKNguyen
    Commented Oct 5, 2020 at 13:53
  • \$\begingroup\$ @DKNguyen My price range is just less than hundreds of dollars. Since your first reply, I found this nice $45 all-in-one: digikey.com/en/products/detail/bertech/2059T-18X24GNKT/11680735 \$\endgroup\$
    – adamaero
    Commented Oct 5, 2020 at 18:58
  • \$\begingroup\$ @adamaero you can't really call that one "heat resistant" \$\endgroup\$
    – jsotola
    Commented Oct 5, 2020 at 19:47

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No, it would not.

There's no conductive path through the silicone mat, so all having a proper one underneath it does is create a weak capacitor to ground, which doesn't help you.

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