i only have one guitar with P90-style "soapbar" pickups, and they're quite tricky to properly set (in height) if their backside isn't properly spongy-springy-like; ditto goes for the guitar that has "classic-mounted" Filtertron-like pickups, which rely not on springs around screw fittings, but under-belly cushion.
it's not rocket-science, i've tried a lot of different leftovers, from rubber to felt to... really, from cables' insulation layer to sticky doors' and window's gaskets, with varying results, over different lengths of time – then found this.
does what it says on the box, and does it nice and easy.
what's even better: it doesn't seem to dry and die as fast as some really lightweight stuff i've tried.
there's more than one "utility" item selected / produced / boxed by Dieter Gölsdorf's Göldo brand that makes quite a positive improvement on instruments' maintenance and / or functionality – this rubber foam band is another most welcome one!