"If it sounds too good to be true..." then generally its a marketing lie.

It is the alcohol that is the effective agent in most commercially available sanitisers - if the alcohol evaporates at skin temperature how will it still be present 24 hours later?

If it is one of the other "active" ingredients where is the laboratory evaluation against a recognised European standard to prove this claimed efficacy? Lots of snake oil preparations out there pointing to various global "government" citations BUT none seen to date with actual verified test evidence especially and specifcally for Covid-19.

Absolutely not! If it were it would be positively dangerous. Our skin has its own microbiome. There can be >10,000 bacteria in one sq. cm of skin. They perform a positive function in that they help create a skin surface that help inhibit colonisation by transient micro-organisms. Anything that damages these commensal flora will make it easier for transients to colonise the skin (COVID-10 anyone?) The whole point of alcohol sanitiser is that it only has a relatively short effect on the commensal flora and, by not damaging the skin's natural hydro-lipidic surface film, does not affect the skin's pH and thus reduce its protective capabilities - unlike hand washing which may remove the micro-organisms on the surface but also removcs the hydro-lipoidic film allowing the skin to lose too much moisture and thus create a less effective skin barrier. This is why hand washing should always be followed by moisturising.  If anyone would like more on this just PM me with contact details and I will respond.