Reapplying SPF over makeup every 2 hours of sun exposure remains the dermatologist standard.
Dermatologists say reapplication is what keeps protection up across the day, so the realistic goal at a desk is a workable touch-up — powder or stick — every couple of hours of real sun exposure.
Questions we get a lot
Do SPF setting powders and sprays work for reapplying at a desk?
They can help with reapplication but are easy to under-apply, so they shouldn't be your only or first layer. Sprays must be applied generously and rubbed in (never inhaled); powders give light touch-ups. Start the day with a generous cream or lotion sunscreen, then top up over makeup.
How do I reapply sunscreen over makeup during the workday?
Use a powder or spray SPF, or a cushion/stick sunscreen, pressed (not rubbed) over makeup about every two hours of meaningful sun exposure. Near a window or stepping outside counts; a full day at a shaded desk needs less frequent touch-ups than time by the glass.
Do I need to reapply sunscreen if I'm indoors all day?
If you're well away from windows, the morning application usually lasts. But UVA passes through glass, so anyone seated near a sunny window should still reapply over the course of the day. Match your touch-up frequency to how much real sunlight reaches your skin.
r/MakeupAddiction: 'Are SPF setting sprays legit for reapplication?'
