If you use a filler and cover it immediately, will there be any problems?
Cement, concrete, plaster-of-paris, epoxy:
These two-part fillers set by an internal chemical reaction, not by contact with the air, so you can cover them immediately after placing them with no ill effects.
Paste, oil-based putty, white-glue and sawdust, &quot;mud&quot;, no-gaps etc
These fillers set by a reaction with the air, or by evaporation
If you cover them curing time will be extended.