Which Filler....

[Crosby99]

Seeking advice on what to do with this crack by the front door

I presume it will be 'fill and then paint', but any more specific advice about what to fill it with/what steps to take so it only needs doing once?

It's not an exterior door - it sits inside the porch.

[ferret50]

Rake out the loose stuff.

2 options

1 fill the gap with sillycone
2 paint with PVA then fill with something like Polyfilla...your local shed will have something...sand back and paint.

[Kwackersaki]

I use this which seems to do the job

https://www.toolstation.com/toupret-fibacryl-flexi...

[Wacky Racer]

Kwackersaki said:

I use this which seems to do the job

https://www.toolstation.com/toupret-fibacryl-flexi...

This.

[andyxxx]

caulk

[darreni]

Use a paintable hybrid like CT1.

[OutInTheShed]

andyxxx said:

caulk

Indeed, I would suggest something a bit flexible that can be painted over.

Maybe first investigate how much movement there is, and whether anything can/should be done about it.
Then clean it up and make good, leaving a gap opened up to maybe 3mm, which can be primed with PVA or whatever, then filled with caulk 'frame filler' or some other flexible over-paintable water based snot.

[119]

It will always crack regardless.

You can either, get the door frame fitted properly, or get a similar coloured upvc cover strip and fit that over the top.

[ARHarh]

Its a door frame silicon is the answer, there is a reason window fitters use it.