Low modulus neutral cure sealant advice needed

[randers]

Hello everyone. I need to replace the sealant around my upvc doors & windows, the old stuff having gone grey and now showing visible gaps.
Which are the best ones to go for (or conversely the ones to avoid), as there always seem to be better/worse products for any job!
A decent DG company near me uses ARBO but online I see mixed reviews on it so hope to pick up your experience before going to the cost & effort of starting the work. Thanks for your help.

 

[crank39]

Keep away from own brand stuff like no nonsense from screwfix. Dow Corning always gets a good mention, I've used soudal, Wurth, unibond all with results as expected