Sikaflex variants

[dunedin]

I have a job to do on the rudder stock seal for which the manufacturer recommends using Sikaflex 221.

I already have Sikaflex 291i, but struggling to find out the difference between this and Sikaflex 221 - even reading the datasheets they seem very similar.
https://industry.sika.com/content/dam/dms/nz01/m/sikaflex_-291i.pdf
https://industry.sika.com/content/dam/dms/au01/p/sikaflex_-221.pdf

Is there any material difference ?

 

[jwfrary]

It has a wheel mark!

Supposedly has UV more UV resistance I heard but never seen anything to prove it.

I use sika on decks

3m 4200 on everything else that doesn't need silicone in which case its geocell

 

[awol]

I have a job to do on the rudder stock seal for which the manufacturer recommends using Sikaflex 221.

I already have Sikaflex 291i, but struggling to find out the difference between this and Sikaflex 221 - even reading the datasheets they seem very similar.
https://industry.sika.com/content/dam/dms/nz01/m/sikaflex_-291i.pdf
https://industry.sika.com/content/dam/dms/au01/p/sikaflex_-221.pdf

Is there any material difference ?

221 is more suited to Scottish weather

 

[dunedin]

221 is more suited to Scottish weather

Thank you for your helpful technical input and insight

The Sikaflex is intended to go where the sun doesn’t shine anyway (on the boat!)

 

[awol]

Thank you for your helpful technical input and insight

The Sikaflex is intended to go where the sun doesn’t shine anyway (on the boat!)

Like I said, Scotland!