What gutter sealant do professionals use?

[ive]

Hello everyone. I realize that all gutter sealants are not created equal.

What’s a good one that the professionals use.

Thank you.

 

[jack stand]

They use "gutter sealant" OSI is a common brand name in my experience and it's usually silver in color and comes in a large toothpaste type tube. Only applied to the inside of the gutter @ outlets and end caps usually.

 

[ive]

Thank you Jack stand.

 

[NUTTSGT]

No professional but this is what I used. It's been working good for 17 years.

 

[ive]

Thank you Nuttsgt