Hello Volfan
Are you asking if you can use the Graco 3400 to spray Seal Coat material…in other words…
Do you want to spray Seal Coat material through the Graco 3400?
If that’s the question…please don’t do that.
Without checking the particulars…don’t do it.
You were right to go with your gut = “uneasy”.
Again…don’t do it.
Your friend.
Dan
