rockwool in soil

just wondering is is safe to use rockwool in a soiless mixer I have 4 clones in 4x4 rockwool cubes read a few things on the subject which where contradicting so I'm little confused has anyone ever tried and can anyone help me out thanks

Not sure what you mean by using rockwool in soiless mix, if you mean growing seedlings in rockwool, then you can transplant to any other medium.