You're still poorly wording this idea. As is, what you wrote is wrong. A sacrament doesn't give justification/grace? That's their essential purpose! That's the only reason they exist.
Ok, the way Trent worded it the way they did, is because the sacraments may be received unworthily, as such Trent never says there is certainty of justification or salvation, only that without them there is no justification. They worded it the same way when they mention a desire for the sacraments.
Trent says: Justification
"cannot be effected, without the laver of regeneration, or the desire thereof."
Trent is NOT saying Justification
"will be effected with the laver of regeneration, or the desire thereof" presumably Trent, in her wisdom, worded it this way because the sacrament of baptism my be received unworthily. Although this is how BODers read it, but that's only apparently because they simply cannot see or understand it any other way, they certainly do not see it as Trent taught it.