Prime Minister John Key said all 12 countries involved in the TPPA walked away wanting more.

Prime Minister John Key says he would prefer for Labour to support the Trans-Pacific Partnership (TPPA), given the two parties have been "locked at the hip historically when it comes to trade deals".

"In the end if Labour don't vote for it, it says a lot more about Labour than it says about TPP. It just means they're not thinking like an alternative Government - they're thinking like the Opposition," Key said.

The monster trade deal was signed off in Atlanta last week after five years of intense negotiations that were recently stalled as the 12-member countries fought over patent protections on biologics and dairy.

Labour set out five "non-negotiable" conditions for the Pacific-wide trade deal, including protection for Pharmac and the right to restrict house sales.

On Monday Labour leader Andrew Little met with Trade Minister Tim Groser to discuss the details of the deal and determine whether they could support it.

While there will be a national debate of interest on the TPPA it won't be binding.

Key said Labour only needed to look to comments by its former leader, Helen Clark, to know that the deal was a must.

"She made it clear New Zealand couldn't be left out of the TPP and she's absolutely right."

The full text of the agreement will be released in the coming weeks but for now Key said Groser had already released the main points.

"Concluding the TPP is significant for a lot of reasons. By the time the TPP is fully enforced, 93 per cent of tariffs will be eliminated on New Zealand exports to the top five trade countries," he said.

"People might say we didn't get everything we wanted from the TPP, but that's what all other 11 countries will be saying as well, and in a big negotiation like this there has to be some give and take.

"But in the end we got a very good deal for New Zealand," Key said.