Nationals MPs say they are in no hurry to reform the coalition as David Littleproud and Sussan Ley hold further talks on a potential reunion of the political alliance.
The two party leaders met again on Wednesday afternoon to thrash out a deal to reunite the coalition, but an agreement has yet to be reached.
The opposition leader said on Wednesday she was confident a deal could be struck within days.
But Nationals backbencher Darren Chester said a deal should not be rushed for the sake of expediency.
"A return letter has gone from the National Party to the Liberal Party in good faith," he told Sky News on Wednesday.
"These are constructive, ongoing conversations and we owe it to coalition voters around Australia now to take our time, to get the reset right."
A sticking point in coalition negotiations has been the need for cabinet solidarity, with all frontbenchers required to vote along party lines.
Ms Ley had called for three Nationals frontbenchers who crossed the floor on hate speech laws to be banned from returning from shadow cabinet for six months.
The opposition leader had previously said she was optimistic about a reunion, while leaving the door open to softening demands for the Nationals
"The coalition can reform this week with conditions that are supported by the majority of my party room," she told reporters in Canberra.
Mr Chester said negotiations to reform the coalition needed to ensure a repeat of a split would not take place.
"We've got to make sure our systems are more robust to withstand those attempted wedge issues by the prime minister," he said.
The Nationals have until Monday to reform the coalition before Ms Ley makes permanent an all-Liberal shadow cabinet.
Insiders believe such moves would entrench the split of the two parties.
Nationals senator Bridget McKenzie said commentary on the negotiations would not be helpful.
"There's red lines for the National Party and there's red lines for the Liberal Party ... at some point there becomes an impasse," she told ABC TV.
"I'm not going to suggest where that is, and that really is between David and Sussan."
The ongoing infighting threatens to drive voters away from the Nationals and into the arms of Pauline Hanson's One Nation, a leading pollster warns.
Recent polls have shown public support for One Nation surpassing the coalition for the first time.
Conservative, working-class voters who had experienced economic decline were flocking to the anti-immigration party out of disillusionment, Redbridge Group director and former Victorian Labor strategist Kos Samaras said.
"The point is revenge, cultural and political revenge," Mr Samaras said.
Former National-turned-One Nation MP Barnaby Joyce cited his defection to the right-wing party as contributing to its surge in support.
"I'm not going to go with faux modesty, I think I'm part of it," he told ABC TV.
"It gives people licence that they have the capacity to, go to dinner and say, 'actually I'm a One Nation voter'."
But Mr Littleproud said he was not fazed about the prospect of One Nation coming for Nationals seats, noting they have been trying to do so for decades.
A Redbridge Group/Accent Research poll, published on Sunday, showed support for One Nation had jumped to 26 per cent, well above the former coalition's 19 per cent primary vote.
Based on the polls, the Nationals risked losing all of their seats in regional NSW and Queensland, where One Nation was expected to perform particularly well, Mr Samaras said.
