The cladding installed on Grenfell Tower was also used on other buildings that have been hit by fires around the world, the BBC has learned.
The exterior cladding, added in 2015, had a polyethylene - or plastic - core instead of an even more fireproof alternative, BBC Newsnight understands.
High-rise buildings in France, the UAE and Australia that had similar cladding have all been hit by fires that spread.
Rydon, which completed the renovations, said the work met all fire regulations.
They also insisted that, building control and safety standards had been fully met.
And Harley Facades, the company that fitted the panels to the building, said in a statement: "At this time, we are not aware of any link between the fire and the exterior cladding to the tower."
The west London tower block was refurbished at a cost of almost £9m.
The exterior of the 1970s-built tower was modernised with replacement windows, while additional homes were added using vacant space in the building.
Police have warned they may never be able to identify all of the people who died in the fire that engulfed a west London block of flats.
Emergency services are to spend a third day searching for bodies in the burnt-out Grenfell Tower in North Kensington.
Seventeen people are known to have died but that figure is set to rise, with fears the death toll could exceed 60.
Fire chiefs say they do not expect to find more survivors, while PM Theresa May has ordered a full public inquiry.
Police said on Thursday that they had launched a criminal investigation into the fire.
The prime minister - who faced criticism for not meeting survivors of the tragedy on a visit to the scene on Thursday - said the victims "deserve answers".
The Queen and Prince William visited a relief centre for Grenfell Tower fire victims, while the missing could number as many as 76, the BBC understands.
Their visit to the Westway Sports Centre comes after police say some of those killed may never be identified.
Police have confirmed that at least 30 people have died as a result of the blaze at the west London flats.
Metropolitan Police Commander Stuart Cundy said that of those who were killed, one died in hospital.
He also said there was nothing to suggest that the fire was started deliberately, and that everyone in hospital has now been identified.
Protests are being held in London as residents demand support for those affected by the Grenfell Tower fire.
Between 50 and 60 people stormed Kensington and Chelsea Town Hall as members of the public said the homeless needed help "right now".
Crowds gathered outside a hall where PM Theresa May met survivors and protests have also been held at Downing Street.
Mrs May has sanctioned £5m for clothes, food and emergency supplies while the death toll has risen to at least 30.
The BBC understands those missing could number about 70, with the 30 likely to be among that number. Three of those who died have been identified.
The first protest began at around 15:00 BST at the town hall and scores have since joined it.
At around 16:30 BST, people began to rush up the steps and make their way into the building.
One member of the public said: "Nobody knows what is happening. People are so angry. Those people shouldn't be sleeping in the street".
Mustafa Al Mansur, who organised the protest, read a statement from the council which promised to rehouse as many people locally as they could and to provide funding for those affected.
But he called the response "flimsy" with "no concrete answers" - especially on the question of number of residents who lived in the flats.
"The people were not satisfied with the answers," he told BBC News. "The people were getting frustrated and they walked towards the building. They did not force themselves inside. They got inside the main building and were in the foyer, just speaking."
Police then arrived on the scene and formed a barricade, which Mr Al Mansur said led to "physical confrontation" between the two sides.
There were then angry scenes outside the Clement James Centre, in North Kensington, where the meeting with the prime minister and residents of the tower had been held.
The Press Association reported one woman was crying at the scene saying it was because the prime minister had declined to speak to anyone outside.
Dozens of demonstrators surged towards the entrance and there were scuffles outside as organisers appealed for calm.
Mrs May had faced criticism for not meeting with survivors in the immediate aftermath, unlike Labour leader Jeremy Corbyn and Mayor of London Sadiq Khan.
Asked about the reaction of the crowd, Mrs May defended the government's response.
"What I am now absolutely focused on is ensuring we get that support on the ground," she said. "The government is making money available, we are ensuring we are going to get to the bottom of what has happened, we will ensure that people are rehoused. We need to make sure that actually happens."
Large crowds of people also gathered in Westminster and made their way to Downing Street. The crowd has been heard chanting, "Justice for Grenfell", along with anti-government slogans, including "May must go" and "blood on your hands". A march started making its way down Whitehall but was halted by a cordon of police officers outside Downing Street itself.
The £5m Grenfell Tower Residents' Discretionary Fund, announced by Mrs May, includes the aim to rehouse residents within three weeks as close to where they lived before as possible, to pay for temporary housing in the meantime and to provide extra financial assistance.
During her meeting with survivors, the PM also said they would be consulted on the terms of the public inquiry announced on Thursday and receive state funding for legal representation.
Mrs May said: "Everyone affected by this tragedy needs reassurance that the government is there for them at this terrible time - and that is what I am determined to provide."