The 21-year-old loose-head prop played in the World Cup last year - and also against the Warriors in a pre-season match in Nova Scotia last August.
He has been training with the squad since arriving in Glasgow on Sunday.
"I talked to DTH [van der Merwe], Connor [Braid] and Taylor [Paris] and they all had good things to say about the club," said Sears-Duru.
"Glasgow play a really good style of rugby and I'm glad to be part of it.
"I'm still young, so hopefully I can learn a lot here and become a better player and continue to play for Canada and do well for Glasgow."

Mhairi Black won the Paisley and Renfrewshire South seat for the SNP in last month's general election.
The 20-year-old sat her final exam on Scottish politics shortly after being elected.
She graduated along with the rest of her class in a ceremony at the university on Friday.
Ms Black posted a photograph of herself in her gown on Twitter.
She wrote: "Overwhelmed by all the messages of support. They're really appreciated. It's been a great day for everyone involved."
Her graduation came seven weeks after being elected MP for Paisley and Renfrewshire South.
The student had yet to sit her final exam when she ousted Labour's Douglas Alexander to become the youngest member at Westminster since the Reform Act of 1832.
She won her seat by 5,500 votes after overturning former Shadow Foreign Secretary Douglas Alexander's 16,000 vote majority.
The MP admitted recently that it was "quite bizarre" returning to university after being elected an MP.
Speaking on BBC Radio Scotland, she said: "It was a brass neck walking into a room with people I've been studying with for years and they're all pulling their hair out applying for a million and one jobs and I'm like, 'Hi guys, how's it going?'."
A spokesman for the University of Glasgow said: "We would like to congratulate Mhairi Black, as we would all of our students who are graduating this summer.
"They have all worked extremely hard to earn their degrees and we wish them the very best for their future careers."

Billy Mankelow was found in a railway arch, on Swinegate near Commercial Garages, at 03:20 BST on Saturday. Police said he had been assaulted.
The 20-year-old from Tonbridge, Kent had surgery but died on Sunday.
A 31-year-old man from Leeds has been arrested on suspicion of murder and is being held in police custody.
Det Insp Mick Jackson, of British Transport Police, said Mr Mankelow had been living in the Hyde Park area of Leeds.
He added: "Our thoughts are with Billy's family at this difficult time."

The position, in her Edmonton constituency office, will now be re-advertised with a Â£9.40 an hour salary.
"Kate does not believe in paying anyone less than the London Living Wage," a spokeswoman said.
Ms Osamor, who was promoted to Labour's front bench in Jeremy Corbyn's reshuffle, campaigns against low pay.
The original advertisement, on the W4MP jobs board, for a constituency intern, listed responsibilities including " community-based projects relating to the constituency", gathering and evaluating data and "general administrative support".
It asked for degree-level qualifications, "enthusiasm" and "commitment to the full duration of the role". The salary was listed as "expenses" and it was described as a "voluntary role".
The advert was withdrawn after Ms Osamor, who entered Parliament in May's general election, came under fire from campaigners in an International Business Times article. Tanya De Grunwald, a campaigner for fair internships and founder of careers website Graduate Fog it was "astonishing" that MPs were still failing to connect the dots between their political principles and their own hiring practices.
Ms De Grunwald said it was "great" that the ad had been taken down but she said it was "disappointing that mistakes like this are still happening when surely everyone is aware of how unfair unpaid internships are by now. When you post an ad for an unpaid role you should know in your gut that it's wrong."
She said MPs needed to "sort out proper processes for hiring these roles so errors and misunderstandings like this can't happen".
Canada international Djustice Sears-Duru has signed a contract with Glasgow Warriors until the end of the season.
[NEXT_CONCEPT]
The youngest MP in the House of Commons has graduated with a first class honours degree in politics from Glasgow University.
[NEXT_CONCEPT]
A man has been arrested on suspicion of murdering a 20-year-old found with severe head injuries near Leeds railway station.
[NEXT_CONCEPT]
Labour's shadow equality minister Kate Osamor has withdrawn an advert for an unpaid intern blaming a "misunderstanding" in her office.