After unsuccessful polygel and base coat purchases on marketplaces (everything leaked, cracked, and peeled off quickly), I turned to nail artist chats for advice. Everyone praised Saga Professional for its density and durability. I found the entire line at
https://purepros360.com/collections/saga – prices range from 15-20 CAD, authentic, fast delivery. I ordered a trial set: the polygel evens out perfectly, and the coating lasts for a month. Now I always buy my manicure supplies there.