Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 15, 2020
Document And Entity Information
Entity Registrant Name	FLEXIBLE SOLUTIONS INTERNATIONAL INC
Entity Central Index Key	0001069394
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business Flag	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		12,240,545
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2020