Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 30, 2020	Jun. 30, 2019
Document And Entity Information
Entity Registrant Name	FLEXIBLE SOLUTIONS INTERNATIONAL INC
Entity Central Index Key	0001069394
Document Type	10-K/A
Document Period End Date	Dec. 31, 2019
Amendment Flag	true
Amendment Description	The purpose of this amended report on Form 10-K/A is to include the audit report of MMP LLP, Chartered Professional Accountants, on the Company’s financial statements for the year ended December 31, 2018.
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
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 Public Float			$ 33,602,409
Entity Common Stock, Shares Outstanding		12,240,545
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019