Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2021
Dec. 10, 2021
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Trading Symbol PRM  
Security 12b Title Ordinary Shares, nominal value of $1.00 per share  
Security Exchange Name NYSE  
Entity Registrant Name Perimeter Solutions, SA  
Entity Central Index Key 0001880319  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   157,137,635
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity File Number 001-41027  
Entity Bankruptcy Proceedings Reporting Current true  
Entity Incorporation, State or Country Code N4  
Entity Tax Identification Number 98-1632942  
Entity Address, Address Line One 12E rue Guillaume Kroll  
Entity Address, City or Town Grand Duchy  
Entity Address, Country LU  
Entity Address, Postal Zip Code 1882  
City Area Code 352  
Local Phone Number 2668 62-1  
Document Quarterly Report true  
Document Transition Report false