Chemraz® SD625 is a black, synthetic, high-purity rubber  with temperature and chemical compatibility similar to PTFE.  Chemraz® SD625 parts have high service temperatures (up  to 500°F/260°C), near-universal chemical compatibility, and  extensive compliance coverage. Chemraz® SD625 is our  best-performing seal material for pharma, biotech, cosmetic,  and food processing applications. 

Chemraz® SD625 seals have exceptional service lifetimes in steam-in-place (SIP) applications relative to FKM,  silicone, and EPDM seals. Chemraz® SD625 o-rings  and gaskets typically maintain sealing after thousands  of steam sterilization cycles, orders of magnitude longer  than other materials.

Compliance & Quality 

Parts made from Chemraz® SD625 offer compliance for  pharma, biotech, cosmetic, and food industries:

• Animal Derived, Ingredient-Free (ADI Free) 

• FDA Food Contact Number (FCN) 245 

• FDA 21 CFR 177.2400 (d), Extractive Limitations for  Perfluorocarbon-Cured Elastomers  

• USP <87> and <88> Class VI Biological Reactivity  Tests 

• 3-A 18-03, Product Contact Surfaces in Dairy Equipment,  Sections C & D for Class I Rubber Material 

Upon request, we can advise on Chemraz® SD625  compliance to other standards. When required, our  experienced staff of rubber formulation experts can  develop Chemraz® for additional compliance and  performance requirements.  

Greene Tweed manufactures parts from Chemraz® SD625 in a fully traceable ISO 9001:2015 quality  management system (QMS) using validated,  documented processes.