Viton™ GFLT-600S* fluoroelastomer is a 67% fluorine,  peroxide-cured, low temperature fluoroelastomer (FKM).  Viton™ GFLT-600S utilizes the latest technology from  Chemours, Advanced Polymer Architecture (APA),  which includes a novel peroxide cure site along with an  optimized molecular weight distribution.

Features 

• Cures exceptionally fast to a high state of cure 

• Improved mold release/mold fouling properties 

• Improved mold flow and less shear sensitivity for a  65 Mooney peroxy-cured FKM 

• Excellent physical properties with high elongation, both  original and aged 

• Improved water resistance/lower volume swell in water 

• Excellent compression set resistance with either low  or no post-cure  

Processing 

A load factor of 72%+ for internal mixing of Viton™ GFLT-600S is preferred. The suggested process  aids for Viton™ GFLT-600S are 0.75 phr of Struktol® HT290, either alone or in combination with 0.5 phr of  PAT-777, or combinations of 0.5 phr Armeen® 18D  with carnauba wax or Struktol® WS280. The use of  TMAIC (trimethallyl isocyanurate) is NOT suggested, as  it causes poor mold release and high compression set.  Viton™ Curative No. 7 (VC-7) is the suggested coagent for  all Viton™ GFLT-600S compounds and is usually used at a  3 phr level or lower, unless high modulus is needed. High  levels of VC-7 can bleed out and cause molding flaws. A  peroxide level of 1.5 to 2 phr is suggested for this fast  curing FKM polymer.