SIMONA® Versarod® is a proprietary weld rod that allows seamless fabrication in wet/dry process tool construction. Versarod® allows exhaust plenums to be thermoplastically sealed, welding SIMONA® PVDF to SIMONA® PVDF on the inside of the tool, and SIMONA® PVDF to SIMONA® CRP 1 on the outside of the pipe to cabinet weld. Versarod® also allows PVDF plumbing pass-through to be thermoplastically sealed, removing the need for secondary braces and securements. 


  • Good weld strength and weld ductility
  • Continuous use temperature nominal 60 to 65 °C
  • Allows seamless tool construction and weld sealed SIMONA PVDF plumbing through SIMONA CRP-1 cabinet walls
  • Proven, historical performance with tools still in service since 1999


  • PVDF fittings and plumbing
  • Plenums and pump box walls
  • Wet and dry process tool fabrication
  • Cabinets, casework, tables

Rod Configurations 

  • 4.0 mm (0.156 in) diameter, clear
  • 4.0 mm (0.156 in) diameter, white

Hot Gas Weld Parameters

  • Temp: 380 °C
  • Flow: 60-65 LPM
  • Speed: 0.25-0.50 in/sec
  • Pressure: sufficient pressure should be applied to the tip to produce weld rod ‘wake’
  • Melt viscosity is relatively low. Versarod will appear soft/limp immediately after welding
  • Versarod will begin to ‘set’ after 2-3 minutes, reaching full strength after 10 minutes
  • Priming the weld seam is important to achieve maximum adhesion

SIMONA AMERICA Industries manufactures the widest range of FM 4910 sheet, rod, and welding rod in the industry, featuring SIMONA® CRP-1 material as the leading material for critical applications. All of our compliant materials are designed to satisfy semiconductor process applications without compromise.

Versarod® Weld Rod Chemical Resistance Guideline

CRP-1 to PVDF chemical compatibility and service temperature.

Versarod Maximum Continuous Service Temperature

Versarod® weld rod is serviceable at 65°C, but may have higher use temperature. Depending on configuration, Versarod is limited to 72 to 75 °C use temperature of CRP-1.


  • Direct continuous contact with the above chemicals was assessed at ambient temperature
  • Direct continuous contact was not tested at elevated temperatures or at the maximum recommended use temperature. The above service temperatures are based upon knowledge of historical applications.
  • Because end use varies, SIMONA AMERICA Industries recommends verification and suitability of individual applications. 

Chemical Parameters

Versarod® weld rod is not recommended for prolonged continuous contact with strong oxidizing acids, including:

  • 99% sulfuric acid (H2SO4)
  • 70% nitric acid (HNO3)
  • However, Versarod weld rod performs well in intermittent contact with these acids

Versarod weld rod appears to have good resistance to:

  • 38% hydrochloric acid (HCl)
  • 49% hydrofluoric acid (HF)
  • 85% phosphoric acid (H3PO4)
  • 30% ammonium hydroxide (NH4OH)
  • 45% potassium hydroxide (KOH)
  • 30% hydrogen peroxide (H202)
  • 5:1:1 SC1 and SC2

SIMONA Versarod® Weld Rod Data Sheet