Filler Metal Name	Typical Application
Sil-Fos 18	A ternary eutectic filler metal for joints where good fit-up can be maintained and low melting point is of prime importance. Clearance: .001" to .003" (.025 mm to .076 mm). Very fast flow.
Sil-Fos	For use where close fit-ups can not be maintained and joint ductlity is important. Recommended joint clearance: .002" to .005" (.051 mm to .127 mm). Slow flow. The only phos/copper silver filler metal available in strip or sheet form.
Sil-Fos 6	A very fluid filler metal for close fit-up work. Low melting range makes it ideal where temperature is a factor. Recommended joint clearance: .001" to .003" (.025 mm to .076 mm). Fast flow. Lowest melt and flow in the minimum silver class.
Sil-Fos 6 M	Recommended for use where close fit-up cannot be maintained. Has the ability to fill gaps and form fillets without affecting joint strength. Recommended joint clearance: .002" to .005" (.051 mm to .127 mm). Slow flow.
Sil-Fos 5	Designed primarily for those applications where close fit-ups cannot be maintained. It has ability to fill gaps and form fillets without adversely affecting joint strength. Recommended joint clearance: .003" to .005" (.076 mm to .127 mm). Slow flow.
Sil-Fos 2	A filler metal with comparable claracteristics to Fos-Flo 7. Recommended joint clearance: .001" to .005" (.025 mm to .127 mm). Medium flow.
Sil-Fos 2 M	Has ability to fill moderate gaps in poorly fitted joints. More ductile than Fos-Flo 7 or Sil-Fos 2. Intended for use on copper tube headers and similar applications where a sleeve fit is not practical. Recommended joint clearance: .002" to .005" (.051 mm to .127 mm). Slow flow.