EXCLUSIVE FEATURES OF CASEMENTS UNITS:
• Full 4-1/8" or 4-1/2" Jambs (Wider Jambs Optional)
• Completely Weatherstripped with Bulb Weatherseal to Form a Double Weatherstripped System for Added Performance
• Sash is a Full 1-3/8" Thick
• Shown in Single Glazed, Insulated Glass Optional, (Other Options are Available)
• Truth ® Entry Guard Hardware in White, Bronze, or Brite Brass
• Solid One Piece Redwood Sill
• Sill Pans to Protect Moisture Intrusion
• Wide Selection of Exterior Trim
• Available in Pine, Fir or Pre-primed
While awaiting your answer, I called MD’s Customer Service line. They were quite helpful and said that they don’t make a product with a silicon bulb. The gentleman went further to explain the interaction (chemical) between the vinyl and the latex paint. He recommended a special order of their EPDM Rubber bulb product through Lowe’s or HD.
I’m doing this research for my daughter and son-in-law in Mill Valley, CA, and this may take some time. I’ll keep trying to find the Pemko 297_S or Columbia 320_S, which sounds like the safest bet.