upgrade spiral balance

A handy person from Saint Charles Missouri says:
I am in the process of cleaning and fixing my 22 year old double hung vinyl windows. The sash movement is very hard and cleaning the frame rails and lubricating with "Blaster Silicone spray" has helped. The pivot shoe (15-015)moves better now but still some friction. The glass (31x33) and lower sash weighs 30lbs, the spiral balance (33inch) has red tip. I have ordered tool (75-006) and hope to re-tension the window. My questions: Is there a better lubricant? And would you suggest black tip spiral balances? Is there a local supplier of your products in my area 63304? Do you have replacements for the attached pictures? (Lower window slide & release)
User submitted photos of a tilt latch.
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Paul from SWISCO responded:
Silicone is the best lubricate you can use for window tracks. It doesn't collect dirt like oil. Being a vinyl window, I think you should consider our 15-046 pivot shoe instead of our 15-015, but I would like to see a photo to confirm.

The S600-33 with a Red Tip is for sashes weighing 12 through 30 pounds, and the Black Tip can support 31 through 40 pounds. Since the manufacturer used Red and it lasted this long, I would stay with Red.

Regarding the internal latch, it is very difficult to match. Service people usually replace them with a surface mount like or 26-195 and 26-196, or 26-228 and 26-229. If you just need the thumb lever look at our 26-119 and 26-234. Compare the width and length of the prongs.

I do not have any contacts for you in your area.
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