The only advice I have here is to use a silicone based spray.
All the RV Seal cans I have seen use a water based emulsified silicone as the primary ingredient. Use either the premium RV silicone spray or Protect-All® Slide-Out Rubber Seal foam spray lubricant. I prefer the latter and find it easy to apply, very effective and long lasting.
The slide MECHANISM should only have a dry based (on wet; dries dry) lubricant. NEVER use grease or oil. It will attract dirt and road grime and jam your slide over time.
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Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
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