My truck is a 1996 Toyota Landcruiser that is showing its age and I’m always finding ways to keep it going. One problem I had was that the power windows were very slow to go up and down because the rubber around the glass was oxidizing and not as soft. This was especially a problem in the winter when plowing as I would sometimes have to use my hand to help the window go back up. I had been using silicone spray but it’s benefits were pretty short lived. A friend told me to use silicone grease and WOW what a difference.
Now, one tip, get a flux brush or some disposable brush with relative small stiff bristles so you can wipe down all the rubber window channels where the glass slides. Your brush is going to get old rubber and other debris on it. If you put it back in your silcone grease container, you will have a mess – guess how I know this? 🙂 Instead, put some grease on a paper plate or something as an intermediary to dip your brush in. This will not take much – maybe a tablespoon or two at most. I can do all four power windows on my truck with probably right around a tablespoon or just over. You aren’t looking to leave gobs and gobs of the stuff – just a good coating.
So, a warm day helps. Put all the windows down and apply it. Then run each window up and down a few times to get a good coating on everything. You will see a remarkable improvement with the 2nd or 3rd cycling of the windows as everything gets coated. Then just wipe off any residue on the window frames (I leave it on the glass edge myself).
Please note to use silicone grease and not petroleum grease. The petroleum grease can cause the rubber to break down or at least make quite a mess. Silicone grease was designed intentionally to lubricate and protect rubber parts such as seals.
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By the way, this might be an example of being able to save quite a bit by purchasing the silicone grease online. You can check the price of the Mission paste I’ve been using below and others on Amazon compared to what you will pay for silicone grease at your local auto parts store.