Excellent. What many people don't realize is that this is required whenever a steel fastener is inserted into an aluminum block. Prevents spark plugs from sticking in aluminum heads. I use this product on any bracket that comes in contact with aluminum, especially after my alternator bolt is glued to the aluminum engine block. To fix it I had to use a Time-Sert thread repair kit which costs about $90. Also feel free to use this for fasteners that may freeze from corrosion.
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