Join Date: Dec 2009
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Which Undersealant and is it worth doing
I notice you can buy various types of Undersealant, main one is the Hamerrite Waxoyl, Carplan Underseal.
I have come across the following Tetrosyl Tetra Schutz, which from the marketing stuff says its for protecting the under seal from Rust, stone chips?
If your underseal has become compromised, then what one should be used?