Hi
I'm planning to treat the underneath of my car. Question is what's the best to use either Shultz underseal or tetraseal stonechip I'm going to do everything like arches floor etc etc! Advise appreciated.
Underseal or stonechip?
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kam325itouring
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Shiz
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dinitrol stone chip. expensive but best on the market imo 
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Grrrmachine
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Never use shultz. It's bitumen-based, and is great for trapping water against the metalwork of the car.
Ideally you'd use both; a brush-on seam sealer around all the joints (polyurethene-based is best), followed by a stone-chip. Dinitrol products are highly rated, but the closest to the BMW original is a 3M product - you'll find it if you search.
Ideally you'd use both; a brush-on seam sealer around all the joints (polyurethene-based is best), followed by a stone-chip. Dinitrol products are highly rated, but the closest to the BMW original is a 3M product - you'll find it if you search.
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