Marine Sealant Adhesion Tests - Practical Sailor
Since 1974, Practical Sailor’s independent testing has taken the guesswork out of boat and gear buying.
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Great article on marine sealants - Practical Sailor (2016/2022).
One of the surprises: About 3M 5200: ".....It did not bond well to aluminum or to some plastics...... We’ve also found that it does not bond to stainless steel as well as some other products."