Practical Sailor's gear and boat reviews take the guesswork out of your buying decisions.

Volume 32
Number 8
August 2006

Sticky Situation

After a year of testing, the proof is in the goop.

About 16 months ago, Practical Sailor kicked off a prolonged test of 23 caulks and sealants, which are so important to boat builders and owners. As shown on the chart (see sidebar), the products included silicones, polysulfides, polyurethanes, acrylic latexes, vinyls, polyethers, and some combinations thereof.

Twenty-three caulks and sealants are put through their paces in a test of elasticity, waterproofing, and adhesion.

The brands mostly are those strong in the marine field—like 3M, Sika, and BoatLife—but also include hardware-store varieties like Elmer’s, GE, and RPM products. …

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