Features January 2018 Issue

Mildew-resistant Caulks for Boats

We recently tested shear strength of many caulks on many different materials and delivered a few tentative recommendations (See “Marine Sealant Adhesion Tests,” December 2016). Here is the two-year follow-up focusing on resistance to weathering, dirt, and mildew, as well as the ability to maintain a good bond above the waterline when flexed. This is one of nearly a dozen similar tests that we’ve done in recent years. Be sure to see the online version of this article for links to previous reports covering other key characteristics (underwater bonding, sealing teak decks, sealing hatch glazing, etc.).

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