Latest / Architect Exam Podcast
069 - Sealant Types, Backer Rod, and Joint Design for Buildings
Which sealant goes where on the building envelope? This episode covers every sealant type, backer rod, and how to design joints that actually work.
We break down the five main sealant families: silicone, polyurethane, polysulfide, acrylic, and MS polymer. Each one has a personality, a best use, and a catch. You'll learn why silicone can't be painted, why polyurethane hates UV, why polysulfide smells like rotten eggs, and when MS polymer gives you the best of both worlds.
Then we get into joint design, because even the best sealant fails if the joint is wrong. We cover backer rod (open cell…
The skinny
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