Devfus Foam !!link!! Crack Link

A: Yes, but only for hairline surface cracks. Use a high-quality elastomeric caulk (e.g., Sikaflex or OSI Quad). Standard acrylic caulk will crack again within one season.

Standard Devfus foam (orange or yellow) is not UV stable. Within 2-4 weeks of sunlight exposure, the surface oxidizes, becomes brittle, and cracks. This is technically a , but users often misidentify it as a structural failure. Devfus foam crack

If the foam is near a window, doorway, or foundation edge, cover it with wood trim, stucco, or a specialized UV-resistant foam coating. Exposed foam is a ticking time bomb for cracking. A: Yes, but only for hairline surface cracks