Diamond-Hard Solutions
Joint & Seam Filler
Joint & Seam Filler
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Joint & Seam Filler is a high-performance, fiber-reinforced detailing compound specially formulated to fill cracks, gaps, and transitions in wall assemblies. Designed to provide a solid foundation for fluid-applied flashing membranes, air barriers, and waterproofing systems, it offers the flexible reinforcement needed to span irregular openings and create a seamless surface.
Ideal for preparing sheathing joints, panel transitions, and other vulnerable areas, Joint & Seam Filler delivers strong adhesion and long-lasting durability. It ensures continuous, gap-free support where it's needed most—helping maintain the integrity of the entire building envelope.
Use it on its own or as part of a complete R-Guard system to maximize air and moisture control performance.
Available in 20oz
Product Data Sheet
Safety Data Sheet
