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🧱 Seal smart, build strong — the pro’s choice for flawless joints!
Prosoco R-Guard Joint and Seam Filler is a premium, single-component STPE paste designed to fill and reinforce open joints, seams, and cracks up to 0.5 inches. It combines silicone and polyurethane benefits for a flexible, durable seal that cures in 4 hours and resists water, making it ideal for prepping walls before applying air and water barriers. Trusted by professionals and easy to apply with a gun-grade consistency, it ensures long-lasting protection and seamless transitions in new or existing wall assemblies.



| ASIN | B00OBUXCJ6 |
| Best Sellers Rank | #122,098 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #133 in Industrial Joint Sealants |
| Brand | Prosoco |
| Brand Name | Prosoco |
| Customer Reviews | 4.6 out of 5 stars 158 Reviews |
| Full Cure Time | 4 hours |
| Item Form | Paste |
| Item Weight | 2 pounds |
| Manufacturer | Prosoco |
| Material Type | Silyl-Terminated-Poly-Ether (STPE) |
| Maximum Gap Fill | 0.5 inches |
| Model | 5824052562 |
| Number of Items | 1 |
| Part Number | 70410 |
| Surface Recommendation | Walls |
| UPC | 653429020212 |
| Unit Count | 20 Ounce |
| Water Resistance Level | Water Resistant |
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