--- product_id: 14992373 title: "Sashco-30501 Pre-Caulking Filler Rope Backer Rod, 1/2-Inch x 100-Feet, Grey" brand: "sashco" price: "$63.15" currency: USD in_stock: true reviews_count: 11 url: https://www.desertcart.us/products/14992373-sashco-30501-pre-caulking-filler-rope-backer-rod-1-2 store_origin: US region: United States of America --- # Closed-cell water resistance 1/2-inch diameter precision 100 feet continuous length Sashco-30501 Pre-Caulking Filler Rope Backer Rod, 1/2-Inch x 100-Feet, Grey **Brand:** sashco **Price:** $63.15 **Availability:** βœ… In Stock ## Summary > πŸ”§ Seal smarter, last longer β€” the pro’s secret weapon! ## Quick Answers - **What is this?** Sashco-30501 Pre-Caulking Filler Rope Backer Rod, 1/2-Inch x 100-Feet, Grey by sashco - **How much does it cost?** $63.15 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/14992373-sashco-30501-pre-caulking-filler-rope-backer-rod-1-2) ## Best For - sashco enthusiasts ## Why This Product - Trusted sashco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Flexible Fit:** Soft, pliable material easily conforms to any joint shape - β€’ **Seal Like a Pro:** Creates durable, professional-grade joints that last - β€’ **Waterproof Shield:** Closed-cell design repels water, protecting your seals from damage - β€’ **Maximize Efficiency:** Fills joints perfectly to reduce caulk usage and save costs - β€’ **Universal Compatibility:** Works seamlessly with all substrates and sealants for versatile use ## Overview Sashco-30501 Pre-Caulking Filler Rope Backer Rod is a 1/2-inch diameter, 100-foot long grey polyurethane strip designed to fill and insulate large caulk joints. Its closed-cell, water-resistant design protects joints from moisture damage while reducing caulk usage. Soft and pliable, it fits easily into joints and complies with ASTM C 1330, Type C standards, making it compatible with all substrates and sealants for professional, long-lasting results. ## Description Product Description Sashco Pre-Caulking Filler Rope Backer Rod, 1/2-Inch x 100-Feet, Grey From the Manufacturer Sashco Sealants 30501 Pre-Caulking Filler Rope (Backer Rod) ## Features - Makes professional joints that last - Helps fill in and insulate large caulk joints and allows the caulking to absorb more movement - Closed cell design repels water to help protect the joint from damage - Complies with ASTM C 1330, Type C - Measures 1/2-inches diameter by 100-feet length - Easy to fit - soft and pliable so it fits into the joint easily - Water resistant - unlike open cell backer rod, it repels water to help protect the joint from damage - Fills the joint so you use less caulk - Fully compatible with all substrates and sealants ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B000DZHF5K | | Best Sellers Rank | #180,563 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #469 in Adhesive Caulk | | Brand Name | Sashco | | Color | Grey | | Customer Reviews | 4.6 4.6 out of 5 stars (381) 4.6 out of 5 stars | | Global Trade Identification Number | 00031525305011 | | Included Components | Building Materials & Ladders;Raw Building Materials;concretes | | Item Form | Strip | | Item Type Name | Pre-Caulking Filler Rope Backer Rod Roll | | Item Weight | 3.84 ounces | | Manufacturer | SASHCO | | Material Type | Polyurethane | | Maximum Gap Fill | 0.5 Inches | | Model | 30501 | | Number Of Items | 1 | | Part Number | 30501 | | Surface Recommendation | surface_recommendation | | Unit Count | 1.0 Count | | Upc | 031525305011 | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** Sashco - **Color:** Grey - **Item Form:** item_form - **Item Weight:** 3.84 ounces - **Maximum Gap Fill:** 0.5 Inches ## Images ![Sashco-30501 Pre-Caulking Filler Rope Backer Rod, 1/2-Inch x 100-Feet, Grey - Image 1](https://m.media-amazon.com/images/I/716uciyptIL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great chinking material! *by on Reviewed in the United States January 15, 2025* This cord can serve several purposes, but was great for my engineered log cabin. While engineered logs are supposed to require chinking, eventually the logs twist out of shape and the gaskets used two decades ago begin fail. We had our logs sand blasted for new finish and the amount of sand inside proved this! This chinking helped re-establish the tightness of our seal so well, we had to crack a window to light our wood stove! Exactly what was looking for…better insulation! ### ⭐⭐⭐⭐⭐ Cuts the cold drafts! *by on Reviewed in the United States February 16, 2023* I live in an older apartment and had bad drafts where the floor trim and carpet meet (weird, I know), because my apartment has a basement underneath and has likely settled, leaving this gap and airflow between the two. Anyhow, I needed something to stuff in the gap to stop the draft, and this worked perfectly! I got the 1/2 inch, 100 feet, and it was plenty. I was able to easily poke it under my floor trim, where it's supposed to meet the carpet, with ease. It filled in the gaps, and I have no more freezing drafts! The money I spent will help cut my heating and cooling, so I'm a very happy camper. The product was easy to shape, bendable, and easy to cut with scissors if needed. ### ⭐⭐⭐⭐⭐ Great product *by on Reviewed in the United States November 3, 2021* This is great closed cell backer rod. I used it to fill gaps in my concrete so no ice would get in there. Used self leveling concrete sealant over this. Worked perfectly. Now I'm looking all over the property to fill gaps so I can use up the roll. I recommend this product! --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/14992373-sashco-30501-pre-caulking-filler-rope-backer-rod-1-2](https://www.desertcart.us/products/14992373-sashco-30501-pre-caulking-filler-rope-backer-rod-1-2) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-10*