--- product_id: 421102842 title: "Tondiamo Caulk Saver Foam Backer Rod Gap Filler Concrete Rope Caulk Gray Sealant Backing Rod for Fence Wall Gap Floor Window Door Windproof Home Repairing(1/2 Inch x 30 Ft)" brand: "tondiamo" price: "€ 50.90" currency: EUR in_stock: true category: "Tondiamo" url: https://www.desertcart.hr/products/421102842-tondiamo-caulk-saver-foam-backer-rod-gap-filler-concrete-rope store_origin: HR region: Croatia --- # Flexible, bendable foam for easy fitting Closed-cell foam resists water absorption 30 ft length for versatile use Tondiamo Caulk Saver Foam Backer Rod Gap Filler Concrete Rope Caulk Gray Sealant Backing Rod for Fence Wall Gap Floor Window Door Windproof Home Repairing(1/2 Inch x 30 Ft) **Brand:** tondiamo **Price:** € 50.90 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal smart, save time—your go-to gap filler for flawless finishes! ## Quick Answers - **What is this?** Tondiamo Caulk Saver Foam Backer Rod Gap Filler Concrete Rope Caulk Gray Sealant Backing Rod for Fence Wall Gap Floor Window Door Windproof Home Repairing(1/2 Inch x 30 Ft) by tondiamo - **How much does it cost?** € 50.90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/421102842-tondiamo-caulk-saver-foam-backer-rod-gap-filler-concrete-rope) ## Best For - tondiamo enthusiasts ## Why This Product - Trusted tondiamo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal gap filler:** Ideal for walls, windows, doors, pavements, and even creative DIY crafts - • **Effortless installation:** Simply press into gaps before caulking—no tools or hassle required - • **Long-lasting 30 ft roll:** Enough length to tackle multiple projects without constant replacements - • **Flexible & bendable design:** Easily molds to any gap or joint for a perfect seal every time - • **Water-resistant closed-cell foam:** Prevents moisture intrusion, ensuring durability and protection ## Overview The Tondiamo Caulk Saver Foam Backer Rod is a 30-foot long, 1/2 inch diameter gray foam rod made from closed-cell, water-resistant material. Designed for professional and DIY use, it flexibly fills gaps in walls, windows, doors, and pavements, providing a neat surface for caulking while reducing sealant usage. Lightweight and easy to install, it’s a versatile solution for durable, windproof, and moisture-resistant home repairs. ## Description Features:Gift choice:The concrete space filler is a nice present choice for friends, relatives, family who has the need for caulking, sending your care and love.Bring convenience: Bendable foam rod can be applied to fill the joints and reduce the amount of caulking agent, practical and convenient.Specifications:Material: foamColor: graySize: as shownPackage includes:1 x Backer rodNotes:Manual measurement, please allow slight errors on size.The color may exist a slight difference due to different screen displays.Winding risk, keep away from little kids. ## Features - Quality Material: this caulk backer rod is made of quality foam, which is round, closed cell, low density, safe to use, possessing nice flexibility and can be bendable, won't absorb water, you can use it for filling spaces or joints - Long Enough: you will receive 1 piece foam backer rod approx. 30 feet long, which can be easily trimmed to the right size with scissors according to your actual needs, sufficient length can meet your daily needs and replacement - Effortless to Assemble: the backing rod is soft and flexible, just get the desired part and put it into the space, and press to make it well fit before applying sealant, simple and effortless to assemble - Widely Applicable: filler rope is suitable for most kinds of cracks, such as pavement cracks, wall joints and foundations, which can provide a neat surface for caulking projects; Classic gray color can be matched with various styles - Versatile to Use: the gray space filler can be applied for glass installations, expansion joints, door and window seam, and pavement joints, you can also use it to protect dog ears, make ring holders, complete craft projects and more ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09QYDDFF8 | | Best Sellers Rank | #27,319 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #14 in Rope Caulk #44,980 in Hardware | | Brand Name | Tondiamo | | Color | gray | | Customer Reviews | 4.4 4.4 out of 5 stars (67) | | Item Form | Rod | | Item Weight | 0.13 kg | | Manufacturer | Tondiamo | | Material Type | Foam | | Maximum Gap Fill | 0.5 inches | | Model | Tondiamo-Foam Backer-852 | | Number of Items | 1 | | Part Number | Tondiamo-Foam Backer-852 | | Surface Recommendation | Walls | | Unit Count | 1 Count | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** Tondiamo - **Color:** gray - **Item Form:** Rod - **Item Weight:** 0.13 kg - **Maximum Gap Fill:** 0.5 inches ## Images ![Tondiamo Caulk Saver Foam Backer Rod Gap Filler Concrete Rope Caulk Gray Sealant Backing Rod for Fence Wall Gap Floor Window Door Windproof Home Repairing(1/2 Inch x 30 Ft) - Image 1](https://m.media-amazon.com/images/I/91ow5ZU8KOL.jpg) ![Tondiamo Caulk Saver Foam Backer Rod Gap Filler Concrete Rope Caulk Gray Sealant Backing Rod for Fence Wall Gap Floor Window Door Windproof Home Repairing(1/2 Inch x 30 Ft) - Image 2](https://m.media-amazon.com/images/I/81OenfB4s0L.jpg) ![Tondiamo Caulk Saver Foam Backer Rod Gap Filler Concrete Rope Caulk Gray Sealant Backing Rod for Fence Wall Gap Floor Window Door Windproof Home Repairing(1/2 Inch x 30 Ft) - Image 3](https://m.media-amazon.com/images/I/71CmMTGcT6L.jpg) ![Tondiamo Caulk Saver Foam Backer Rod Gap Filler Concrete Rope Caulk Gray Sealant Backing Rod for Fence Wall Gap Floor Window Door Windproof Home Repairing(1/2 Inch x 30 Ft) - Image 4](https://m.media-amazon.com/images/I/71YB9G8E96L.jpg) ![Tondiamo Caulk Saver Foam Backer Rod Gap Filler Concrete Rope Caulk Gray Sealant Backing Rod for Fence Wall Gap Floor Window Door Windproof Home Repairing(1/2 Inch x 30 Ft) - Image 5](https://m.media-amazon.com/images/I/81n5W3QpcaL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: can you use crack stix sealent over the top? crack stix is applied with the use of a torch to melt and flow mostly around pools** A: The basic purpose of this kind of spacer is to keep anything from restricting the movement of the floor when and if it needs to expand. Anything you'd put over or into the foam that would harden, would defeat the purpose of providing the "free space" for floor expansion/contraction and thus more likely cause the floor to buckle or otherwise fail or deform. This is true for wood AND tile floors. For your application, an "installed gap" - left free of "trash" - and then filled with VERY flexible filler might suit you better. TOTAL floor failure is possible if it ever needs to move a lot - and can't. I mean TOTAL. Nature, you don't mess with... Seen it happen a few times. "Dang!" **Q: Is this removable and suitable for a historic house?** A: I find this product to be inserted and held in place by "pinch" tension and can easily be removed. **Q: is this fine for sealing gaps around an air conditioner?** A: I believe it would as long as the gaps around the ac are withing the tolerances of the backer rod. The backer rod diameter should be no less than 1/4" greater than the gap to be filled. Maximum gap of 3/4" for 1" backer rod. I am doing a diy cabin build and used different diameter backer rods based on gaps around windows and doors. Works great for me. **Q: Can this go between the house and patio?** A: if your using to keep out water you should caulk over to seal it better. its also good for air leaks too like window a/c units. ## Frequently Bought Together - Caulk Saver Foam Backer Rod for Gaps and Joints Backing Rod Concrete Filler Rope, Gray (1/2 Inch x 30 Ft) - Sikaflex Crack Flex Sealant, Gray, High performance, textured polyurethane sealant, self-leveling, sealant for sealing horizontal cracks, 10,1 fl. Oz - Backer Rod 1/4 Inch, EPDM Rubber Foam Caulk Saver 50' Grey Weather Strip Seal for Concrete Joints, Wall Cracks, Driveway and Joint Fillers. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/421102842-tondiamo-caulk-saver-foam-backer-rod-gap-filler-concrete-rope](https://www.desertcart.hr/products/421102842-tondiamo-caulk-saver-foam-backer-rod-gap-filler-concrete-rope) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-09-18*