--- product_id: 14306321 title: "Standard Deep Penetrating Concrete Sealer (2.5-Gallon) – Basement & Interior/Exterior Concrete Sealer for Water Vapor Resistance, Helps Reduce Moisture Penetration and Seepage" brand: "radonseal" price: "€ 486.38" currency: EUR in_stock: true reviews_count: 8 category: "Radon Seal" url: https://www.desertcart.gr/products/14306321-standard-deep-penetrating-concrete-sealer-2-5-gallon-basement-interior store_origin: GR region: Greece --- # Blocks water seepage permanently Seals against radon gas migration Chemically hardens & strengthens concrete Standard Deep Penetrating Concrete Sealer (2.5-Gallon) – Basement & Interior/Exterior Concrete Sealer for Water Vapor Resistance, Helps Reduce Moisture Penetration and Seepage **Brand:** radonseal **Price:** € 486.38 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal smart, live safe—your basement’s ultimate shield! ## Quick Answers - **What is this?** Standard Deep Penetrating Concrete Sealer (2.5-Gallon) – Basement & Interior/Exterior Concrete Sealer for Water Vapor Resistance, Helps Reduce Moisture Penetration and Seepage by radonseal - **How much does it cost?** € 486.38 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/14306321-standard-deep-penetrating-concrete-sealer-2-5-gallon-basement-interior) ## Best For - radonseal enthusiasts ## Why This Product - Trusted radonseal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Concrete Armor:** Built-in densifier chemically fortifies concrete against damage - • **Forever Sealed:** Permanent protection—no reapplication ever needed - • **Eco-Smart Formula:** Zero VOCs, non-toxic, and safe for indoor/outdoor use - • **Dual-Action Defense:** Waterproofs and mitigates radon in one powerful application - • **Finish-Ready Surface:** Paintable and compatible with all coatings for flawless finishing ## Overview RadonSeal Standard is a 2.5-gallon deep penetrating concrete sealer designed for basement waterproofing and radon mitigation. It permanently blocks water vapor, seepage, and radon gas by chemically sealing concrete pores and capillaries. Featuring a built-in densifier, it strengthens concrete against environmental damage and dusting. The eco-friendly, zero-VOC formula is easy to apply, safe indoors and outdoors, and compatible with all paints and coatings, making it ideal for new poured concrete floors and walls. Trusted since 1997 with a money-back guarantee. ## Description RadonSeal Standard – Deep Penetrating Concrete Sealer (2.5-gal) Basement Waterproofing & Radon Mitigation Sealer; Seals Against Water Vapor, Water Seepage, & Radon Gas Permanently - desertcart.com Review: Waterproof basement floor - Used to keep groundwater from seeping up through basement floor before we put down new workout foam flooring. Bought a new 2 1/2 gallon sprayer and bristle bush to apply, and everything went well, applied easy and quick. So far no water. Review: Good product - Work well would purchase again ## Features - BASEMENT WATERPROOFING & RADON MITIGATION IN ONE - Internally Seals the Matrix Of Concrete, Blocking The Pores And Capillaries To Prevent Water Seepage, Water Vapor, Efflorescence, & Radon Gas Migration Through Concrete. Ideal For Basement Floors, Interior Basement Walls, Foundation Walls, Slab-On-Grade, Indoor & Outdoor Poured Concrete Slabs, And Walls. - BUILT-IN CONCRETE DENSIFIER - Chemically Hardens & Strengthens Concrete To Protect And Reduce Concrete Dusting, Crazing, Damage Caused By Salts, De-Icing Chemicals, And Freeze Thaw Cycles. - PERMANENT RESULTS – No Reapplication Needed, Ever! RadonSeal Reacts Chemically Deep Inside The Pores To Become A Part Of The Concrete Itself. Resistant To Hydrostatic Water Pressure, RadonSeal Will Never, Peel, Crack, Or Fade Away. - ECO-FRIENDLY & EASY TO APPLY FORMULA – Zero VOCs, No fumes or Noxious Odors, No Solvents, Non-Toxic, Non-Flammable. Water-based. Safe For Use Indoors or Outdoors. - PAINTABLE & COMPATIBLE WITH ALL COATINGS AND OVERLAYS – Serves As An Excellent Primer For Paints, Epoxies, Stains, And Other Decorative Coatings. Seal Your Basement Walls & Floors Before Finishing Your Basement. Protect Flooring From Warping & Water Damage. - RadonSeal STANDARD Is For Use On Newer POURED CONCRETE Slabs, Foundation Walls & Retaining Walls. Use RadonSeal PLUS For Older Concrete, Concrete Blocks, and Any Concrete With A History Of Seepage. - Made In The USA. Money-Back Guarantee - Trusted Concrete Sealer Since 1997 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00ITZJMRK | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #243,508 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #543 in Hardware Sealers | | Brand | RadonSeal | | Color | Clear | | Customer Reviews | 3.9 3.9 out of 5 stars (32) | | Date First Available | March 7, 2012 | | Included Components | Concrete Sealer | | Installation Method | Apply using a hand-pump "garden or bug" sprayer | | Is Discontinued By Manufacturer | No | | Item Form | Liquid | | Item Package Quantity | 1 | | Item Weight | 24 pounds | | Item dimensions L x W x H | 11 x 24 x 11 inches | | Item model number | 102 | | Manufacturer | Novion | | Material | Blended Silicate | | Number of Items | 1 | | Part Number | 111 | | Product Dimensions | 11 x 24 x 11 inches | | Size | 2.5-gallon | | Style | Penetrating Concrete Sealer | | Surface Recommendation | Concrete Walls & Floors | | UPC | 856255006010 | | Unit Count | 320.0 Fluid Ounces | | Usage | Poured Concrete | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** RadonSeal - **Item Weight:** 24 Pounds - **Item dimensions L x W x H:** 11 x 24 x 11 inches - **Material:** Blended Silicate - **Style:** Penetrating Concrete Sealer ## Images ![Standard Deep Penetrating Concrete Sealer (2.5-Gallon) – Basement & Interior/Exterior Concrete Sealer for Water Vapor Resistance, Helps Reduce Moisture Penetration and Seepage - Image 1](https://m.media-amazon.com/images/I/71pSNziKdfL.jpg) ## Questions & Answers **Q: Can you please tell me can i paint over it, drylock? basement has lots of efflorescence, etc. if i patch and clean first will radonseal work? thx** A: Provided RadonSeal® is applied accordingly and has absorbed completely into the concrete you can apply paint, water-based stains, concrete dyes, surface levelers and similar over it. RadonSeal® will likely not work over the patching compounds (due to adhesion additives). **Q: Can this be used on painted stucco?** A: Thank you for your question. RadonSeal should be used on bare and porous concrete surfaces only. RadonSeal is not a topical sealer that chemically bonds and coats the surface. RadonSeal is a nano-chemical, penetrating sealer, that works by being absorbed through bare and porous concrete surfaces and sealing concrete internally (below the surface). Kind Regards, --------------- Craig - Product Expert RadonSeal **Q: Can i tile over a basement floor treated with RadonSeal?** A: Provided the sealer is applied accordingly, you can install tiles 7-10 days after the application. Did you know that there are many concrete finishing techniques? If you are applying the sealer to a tight or dense concrete surface cap, acid etching, mechanical abrasion, or grinding may be required. **Q: Can this be used on clay brick basement walls?** A: No. Use LastiSeal® Brick & Masonry Sealer instead. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Waterproof basement floor *by A***Y on December 13, 2025* Used to keep groundwater from seeping up through basement floor before we put down new workout foam flooring. Bought a new 2 1/2 gallon sprayer and bristle bush to apply, and everything went well, applied easy and quick. So far no water. ### ⭐⭐⭐⭐⭐ Good product *by P***A on September 1, 2025* Work well would purchase again ### ⭐ This product did not work at all. *by A***S on March 16, 2020* I recently had my indoor atrium floor cemented in with a colored and textured concrete. The contractor also applied a concrete sealant to the floor after it dried. The reason that I had the concrete poured was because the radon level in the room was 6.0. After the concrete was put in the radon level went down to 3.9, better but not as low as I was hoping for. The concrete also had many small cracks that showed when the floor got wet. To improve the radon level I purchased this product and followed the directions very closely to seal the small cracks in the concrete. The three step process is very labor intensive and time consuming. The next day the concrete was covered with a dry, flaky layer that looked terrible. I had to scrape off the layer and rewet the floor and rinse it then let it dry. The white powdered residue was imbedded in the concrete texture and very hard to get out. After letting it dry the floor only looked slightly better. I went through this process three more times with little improvement each time. I finally ended up with a permanent white stain on my colored concrete and worst of all, the small cracks are not sealed any more that they were before I did all of this work. My radon level has not been improved and my efforts to get a response from the manufacturer have not been answered. Please save yourself the $100 and a lot of work for nothing and do not buy this product. ## Frequently Bought Together - RadonSeal Standard – Deep Penetrating Concrete Sealer (2.5-gal) Basement Waterproofing & Radon Mitigation Sealer; Seals Against Water Vapor, Water Seepage, & Radon Gas Permanently - Chapin 20000 Made in USA 1 -Gallon Lawn and Garden Pump Pressured Sprayer, for Spraying Plants, Garden Watering, Weeds and Pests, Polypropylene, Translucent White - RadonSeal Standard Deep-Penetrating Concrete Sealer - Basement Waterproofing & Radon Mitigation - 5 Gals --- ## 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.gr/products/14306321-standard-deep-penetrating-concrete-sealer-2-5-gallon-basement-interior](https://www.desertcart.gr/products/14306321-standard-deep-penetrating-concrete-sealer-2-5-gallon-basement-interior) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-04-23*