--- product_id: 242154321 title: "Flex Seal Flex Black Paste 1lb Jar with Allway Tools Putty 3-Pack Knives Bundle (2 Items)" brand: "flex seal" price: "270 zł" currency: PLN in_stock: true reviews_count: 8 category: "Flex Seal" url: https://www.desertcart.pl/products/242154321-flex-seal-flex-black-paste-1lb-jar-with-allway-tools store_origin: PL region: Poland --- # customizable smooth or textured finish 100% waterproof sealant 1lb high-strength rubber paste Flex Seal Flex Black Paste 1lb Jar with Allway Tools Putty 3-Pack Knives Bundle (2 Items) **Brand:** flex seal **Price:** 270 zł **Availability:** ✅ In Stock ## Summary > 🖤 Seal it, save it, style it—Flex Black Paste gets the job done with flair! ## Quick Answers - **What is this?** Flex Seal Flex Black Paste 1lb Jar with Allway Tools Putty 3-Pack Knives Bundle (2 Items) by flex seal - **How much does it cost?** 270 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/242154321-flex-seal-flex-black-paste-1lb-jar-with-allway-tools) ## Best For - flex seal enthusiasts ## Why This Product - Trusted flex seal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Leak Repair:** Spread on cracks in minutes—no costly pros needed - • **Creative Finishing Touch:** Smooth or etch for unique textures—functional art in repair - • **Durable Weatherproof Seal:** Withstands rain, expansion & contraction for lasting protection - • **Pro-Grade Putty Knife Bundle:** Includes 3 precision tools for flawless application every time - • **Versatile Surface Compatibility:** Bonds seamlessly with metal, wood, glass, PVC & more ## Overview Flex Seal Flex Black Paste is a 1lb jar of premium rubberized paste designed for quick, durable waterproof repairs on a variety of surfaces including metal, wood, glass, and PVC. Its unique formula creates a flexible, weather-resistant seal that prevents leaks and withstands seasonal expansion and contraction. The included 3-pack of professional putty knives ensures smooth, customizable application—perfect for both functional fixes and artistic textures. Trusted by DIYers to save time and money on home and vehicle repairs. ## Description Using putty knife, trowel or similar tool, remove an even layer from the top surface. Do not scoop deeply into the tub as this may create air pockets. Apply a generous amount to the surface using a smooth motion. Etching the surface will increase adhesion. Sanding is not recommended, instead smooth to desired finish or add designs to create unique artistic textures. Review: Fixed Leak in Poured Basement Foundation - So I had 2 cracks running down my poured basement wall that would leak every time it rained. I was quoted $1000 to have someone come out and fix the leaks. SO, I went to the internet to see how to patch the leaks. You had to take a hammer drill and put holes 1 foot apart along the crack, paste these plastic tubes over each hole, put a paste over the crack that does NOT fill it in. Then inject a compound into the tubes that is supposed to fill in the cracks forever and survive the change in the seasons with the expansion and contraction. The kit would have cost me $250. So, I bought this, spent 10 minutes spreading it over the crack, I have had NO leaks for the last 3 months. Michigan has had more rain this summer than any I can imagine and my basement has been completely dry ever since. I have NOT gone through a winter yet so I do not know if that will affect the seal. I will try to post next summer to let everyone know if it held. SAVED A TON OF MONEY! EASY FIX! Picture doesn't show much, just wanted my review to get attention because I cannot believe how much it would have cost me to have professionals come out and do it. If you don't believe me, look up the process for sealing cracked basement walls. Update...it is now just over 2 years later...still no leaks. Works great. Review: Great stuff! - Our lawnmower is only a year old and somehow ended up with a couple of holes in the gas tank area when we uncovered it this spring. We used this paste and repaired the tank and the mower works perfectly fine again. You do need to make sure you reseal the container properly or the product will all completely dry out. The only disappointment was that it was not sealed the best from the manufacturer originally and most of the outer edge of the paste is unusable because it arrived dried out. We could only use the middle of the container upon opening a brand new product. ## Features - Using putty knife, trowel or similar tool, remove an even layer from the top surface - Do not scoop deeply into the tub as this may create air pockets - Apply a generous amount to the surface using a smooth motion - Etching the surface will increase adhesion - Sanding is not recommended, instead smooth to desired finish or add designs to create unique artistic textures ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08ML9943C | | Best Sellers Rank | #303,367 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #282 in Putty Knives | | Brand Name | Flex Seal | | Color | Black | | Compatible Material | Aluminum, Ceramic, Glass, Metal, Polyvinyl Chloride, Wood | | Customer Reviews | 3.9 3.9 out of 5 stars (892) | | Item Dimensions | 8 x 6.1 x 4.7 inches | | Item Form | Paste | | Item Weight | 1.1 Pounds | | Manufacturer | Flex Seal | | Material Type | Rubber | | Part Number | PFSBLKR16 | | Unit Count | 16 Ounce | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Flex Seal - **Item Weight:** 1.1 Pounds - **Item dimensions L x W x H:** 8 x 6.1 x 4.7 inches - **Material:** Rubber - **Water Resistance Level:** Waterproof ## Images ![Flex Seal Flex Black Paste 1lb Jar with Allway Tools Putty 3-Pack Knives Bundle (2 Items) - Image 1](https://m.media-amazon.com/images/I/71EwmVRuHcL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fixed Leak in Poured Basement Foundation *by M***E on September 24, 2021* So I had 2 cracks running down my poured basement wall that would leak every time it rained. I was quoted $1000 to have someone come out and fix the leaks. SO, I went to the internet to see how to patch the leaks. You had to take a hammer drill and put holes 1 foot apart along the crack, paste these plastic tubes over each hole, put a paste over the crack that does NOT fill it in. Then inject a compound into the tubes that is supposed to fill in the cracks forever and survive the change in the seasons with the expansion and contraction. The kit would have cost me $250. So, I bought this, spent 10 minutes spreading it over the crack, I have had NO leaks for the last 3 months. Michigan has had more rain this summer than any I can imagine and my basement has been completely dry ever since. I have NOT gone through a winter yet so I do not know if that will affect the seal. I will try to post next summer to let everyone know if it held. SAVED A TON OF MONEY! EASY FIX! Picture doesn't show much, just wanted my review to get attention because I cannot believe how much it would have cost me to have professionals come out and do it. If you don't believe me, look up the process for sealing cracked basement walls. Update...it is now just over 2 years later...still no leaks. Works great. ### ⭐⭐⭐⭐ Great stuff! *by A***S on May 15, 2023* Our lawnmower is only a year old and somehow ended up with a couple of holes in the gas tank area when we uncovered it this spring. We used this paste and repaired the tank and the mower works perfectly fine again. You do need to make sure you reseal the container properly or the product will all completely dry out. The only disappointment was that it was not sealed the best from the manufacturer originally and most of the outer edge of the paste is unusable because it arrived dried out. We could only use the middle of the container upon opening a brand new product. ### ⭐⭐⭐⭐⭐ It fixed my leaking tank. *by B***. on January 19, 2021* I had a leak in a tank on my humidifier. It is no longer manufactured so it could not be replaced. I tried another brand of glue but the leak was on a bend at the corner that was also tapered down at 45 degrees. The glue would not stay in place. I tried gorilla tape which I am sure would have worked but I could not get it to lie flat due to the bend and the angle. Then I ordered the flex paste. It was thick enough to stay in place on it's own. I was able to press it down into the small hole and spread some extra around the leak site for support. I then let it cure for 48 hours and success the tank is as good as new. However, the repair is not very pretty due to all the ribs on the tank and I was afraid to do too much cleanup because I did not want to damage my repair. So overall I am pleased. 1 It was easy to spread. 2 It was not the easiest to use in my case because it was messy. 3 It was waterproof and fixed my tank and that is all I really wanted. So overall I am very satisfied. --- ## 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.pl/products/242154321-flex-seal-flex-black-paste-1lb-jar-with-allway-tools](https://www.desertcart.pl/products/242154321-flex-seal-flex-black-paste-1lb-jar-with-allway-tools) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-12*