--- product_id: 275878443 title: "Rislone 4447 Compression Repair with Ring Seal - 16.9 oz." brand: "bar's leaks" price: "€ 21.65" currency: EUR in_stock: true reviews_count: 10 category: "Bar's Leaks" url: https://www.desertcart.be/products/275878443-rislone-4447-compression-repair-with-ring-seal-16-9-oz store_origin: BE region: Belgium --- # Repairs engine blow-by Restores lost compression Viscosity improver for smoother performance Rislone 4447 Compression Repair with Ring Seal - 16.9 oz. **Brand:** bar's leaks **Price:** € 21.65 **Availability:** ✅ In Stock ## Summary > ⚡️ Unlock hidden engine power and silence the knock—because your ride deserves the best! ## Quick Answers - **What is this?** Rislone 4447 Compression Repair with Ring Seal - 16.9 oz. by bar's leaks - **How much does it cost?** € 21.65 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/275878443-rislone-4447-compression-repair-with-ring-seal-16-9-oz) ## Best For - bar's leaks enthusiasts ## Why This Product - Trusted bar's leaks brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smooth Operator:** Frees sticky piston rings, reducing friction and engine noise for a silky ride. - • **Universal Engine Ally:** Compatible with gasoline and diesel engines, from cars to heavy equipment. - • **Eco-Smart Performance Boost:** Helps pass emissions tests without harmful metals—good for your engine and the planet. - • **Seal the Deal on Engine Wear:** Fills scratches and grooves in cylinder walls to eliminate blow-by and compression loss. - • **Revive Your Engine's Heartbeat:** Restores and stabilizes compression for renewed power and efficiency. ## Overview Bar's Leaks Rislone 4447 Compression Repair with Ring Seal is a premium additive designed to restore lost compression in high-mileage gasoline and diesel engines. Its proprietary polymer blend fills cylinder wall imperfections and frees sticky piston rings, reducing blow-by, engine noise, and wear. This 16.9 oz formula improves viscosity for smoother operation, helps vehicles pass emissions tests, and is free from harmful metals, making it a safe, effective solution for extending engine life across a wide range of vehicles. ## Description Rislone High Mileage Compression Repair with Ring Seal is a concentrated proprietary blend of high-shear and premium polymers developed for higher mileage engines that are suffering from decreased or uneven compression. Low compression can be caused by normal engine wear and decreased sealing between the piston rings and cylinder walls. The non-dispersant olefin copolymers fill scratches & grooves in cylinder walls to increase and stabilize compression in all cylinders. Compression Repair renews worn engines, rebuilds compression, restores lost power and repairs engine blow-by. In addition, Compression Repair helps vehicles pass emission tests. Some signs of decreased compression include loss of power, poor fuel mileage, oil consumption, blue smoke from exhaust, plug fouling and engine noise or vibration. The Viscosity Improver (VI) is designed specifically to provide an optimum balance of shear stability and thickening efficiency required in old and modern engines. This performance additive meets the most severe passenger car and truck engine requirements. Product works by freeing sticky rings and filling gaps & scratches in cylinder walls, eliminating blow-by and compression loss while also reducing friction and wear. Blow-by is usually caused by gaps in internal engine parts resulting from excess wear. Rislone Compression Repair with Ring Seal does not contain any harmful lead or other metals that could damage the inside of your engine or be burned and contaminate emissions components and the environment. Works on gasoline and diesel engines with conventional, high mileage and synthetic engine oils. Review: Works like magic - It’s amaizing. Just let the engine run for 5 minutes and the knock sound was gone Review: Worked well - Worked well, old engine is smoother now. ## Features - Restores lost compression - Repairs blow-by - Frees sticky rings - Viscosity improver - Use on any gasoline or diesel engine ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00CGRX6RE | | ASIN | B00CGRX6RE | | Best Sellers Rank | #13,075 in Automotive ( See Top 100 in Automotive ) #68 in Automotive Fillers, Adhesives & Sealants | | Brand Name | Bar's Leaks | | Compatible with Vehicle Type | Car, Truck, Motorcycle, ATV, Bus, Boat, Snowmobile, Lawn Mower, Generator, Tractor, RV, Heavy Equipment | | Container Type | Bottle | | Customer Reviews | 4.3 4.3 out of 5 stars (1,830) | | Customer reviews | 4.3 4.3 out of 5 stars (1,830) | | Date First Available | 27 October 2013 | | Department | unisex-adult | | Global Trade Identification Number | 00078615044474 | | Is Discontinued By Manufacturer | No | | Item Weight | 0.35 Pounds | | Item model number | 4447 | | Liquid Volume | 16.5 Fluid Ounces | | Manufacturer | Bar's Products | | Manufacturer | Bar's Products | | Manufacturer Part Number | 4447 | | Product Dimensions | 6.6 x 6.6 x 18.8 cm; 158.76 g | | UPC | 078615044474 078615444472 | | Unit Count | 487.9632 Milliliters | | Viscosity | 5W-30 sae_grade | ## Product Details - **Brand:** Bar's Leaks - **Liquid volume:** 16.5 Fluid Ounces - **Package information:** Bottle - **Viscosity:** 5W-30 sae_grade ## Images ![Rislone 4447 Compression Repair with Ring Seal - 16.9 oz. - Image 1](https://m.media-amazon.com/images/I/61we3oHoC9L.jpg) ## Questions & Answers **Q: Can you use this product and the anti-friction product at the same time?** A: Hello, and thank you for your question. We appreciate you considering Rislone for your automotive needs. Since you don't specify which anti-friction product you are asking about, it's difficult for us to give you a complete answer. What we can say is this: Rislone High Mileage Compression Repair (part number 4447) IS compatible with Rislone Nano Prime Engine & Oil Additive (part number 4104), which uses Nano Tungsten and Moly to reduce friction up to 38%. We have not tested the Compression Repair with products from other manufacturers, so we are not able to address possible compatibility concerns in that area. We hope this satisfactorily answers your question. If you have any other questions or would like additional information on these or any of our products, please feel free to call our Tech Support Team at 1-800-345-6572. We are here to assist you Monday through Friday, from 8 am to 5 pm Eastern time. **Q: Can i use (mix) this product if i am using xl nanolube engine oil additive & nano treatment; reduces oil burning & engine smoke** A: Thank you for your question and for considering Rislone Compression Repair with Ring Seal (part number 4447) to help with your automotive needs. We cannot recommend these two products be mixed as we only have test data on compatibility within our own family of products. Since we don't test the efficacy or compatibility of our products alongside a competitors product, we can't advise you to use them together. We certainly appreciate your interest, but as a family run company for over 70 years, we pride ourselves on being honest with our customers - if we don't think we can help you, we will let you know, and in this case, we can't. If you have any other questions or we may provide additional information, please feel free to contact our Tech Support team at 1-800-345-6572. We are here to assist you Monday through Friday, from 8 am to 5 pm Eastern time. **Q: Do i put in every oil chang or is it a 1 time and done** A: Every oil change. I have an 87 Toyota Corolla with 200k, it takes 3 at this point. I have observed that it works after the first trip. It has eliminated blue smoke and low oil pressure. "Your mileage may vary". **Q: Is it safe to use in engines with variable valve timing? Like a 1997 Honda Prelude** A: Thank you for your question, and for considering Rislone to help with your Honda. When installed following instructions, Rislone Compression Repair with Ring Seal (part number 4447) is safe to use in your Prelude. It can be used in all 4, 5, 6, 8, and 10 cylinder gasoline or diesel engines, and can be used with conventional, high mileage, and synthetic engine oils. Do not overfill. If you have any other questions, or would like any additional information, please feel free to call our Tech Support team at 1-800-345-6572. We are here to assist you Monday through Friday, from 8 am to 5 pm, Eastern time. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works like magic *by L***E on 29 December 2023* It’s amaizing. Just let the engine run for 5 minutes and the knock sound was gone ### ⭐⭐⭐⭐⭐ Worked well *by A***9 on 26 December 2023* Worked well, old engine is smoother now. ### ⭐⭐⭐⭐ happy *by B***4 on 17 June 2025* as described..recommended ## Frequently Bought Together - Rislone High Mileage 4 6 8 Compression Repair, 16.9 oz. - Bar's Leaks 1000 High Mileage Engine Repair, 16.9 oz | Restores Performance, Increases Compression & Horsepower, Stops Leaks, Noise & Smoking - Bar's Leaks OS-1 Oil Seal Engine Oil Burning and Leak Repair, 16.9 oz. --- ## 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.be/products/275878443-rislone-4447-compression-repair-with-ring-seal-16-9-oz](https://www.desertcart.be/products/275878443-rislone-4447-compression-repair-with-ring-seal-16-9-oz) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-04-23*