--- product_id: 63143932 title: "Marine Biodegradable Descaler (4, Gallon Bottle)" brand: "rydlyme" price: "€ 496.53" currency: EUR in_stock: true category: "Rydlyme" url: https://www.desertcart.pt/products/63143932-marine-biodegradable-descaler-4-gallon-bottle store_origin: PT region: Portugal --- # Fast 2-4 hour circulation 100% biodegradable & non-toxic Dissolves 2 lb calcium scale/gal Marine Biodegradable Descaler (4, Gallon Bottle) **Brand:** rydlyme **Price:** € 496.53 **Availability:** ✅ In Stock ## Summary > ♻️⚓ Clean smarter, sail stronger—marine descaling redefined! ## Quick Answers - **What is this?** Marine Biodegradable Descaler (4, Gallon Bottle) by rydlyme - **How much does it cost?** € 496.53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/63143932-marine-biodegradable-descaler-4-gallon-bottle) ## Best For - rydlyme enthusiasts ## Why This Product - Trusted rydlyme brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Eco-Friendly Formula:** Concentrated, biodegradable, and non-corrosive—clean your vessel without compromising the environment. - • **Customizable Strength:** Dilute 1:1 for severe buildup or 1:3 for routine maintenance—precision cleaning tailored to your vessel’s demands. - • **Versatile Marine Savior:** Perfect for cooling systems, heat exchangers, condensers, and more—one solution for all your water-side cleaning needs. - • **Quick & Easy Application:** Circulate for just 2-4 hours at ambient temperature—no heating required, minimal downtime guaranteed. - • **Powerful Scale Annihilator:** Effortlessly dissolves calcium, lime, rust, barnacles & mussels to restore peak marine system efficiency. ## Overview RYDLYME Marine Biodegradable Descaler is a concentrated, eco-friendly liquid solution designed to rapidly dissolve tough marine scale deposits like calcium, lime, rust, barnacles, and mussels. Ideal for a wide range of vessel water-side systems including cooling units, heat exchangers, and condensers, it offers customizable dilution ratios and fast 2-4 hour circulation cleaning without heating. Compatible with most marine materials and safe for the environment, this 4-gallon pack delivers professional-grade performance for maintaining peak marine equipment efficiency. ## Description RYDLYME Marine RYM04 is a 4 x 1 gallon case of biodegradable marine descaler for water-side cleaning in vessel systems. Use it to dissolve calcium, lime, rust, barnacles, mussels, zebra mussels, tiger shells, waterscale, and mineral deposits that restrict flow and heat transfer. Applications include engine cooling systems, keel coolers, lube oil and transmission coolers, heat exchangers, condensers, chillers, boilers, evaporators, seacocks, sea water systems, AC units, tube bundles, water pumps, impellers, desalination units, and fire mains. Dilution and use: choose concentration by buildup severity. Typical working range is 25-50% product-to-water; use 1:1 for severe scale and up to 1:3 for periodic maintenance. Circulate 2-4 hours for most applications, then rinse with fresh water before returning equipment to service. Performance reference: RYDLYME Marine dissolves approximately 2 lb / 1 kg of calcium carbonate scale per gallon of concentrate. This case provides four 1-gallon bottles for multiple small cleanings or one larger service job. Handling notes: use at ambient temperature; no heating is required. Operating range is 0°F to 180°F. Use with water only. Do not mix with bleach, sodium hypochlorite, strong oxidizers, or caustics. Material guidance: compatible with many common marine materials when used as directed, including brass, copper, steel, fiberglass, gelcoat, plastics, glass, rubber, titanium, ceramic, and painted surfaces. Spot test unknown materials; avoid full-strength contact with zincs, anodes, magnesium, polished chrome, or sensitive alloys. Safety and disposal: follow the label and SDS, wear eye protection and gloves, keep containers closed, and keep out of reach of children. Dispose of used solution according to local rules. This offer is for one 4 x 1 gallon case unless stated otherwise. Pump, bucket, hoses, fittings, clamps, tools, and kit accessories are not included. ## Features - DISSOLVES CALCIUM, LIME, RUST, BARNACLES AND MUSSELS QUICKLY AND EFFECTIVELY! - CONCENTRATED, BIODEGRADABLE, NON-TOXIC, AND NON-CORROSIVE DESCALER! - APPLICATIONS INCLUDE: COOLING SYSTEMS, HEAT EXCHANGERS, CONDENSERS AND MORE! - DILUTE 1:1 WITH WATER FOR SEVERE SCALE AND 1:3 FOR PERIODIC MAINTENANCE! - CIRCULATE JUST 2 HOURS FOR SMALL UNITS, 4 HOURS FOR LARGE UNITS! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07CPKVY3T | | ASIN | B07CPKVY3T | | Best Sellers Rank | #20,357 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #62 in Boat Cleaners | | Brand Name | RYDLYME | | Contains Liquid Contents? | Yes | | Customer Reviews | 4.6 4.6 out of 5 stars (335) | | Date First Available | May 7, 2018 | | Is Discontinued By Manufacturer | No | | Item Form | Liquid | | Item Volume | 4 Gallons | | Item Weight | 38 Pounds | | Item model number | RYM04 | | Manufacturer | Apex Engineering Products Corporation | | Manufacturer | Apex Engineering Products Corporation | | Material Feature | Biodegradable Warning | | Material Features | Biodegradable | | Model Number | RYM04 | | Number of Items | 1 | | Part Number | RYM04 | | Product Dimensions | 13 x 13 x 13 inches; 38 Pounds | | Recommended Uses For Product | Boat Engine Flush, Condensers, Cooling Systems, Heat Exchangers, Marine Water-Side Descaling | | Scent | Almond | | Size | 215 Ounce (Pack of 1) | | Special Features | Concentrated | | Specific Uses For Product | Boat Engine Flush | | Surface Recommendation | Engines | | UPC | 635238000234 | | Unit Count | 215.0 Ounce | ## Product Details - **Brand:** RYDLYME - **Item Form:** Liquid - **Material Feature:** Biodegradable - **Scent:** Almond - **Specific Uses For Product:** Boat Engine Flush ## Images ![Marine Biodegradable Descaler (4, Gallon Bottle) - Image 1](https://m.media-amazon.com/images/I/71D6Wkd+r9L.jpg) ## Available Options This product comes in different **Set** options. ## Questions & Answers **Q: I used a 3gpm water transfer pump that ran fine for about 10 minutes but then lost it's prime & started smoking. What have you used successfully?** A: I used an inexpensive 1100 GPH submersible Bilge Pump (Brand was Maxzone) hooked up to a 12 volt battery. Ran it for 4 hrs. +, worked great, and pump still works like new! **Q: can you dilute this and pour directly into thermostat housing of a Yamaha 150 OB? I can't take my boat out of the water** A: Yes, manufacturer recommends 1:1 dilution with clean water. Static cleaning may require additional time for cleaning, typically 1-2 hours, may require 3 hours at most. **Q: can you dilute this to 1-1 and pour directly into thermostat housing? I can't take my boat out of the water** A: Yes. You didn’t say what type of motors you have? I made a setup to do a close loop system. Remove your thermostats and reinstall housing. Connect a hose or tubing to thermostat housing and run it to a bucket with a small 1/4 hp water sump pump in a bucket or a 30 gallon trash can is what I used with cleaner solution and then connect a hose to the out flow and run that to the bucket so you can get a full circulation through your cooling system. This set up is I used when I can’t run the motors. Don’t by the pump kit they sell. It’s junk. The pump is way to inefficient. The cleaner works really well . Only takes about 30 minutes. You can run longer time but You will be amazed how much crap comes out in a short time. You will need to completely flush the cooling system with clean water after you are done. Install new thermostats. Thermostats are cheap. Don’t try and just clean the old ones. If you have outboards and can take boat out of the water that’s the easiest way. I have a tank that I can lower my motors in and pour the cleaner solution in the tanks but I still remove the thermostats and reinstall the thermostat housings and run the motors for about 5-10 minutes. I do this every 50 hours or so. I run my boat in saltwater. You need to watch your temperature gauges constantly so you don’t over heat the motors. The water in the tanks will get hot. ## Frequently Bought Together - RYDLYME Marine Biodegradable Descaler (4, Gallon Bottle) - RYDLYME Marine Biodegradable Descaler - 1 Gallon - Superior Pump 91250 1800GPH Thermoplastic Submersible Utility Pump with 10-Foot Cord, 1/4 HP --- ## 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.pt/products/63143932-marine-biodegradable-descaler-4-gallon-bottle](https://www.desertcart.pt/products/63143932-marine-biodegradable-descaler-4-gallon-bottle) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-07-11*