Safe to touh an aluminum boat trailer or stainless boat prop?

It's safe on aluminum outboard powerheads so I'm sure it's safe on a aluminum trailer and it won't harm the stainless prop at all

Can it be used in indoor plumbing

Well depends on problem , drain clog no won’t work . But if you have a plumbing coil that has mineral scale from hard water yes it will work . Also any water system closed loop style will clean internal deposits like a heating coil on boilers . Good luck

Is this safe for plastic and the pads of an evaporative cool?

This product is safe on plastic. For an industrial application, we would recommend using our Industrial Descaler, RYDLYME. https://www.apexengineeringproducts.com/product/rydlyme-biodegradable-descaler/

I used it to flush a hot water heater. Two weeks later the hot water smells while the cold water doesn't. How long does the smell / odor last?

Usually a smell from a water heater means the anode rod, has gone bad. You can flush it many times. It will only come back…. Change the rod.

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RYDLYME Marine Biodegradable Descaler (1, Gallon Bottle)

RYDLYME Marine Biodegradable Descaler (1, Gallon Bottle)

Product ID: 70268466

Details

Brand
RYDLYME
Item Form
Liquid
Material Feature
Biodegradable
Scent
Lemon
Specific Uses For Product
Boat Engine

⚡Rapid 2-4 hour circulation

🌿100% biodegradable & non-toxic

🛠️Safe on most metals except zinc/magnesium

1509 kr

Duties & taxes included

In stock

Sold byAmazon DenmarkDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Clean smarter, not harder — the marine descaler pros trust!

TRUSTED PROVEN - Highly rated (#76 in Boat Cleaners) with 4.7 stars from 339 users
ECO FRIENDLY FORMULA - Concentrated, biodegradable, and non-corrosive for guilt-free maintenance
CUSTOMIZABLE DILUTION - Dilute 1:1 for heavy scale or 1:3 for routine upkeep—flexible to your needs
VERSATILE APPLICATION - Perfect for cooling systems, heat exchangers, condensers & more
FAST ACTING MARINE DESCALER - Dissolves calcium, lime, rust, barnacles & mussels in just hours

RYDLYME Marine Biodegradable Descaler is a concentrated, eco-friendly liquid solution designed to rapidly dissolve tough marine scale buildup like calcium, lime, rust, barnacles, and mussels. Safe for most metals (except zinc and magnesium), it’s ideal for cooling systems, heat exchangers, and condensers. Dilutable for both heavy-duty cleaning and routine maintenance, it circulates quickly—2 hours for small units, 4 hours for large—making it a top-rated choice for professional-grade marine engine care.

Specifications

ASIN	B07BYYYQLY
ASIN	B07BYYYQLY
Best Sellers Rank	#28,752 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #76 in Boat Cleaners
Brand Name	RYDLYME
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (339)
Date First Available	May 7, 2018
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
Package Dimensions	13 x 13 x 13 inches; 38 pounds
Part Number	RYM01
Recommended Uses For Product	AC Units, Condensers, Coolers, Marine Engine Cooling Systems, Heat Exchangers, Seawater systems, Tube Bundles
Scent	Lemon
Size	128 Ounce (Pack of 1)
Special Features	Concentrated
Specific Uses For Product	Boat Engine Flush
Surface Recommendation	Engines
UPC	635238000227
Unit Count	128 Ounce

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