---
product_id: 56843548
title: "Silver King HF5SK471 1 Quart Hydronic Formula #5 Hot Water Systems Boiler Cleaner Inhibitor With Silicone SK-471"
brand: "silver king"
price: "฿4406"
currency: THB
in_stock: true
reviews_count: 4
url: https://www.desertcart.co.th/products/56843548-silver-king-hf5sk471-1-quart-hydronic-formula-5-hot-water
store_origin: TH
region: Thailand
---

# Silver King HF5SK471 1 Quart Hydronic Formula #5 Hot Water Systems Boiler Cleaner Inhibitor With Silicone SK-471

**Brand:** silver king
**Price:** ฿4406
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Silver King HF5SK471 1 Quart Hydronic Formula #5 Hot Water Systems Boiler Cleaner Inhibitor With Silicone SK-471 by silver king
- **How much does it cost?** ฿4406 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/56843548-silver-king-hf5sk471-1-quart-hydronic-formula-5-hot-water)

## Best For

- silver king enthusiasts

## Why This Product

- Trusted silver king brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Silver King HF5SK471 1 Quart Hydronic Formula #5 Hot Water Systems Boiler Cleaner Inhibitor With Silicone SK-471

## Product Details

- **Brand:** Silver King
- **Item Volume:** 1 Quarts
- **Unit Count:** 32.0 Fluid Ounces
- **Number of Items:** 1
- **Contains Liquid Contents:** Yes

## Images

![Silver King HF5SK471 1 Quart Hydronic Formula #5 Hot Water Systems Boiler Cleaner Inhibitor With Silicone SK-471 - Image 1](https://m.media-amazon.com/images/I/41HjxUdxV8L.jpg)

## Questions & Answers

**Q: Safe for systems that have pex?**
A: It hasn't arrived yet. I think it is lost in the mail.  Let's hope so, because the people who installed our new heating system used it and we have pex.

**Q: Is this safe on Pex tubing?**
A: silicone base product should not harm Pex tubing

**Q: .The description says steam boilers but the bottle in the picture says hot water systems. Which is it? There is a difference..**
A: I have been using it for hot water heating for years.  I wouldn't think should be used for a steam system

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best Boiler Additive
*by W***K on November 4, 2023*

I have been using this for a very long time. It turns all the orange rust deposits in your boiler black and stops any further corrosion. It helps with heat transfer as well.Sincerely,William McCormick

### ⭐⭐⭐⭐⭐ The product is fabulous. Quieted a hydronic boiler down. Resolved makeup water issue
*by J***T on April 7, 2023*

Great product. Not happy that it was a buy again and Hardware USA sent me the wrong product ,which I had to pay almost as much to ship back as the 2nd buy again. No more Hardware Usa for me.

### ⭐⭐ Not impressed by this product.
*by E***. on August 3, 2018*

I have used this product for the past 3 years in my Peerless 3 section boiler. This is the 4th year I am adding the product according to directions. I use the full bottle.As my photos show, the inside of a Honeywell zone valve and a Taco 007 pump are coated with a black film. I was under the impression this product kept the system clean and lubricated. The little water I drained out of the system when changing the pump and zone valve did not look dirty. Slightly brown. I don't think this is a good boiler cleaner. But I do like the idea of a silicone lubricant kept in the system throughout the year.I have no way of telling how bad the pump and valve would have looked if I had not used the product, or had I used a different product.

## Frequently Bought Together

- Silver King HF5SK471 1 Quart Hydronic Formula #5 Hot Water Systems Boiler Cleaner Inhibitor With Silicone SK-471
- Septic Tank Treatment - 1 Year Supply of Septic Safe Dissolvable Easy Flush Live Bacteria Packets (12 Count) - Best Way to Prevent Expensive Sewage Backups - Made in USA

---

## 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.co.th/products/56843548-silver-king-hf5sk471-1-quart-hydronic-formula-5-hot-water](https://www.desertcart.co.th/products/56843548-silver-king-hf5sk471-1-quart-hydronic-formula-5-hot-water)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-22*