---
product_id: 734582170
title: "900 Moldable Silicone Putty - Black"
brand: "e/fusing"
price: "$52.66"
currency: USD
in_stock: true
reviews_count: 5
category: "E/Fusing"
url: https://www.desertcart.us/products/734582170-900-moldable-silicone-putty-black
store_origin: US
region: United States of America
---

# Compatible with E/Fusing 140 & 330 tapes Seals pinhole leaks on pipes & hoses 3.21 oz moldable silicone putty 900 Moldable Silicone Putty - Black

**Brand:** e/fusing
**Price:** $52.66
**Availability:** ✅ In Stock

## Summary

> 🛠️ Mold it. Seal it. Forget leaks forever.

## Quick Answers

- **What is this?** 900 Moldable Silicone Putty - Black by e/fusing
- **How much does it cost?** $52.66 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/734582170-900-moldable-silicone-putty-black)

## Best For

- e/fusing enthusiasts

## Why This Product

- Trusted e/fusing brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Application:** Ideal for air, steam, and water leaks on pipes, hoses, and even RV window seals—don’t get caught unprepared.
- • **Lightweight & Portable:** Compact 3.21-ounce package fits easily in your toolkit or emergency repair kit.
- • **Precision Leak Sealing:** Moldable silicone putty that fits perfectly into tiny cracks and pinholes for airtight, watertight repairs.
- • **Seamless Reinforcement:** Works hand-in-hand with E/Fusing 140 or 330 tapes to create a durable, reinforced seal.
- • **Made in the USA Quality:** Crafted domestically to ensure premium reliability and performance you can trust.

## Overview

MIDSUN E/FUSING 900 is a 3.21-ounce moldable silicone putty made in the USA, designed to seal pinhole leaks and cracks in pipes and hoses. It pairs perfectly with E/Fusing 140 or 330 tapes to reinforce and secure airtight and watertight repairs, making it an essential tool for quick, reliable leak fixes in home, automotive, and industrial settings.

## Description

MIDSUN E/FUSING 900 is a silicone putty for use in cracks and voids in damaged pipes or hoses. Molds easily into small cracks or pinholes on pipes or rigid hoses. Excellent assistance in sealing air and steam leaks with other E/Fusing tapes.

Review: Funciona bien
Review: I needed this to seal a couple of spots in my RV, where water was finding its way through the driver's door window seals. It's very easy to apply and to mould. After a few rain storms, the leaks were finally confirmed gone. Recommended stuff.

## Features

- Made in USA
- Mold into pinhole leaks on pipelines to assist in leak sealing
- Use E/Fusing 140 or E/Fusing 330 to wrap and reinforce seal
- Package weight of the Product:3.21 Ounces

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B6JRZQKG |
| Best Sellers Rank | #171,004 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #795 in Hardware Sealers |
| Item model number | 764759690027 |
| Manufacturer | Midsun Specialty Products |
| Package Dimensions | 10.16 x 8.64 x 3.81 cm; 91 g |

## Product Details

- **Brand:** E/FUSING
- **Item form:** Putty
- **Material:** Silicone
- **Special features:** Waterproof
- **Specific uses for product:** Pipe Repair, Leak Sealing

## Images

![900 Moldable Silicone Putty - Black - Image 1](https://m.media-amazon.com/images/I/51a5j+cn6ML.jpg)

## Questions & Answers

**Q: Does it become hard once set? Wanting to use as a mother mold**
A: It never sets - it remains soft and pliable. I would use hydrocal for the mother mold or reinforced fiberglass with epoxy.

**Q: Does this cure flexible or rigid?**
A: This product does not cure at all. It remains pliable indefinitely

**Q: Does this putty maintain its shape once molded, like modeling clay, or does gravity cause it to melt back down?**
A: Yes and it was very easy to work with. it did not stick to you hands and you could mold it very easy.

**Q: Wrap around outdoor speaker wire (binding post connection) for additional waterproofing? Want something removable for winter storage of speakers.**
A: This is potentially messy for that application. Try using E/FUSING 112 to wrap wires to protect them from elements.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***S on 3 June 2024*

Funciona bien

### ⭐⭐⭐⭐⭐ Review
*by H***N on 8 November 2024*

I needed this to seal a couple of spots in my RV, where water was finding its way through the driver's door window seals. It's very easy to apply and to mould. After a few rain storms, the leaks were finally confirmed gone. Recommended stuff.

### ⭐⭐⭐⭐⭐ Review
*by D***D on 16 September 2023*

I had to remove a front metal panel to access my air conditioning evaporator on top of my heater. (The coils needed defrosting). All went well, but I had trouble replacing the panel. It would not go into its slot, and the screw holes would not line up. After careful analysis, I realized that I had to completely remove the old putty, reinstall the panel, and and then seal where the pipes came out with new putty. The old putty was still soft, but not very malleable. The E/FUSING 900 Moldable Silicone Putty was very easy to work with, and sealed perfectly. It saved me the cost of a service call. It is clean to work with -- not oily, not smudgy, non-staining, and just the right amount of malleability. I expect it to retain its shape and seal forever. In the photo, the black putty is the E900. The gray putty is the original putty from when the heater and A/C was installed. I WOULD LIKE TO SHARE A LESSON LEARNED: Change your heater-A/C filter frequently enough so that it does not become clogged. Otherwise you can end up with a block of ice around your evaporator coils, reduced flow of cold air, blocked and overflowing condensate drainage and insufficient air conditioning.

## Frequently Bought Together

- 900 Moldable Silicone Putty - Black
- Rectorseal 81880 1-Pound Duct Seal Compound Gray
- Zxfuture Pack of 8 White Seal Putty Waterproof Duct Seal Repair Sealing Clay, Quick Mending Mud for Drain Connection, Wall Hole, Air Conditioning Hole

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-17*