---
product_id: 26887593
title: "ComStar Copper Lock, No Heat Solder for Copper & Brass Pipes, Instant Leak-Proof Seal Up to 500 PSI, Handles All Refrigerants, Withstands -60°F to 300°F, 2 oz Bonding Solution for HVAC (10-800)"
brand: "comstar"
price: "$58"
currency: NZD
in_stock: true
reviews_count: 13
category: "Com Star"
url: https://www.desertcart.nz/products/26887593-comstar-copper-lock-no-heat-solder-for-copper-and-brass
store_origin: NZ
region: New Zealand
---

# Withstands 500 PSI pressure Instant bond in <60s Operates -60°F to 300°F ComStar Copper Lock, No Heat Solder for Copper & Brass Pipes, Instant Leak-Proof Seal Up to 500 PSI, Handles All Refrigerants, Withstands -60°F to 300°F, 2 oz Bonding Solution for HVAC (10-800)

**Brand:** comstar
**Price:** $58
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal it fast, seal it strong — no heat, no hassle! 🔧

## Quick Answers

- **What is this?** ComStar Copper Lock, No Heat Solder for Copper & Brass Pipes, Instant Leak-Proof Seal Up to 500 PSI, Handles All Refrigerants, Withstands -60°F to 300°F, 2 oz Bonding Solution for HVAC (10-800) by comstar
- **How much does it cost?** $58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/26887593-comstar-copper-lock-no-heat-solder-for-copper-and-brass)

## Best For

- comstar enthusiasts

## Why This Product

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

## Key Features

- • **Pro-Grade & Trusted:** Exceeds US Military specs and favored by HVAC pros for emergency repairs and upgrades.
- • **All-Season Durability:** Works flawlessly from freezing -60°F to scorching 300°F—perfect for any climate or HVAC system.
- • **Universal Compatibility:** Seals copper, brass, and yellow metals with all refrigerants—one solution for every pipe job.
- • **Pressure-Proof Performance:** Handles up to 500 PSI sealed pressure and 10,000 PSI flow pressure for industrial-grade reliability.
- • **Lightning-Fast Leak Proofing:** Seal copper & brass pipes in under a minute—no torch needed, no downtime.

## Overview

ComStar Copper Lock is a professional-grade, no-heat bonding solution that instantly creates leak-proof seals on copper and brass pipes. Engineered to withstand extreme pressures up to 500 PSI and temperatures from -60°F to 300°F, it’s compatible with all refrigerants and ideal for HVAC and plumbing repairs. Trusted by experts and exceeding military standards, it delivers fast, reliable performance without the need for soldering or flames.

## Description

ComStar Copper Lock, No Heat Solder for Copper & Brass Pipes, Instant Leak-Proof Seal Up to 500 PSI, Handles All Refrigerants, Withstands -60°F to 300°F, 2 oz Bonding Solution for HVAC (10-800): desertcart.com: Tools & Home Improvement

Review: Works great, connected two pipe joints R-22 and no leaks after 6pm the - Wow! This worked great. A friend of mine said it wouldn’t work, but I had a rusted leaking receiver drier on my old R-22 system, I cut it out and replaced with a new one and used this to reconnect it and no leaks, system has been performing great for 6 months now. Even more impressive is that this is close to the condenser and gets a lot of vibration and it’s holding up great
Review: Worked perfect for my application - I replaced my gas water heater and needed to reattach the copper overflow pipe from the pressure release valve. I don’t have experience with copper solder so this was a great alternative. Very easy to use and appears to be a solid bond. I honestly don’t know if I would trust it if the copper pipe was under constant water pressure but for my application it is perfect. If the pressure relief valve pops and water flows into the overflow pipe I am having a bad day and it isn’t going to matter if the pipe leaks a little!

## Features

- INSTANT BOND & SEAL: Achieve a leak-proof connection in under 60 seconds with this powerful no flame pipe adhesive—perfect for emergency repairs, HVAC maintenance, and plumbing upgrades.
- HIGH-PRESSURE PERFORMANCE: Engineered to handle extreme conditions, this pipe sealing compound withstands up to 10,000 PSI flow pressure and 500 PSI contained pressure without compromising the bond.
- UNIVERSAL PIPE COMPATIBILITY: Ideal for copper, brass, and yellow metals, this fast-acting joint solution works with all refrigerants and liquids, making it versatile for various plumbing and A/C systems.
- EXTREME TEMPERATURE RESILIENCE: Designed for demanding environments, this no heat connection formula performs flawlessly between -60°F and +300°F for year-round reliability.
- PROFESSIONAL-GRADE STANDARDS: Trusted by experts and exceeding US Military copper bonding specs, this heat-free sealant delivers exceptional results without a torch or soldering kit.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004Y753FM |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #11,149 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #33 in Solder |
| Brand | ComStar |
| Color | Red |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,093) |
| Date First Available | February 11, 2011 |
| Full Cure Time | 1 Minutes |
| Global Trade Identification Number | 00024924108000 |
| Included Components | Liquid |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 2 Fluid Ounces |
| Item Weight | 2 ounces |
| Item model number | 10-800 |
| Manufacturer | Comstar |
| Material | Copper |
| Package Information | plastic container |
| Part Number | 024924108000 |
| Power Source | Corded Electric |
| Product Dimensions | 5 x 4 x 4 inches |
| Size | 2 fl oz |
| Special Feature | Create a permanent bond for PIPES ONLY - not intended for sheets or jewelry |
| Special Features | Create a permanent bond for PIPES ONLY - not intended for sheets or jewelry |
| Specific Uses For Product | Industrial Use |
| Style | Pipes |
| Tensile Strength | 500 Pounds Per Square Inch |
| Thickness | 4 Inches |
| UPC | 024924108000 |
| Unit Count | 1 Count |
| Viscosity | Moderate |
| Viscosity Level | Medium |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** ComStar
- **Item Form:** Liquid
- **Material:** Copper
- **Special Feature:** Create a permanent bond for PIPES ONLY - not intended for sheets or jewelry
- **Specific Uses For Product:** Industrial Use

## Images

![ComStar Copper Lock, No Heat Solder for Copper & Brass Pipes, Instant Leak-Proof Seal Up to 500 PSI, Handles All Refrigerants, Withstands -60°F to 300°F, 2 oz Bonding Solution for HVAC (10-800) - Image 1](https://m.media-amazon.com/images/I/51jrzT-GQ-L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: 2 copper wires joined?**
A: Copper Lock is will not attached copper wires together.  It works in the absence of oxygen.  Copper Lock be applied to both the exterior of the pipe and the inside of the fitting (male and female)...this would also apply to those situations where you can not turn the pipe immediately after inserting the pipe into the fitting.

**Q: What prep work is required on copper to get a good seal and hold?**
A: Prep Work:  Its best to start with a clean pipe and fitting.  Meaning no oil or dirt on the surface to be connected.  Then, using sand paper or emery cloth, rough up lightly the section of the pipe and the inside of the fitting to be connected...wipe clean and apply the Copper Lock to both the outer pipe surface and the inside of the fitting.  Put together and turn a half revolution...do not try to reposition for about 2 minutes.

**Q: Anyone have ideas for a different solution for this? "I am looking to join two 26 gauge sheets of copper using a simple over lap."**
A: Copper Lock was developed for the US space program to work in the absence of oxygen.  This environment is great for attaching pipes into fittings.  It will not work for the application you do scribe...air will have access via the opening along the sides of the sheets.

**Q: Does this have a copper color to it when cured?**
A: No

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great, connected two pipe joints R-22 and no leaks after 6pm the
*by P***P on January 29, 2026*

Wow! This worked great. A friend of mine said it wouldn’t work, but I had a rusted leaking receiver drier on my old R-22 system, I cut it out and replaced with a new one and used this to reconnect it and no leaks, system has been performing great for 6 months now. Even more impressive is that this is close to the condenser and gets a lot of vibration and it’s holding up great

### ⭐⭐⭐⭐⭐ Worked perfect for my application
*by K***N on January 29, 2026*

I replaced my gas water heater and needed to reattach the copper overflow pipe from the pressure release valve. I don’t have experience with copper solder so this was a great alternative. Very easy to use and appears to be a solid bond. I honestly don’t know if I would trust it if the copper pipe was under constant water pressure but for my application it is perfect. If the pressure relief valve pops and water flows into the overflow pipe I am having a bad day and it isn’t going to matter if the pipe leaks a little!

### ⭐⭐⭐⭐⭐ Works fast!
*by R***. on January 8, 2026*

Great product. Life saver.

## Frequently Bought Together

- ComStar Copper Lock, No Heat Solder for Copper & Brass Pipes, Create A Permanent Leak-Proof Bond Instantly, Made in USA, 2 Ounces (10-800)
- FiberWeld Pipe Repair Cast 2x48 Inch – High Strength Adhesive Fiberglass Wrap – White
- Just For Copper JFC070 Epoxy Putty

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-13*