ComStar Copper Lock No-Heat Liquid Solder 2 oz
- No-heat liquid solder for pipe and coupling joints
- Copper, brass and yellow metals listed as compatible
- 1 minute full cure, water resistant
- 500 pounds per square foot tensile strength as listed
- Pipes only, not for sheets or jewelry
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A no-heat liquid solder for joining pipe and couplings in copper and brass, with a quick cure. The maker limits it to pipes only, so it is not a general metal adhesive.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B004Y753FMCategory: Pipe Bonding Adhesives
Sizes Available
Need a different one? Pick on Amazon →
Overview
A cold-applied liquid solder is the working part here, spread between pipe and coupling to form a permanent bond. It comes in a plastic container and needs no flame.
Skipping heat removes the soldering step entirely, and the quick cure shortens the wait around a finished joint. The limitation is scope: the maker restricts it to pipes only, and the listing gives no pressure or temperature rating for the joint.
Who it's for
Maintenance staff and home owners joining copper or brass pipe and couplings can work without a heat source. Sheet metal, jewelry and any joint that needs a stated pressure rating call for another product.
Pros and cons
- No heat needed
- Fast full cure time
- Water resistant bond
- Bonds copper, brass and yellow metals
- Pipes only, not sheets or jewelry
- No pressure rating given
- Seller description is empty
Performance notes
A medium viscosity liquid stays where it is applied on pipe and coupling surfaces, then reaches full cure in about one minute per the listing. The finished bond is water resistant with a stated tensile strength, but the listing does not describe surface preparation or joint pressure limits.
Specifications
| Brand | ComStar |
|---|---|
| Dimensions & fit | |
| Weight | 2 ounces |
| Capacity & performance | |
| Volume | 2 fluid ounces |
| Construction & materials | |
| Compatible materials | Copper, brass, yellow metals |
| Color | Red |
| Included components | |
| Included | Liquid |
| Other details | |
| Use | Pipes and couplings only, industrial use |
| Form | Liquid |
| Viscosity | Medium |
| Full cure time | 1 minute |
| Tensile strength | 500 pounds per square foot |
| Water resistance | Water resistant |
| Container | Plastic container |
Frequently asked questions
What size is the Copper Lock liquid solder container?
It is a plastic container holding 2 fluid ounces.
Can Copper Lock be used on sheet metal or jewelry?
No. The listing says it makes a permanent bond for pipes only and is not intended for sheets or jewelry.
Do I need a torch with ComStar Copper Lock?
No heat is needed. The product is listed as a no-heat liquid solder.