Green Tracing Dye - Highly Visible Concentrated Fluorescent Leak Detection Dye - 1 Gallon

Easy to see in daylight. Used it to confirm patency of positive crawl space drain.

So easy to use … no mess and brute color

Fantastic non-toxic product!! I put in small containers with eyedroppers and put in a plumbing service truck for dye testing toilets and other plumbing service issues. Three or four drops of this in a toilet will get the job done better than 1/3 of a bottle of food coloring. So glad I found this non-toxic product, make me less nervous about kids or pets while Im working in someones home.

The liquid was not green at all, and was closer to a red black and totally useless.

This product proved conclusively that during a heavy rain water flowing under my land from a road catch basin had long ago found a way out of an apparently broken drain pipe and caused a large cave-in on my driveway. Hole is 40 inches wide and 40 inches deep, and also extends an unknown distance under the asphalt that is still intact. My town cannot dispute the results and will remedy the situation and repair my driveway. The photo shows the green dye just arriving in the big hole several minutes after I poured some into the catch basin on the road during a heavy rain.

Just what I needed .

Very easy to use and effective. Very good value.

Tracing pipes

Used this product for tracing sewers in a network-product performs great. Ordered 1 gallon through Amazon previously, this time I ordered 2 and unfortunately 1 of the caps slightly loosened and began leaking. Each of the gallons were in sealed plastic bags but the one bag was not sealed 100% tight. Caught this before it turned into a disaster as this is basically the stuff they dye the Chicago River with on St Patricks day so potential for huge mess. Suggest redundant bags for preventing leaks and bubble wrap when multiple containers sent in same box.

Easy, found & marked hot tub leak