PC Products PC-7 Epoxy Adhesive Paste, Two-Part Heavy Duty, 1/2lb in Two Cans, Charcoal Gray 87770

Consistent good results:I used it for two weeks now and made about 6-7 batches to glue metal banisters into the handrail of my staircase. Each batch cured well and there seems no difference in the end result despite the fact that I didn’t measure anything. I just eyeballed as best as I could.Work time:I actually don’t know! I used each batch within about an hour after mixing at about 70 degrees and low humidity. I noticed it got a little stiffer, but otherwise still as sticky as before.Cure time:After 24 hours it was very hard but had some minimal flexibility and after 48 hours it appears fully cured. However, this material doesn’t become brittle, which is important for my application as there is always going to be movement between the wood and metal.Consistency of paste and mixing:Each component has a distinctive different consistency. The light gray (part 1) is somewhat crumbly, grainy and slightly sticky. You can get it easily out of the can and reasonably well of the spatula that I used to scrape it out of the can. The pitch-black hardener (part 2) is a totally different story. It is annoyingly sticky and although thick, will slowly flow. Think of ultra-thick honey. This makes it a pain to get out of the can and very difficult to get off the spatula.Now to the mixing part. Somewhat difficult because it is sticky and thick, but within 3-5 minutes you end up with a dark grey paste that has the consistency of chewing gum. When you try to lift a small amount off the mixture, you will stretch the material until it gets thin enough to break off. For me, the best tool was a disposable chop stick which I rolled back and forth to capture the stretched-out material.Stickiness:I had to work it into the wood grain for it to stick well. For example, if I would drop a small amount on a smooth surface, I would suspect you could easily pry it off once it is cured. But once it is pressed into place it will never come off.Flow properties while uncured:As I alluded to before, this material will flow a little bit over the course of 1-2 hours. In my case, I had to smear it into the holes at the bottom of the handrail. It worked reasonable well, but you can't put too much in the hole or it will slowly flow out.

Used this stuff to repair a pitted, rusty bulkhead door. Cleaned the rust to shiny bare metal (important!) with a grinder then smeared the epoxy on with a putty knife. Worked great.I highly recommend wearing disposable gloves cuz this stuff is thick and sticky. 50/50 mix makes measuring simple. Use a stiff knife on a board or other stiff surface. A paper cup won’t cut it!Mix well. Hardens in 24 hours if 70 degrees.

I find a lot of excellent and helpful reviews here that all acknowledge that this is a demanding and challenging material to work with UNLESS you know what you are doing and THEN it is a very strong and long lasting material with many uses. Xylene is practically necessary. The value of being able to clean mixing surfaces and application tools INSTANTLY can't be overstated. This is probably the most difficult mixing I've seen with any material but it always works with the right tools and a little patience and the result is a heavy thick paste that gravity can sag before it fully sets hours later. That elastic strength is why it is one CRITICAL step in many demanding situations. I often like to use a thinner penetrating mixture first and follow it with this before fully cured until almost flush. Then I will usually finish with a finishing mix skim coat. Works great for me. I recommend every handy man or woman that doesn't know this stuff to get some to experiment with. Then you'll know what you're doing and what you can do with it. It lasts for years, even half used. I won't be without some on hand. Note: don't try to work this before it is half cured when you can scrape and carve it beautifully with different tools. Sanding shouldn't be attempted before full cured. Once cured, a lot of rocks wish they were this strong and the bond will be crazy good if you follow the easy steps.

I used PC7 as a filler to level an uneven tile that had shifted about 1/4 inch lower than the rest. The product worked really well—it's thick, easy to mold into place, and hardens solid. I left it to cure for about 48 hours to ensure maximum strength, and it held up perfectly. Highly recommend for similar leveling or repair jobs. Only down side is sanding after if needed. It leave the finish very rough and may want to paint after

It works great, The reason I could not give it higher marks is because you must know what the heck your doing. The epoxy and the resin hardener are not easy to mix and equal portions is most important. It is not a liquid or a gel or even a paste it is a very stiff substance, like C4. But please note that this is where it's strength comes from, and it is not 'easy' to be spread, you should have the right tools and know exactly what you are going to do with it. Cleanup will require something strong if you make a mistake (xylene). The important thing is you can fabricate anything , I have even used it the weld two pieces of hardened plastics. This will outlast any 3D printed piece , and I have used it even on my siding that had a couple of bullet holes. I applied the material in a measured amount, using a flexible putty knife. Then I removed any excess with the aforementioned solvent. A day later in 40 degree weather it hard enough to apply a small hand sander to feather out. Then I painted over it- and viola- bullet holes are gone and can now sell my house without question. Fixed broken lamps, works great with metal and glass and hard synthetic surfaces. Not the best for softwoods- lastly- as long as you don't mix it it will last forever- I still have some that was from 35 years ago, and I tried it wondering how it would do. The catalyst did take about twice as long to work but in two days it was as hard as a rock- It's aquarium safe- but wait a few days for complete cure and then was product of with soap and rinse well

Used for repairing rotted wood. Its a good product, very sticky and needs to be applied carefully. it mixes well. I like the 1 hour work time which for my application is ideal.