Gorilla Original Waterproof Polyurethane Glue - 36 oz Bottle (Pack of 3) - Strong Bonding Adhesive for Wood, Metal, Ceramic & More - Ideal for DIY Projects, Home Repairs & Outdoor Use

I have been using different versions of this type of product for many years. This is a urethane based adhesive. There are several of them available on the market today, and this is the best known of the bunch. That doesn't mean it is any better than the others, but certainly not any worse either. When you make this purchase you are faced with the question of how large of a bottle to purchase. I would recommend that you think carefully about this. For most wood applications, it doesn't take a lot of this glue to do the job. Here is an example... I had to completely refit and glue up a set of eight (8) dining room chairs. All of the original glue joints were working loose. The original glue used was one of the standard white or yellow "carpenter's" glues. They worked well for more than ten years, but eventually failed due to rocking motions and sliding them across the floor. I completely refit and glued up all eight of those chairs with this one 4 ounce bottle. So, only choose the larger bottles if you have large projects or you are "sloppy" or "over generous" with your application rates (Incidentally...more is NOT better..!!).This glue works as advertised. It is incredibly strong and waterproof. One of the main features (and concerns..) is it's tendency to expand and fill openings. If you have a tight fit and are securely clamped, the glue will tend to penetrate into the softer wood substrates and fill all of the wood pores and the available space. This is a GOOD thing. If, on the other hand, your joint is not fitted tightly, the glue will still expand and will fill available space but will not penetrate into the wood as much. This is still better than the older carpenter's glues in this respect. But you need to clamp securely to get the best results.In any event, this glue is like all urethane glues. It requires a certain amount of moisture or humidity in and around the joint for the glue to set properly. This is a difficult concept for some folks to understand. This glue will not perform as intended if the materials are very dry and the humidity in the air is low. It NEEDS some amount of moisture in some manner for the glue to function as designed and to reach maximum strength. When I use this product I always moisten the surface of the wood slightly. I use a small sponge that is wrung out almost dry and then rub it firmly across the wood of the joint enough so that the moisture is evident. The wood will turn slightly darker as it absorbs moisture. Wait for about five minutes and then do it again. You want the wood to be very slightly damp only...NOT wet or dripping water. The glue will take care of the rest..!!! Another thing to remember is that the glue does expand... It will push out of the joint. Watch for the glue and the bubbly look and clean it off as you wait for it to set. Keep a dry cloth handy and one dampened with paint thinner or a similar solvent. Once the glue sets completely and dries, you will meet a file or a chisel to remove it.....The last thing to remember is that this glue is activated by moisture and will set up in the nozzle and the bottle if you are not careful. So, here is a professional tip for you.... You can squeeze the bottle slightly to remove the air before you put on the cap. This is what the manufacturer recommends...and it works okay as long as the bottle is nearly full. As the bottle empties, it is harder and harder to achieve the "full bottle" situation. SO.... When you are ready to end your project and wish to keep the rest of the glue for next time..... Remove the cap and drop CLEAN and DRY marbles or steel balls into the bottle. REMEMBER, clean and dry.!! The balls will take up the available space and force the air out of the bottle as the level of the glue rises toward the top. When it gets almost to the top, replace the lid TIGHTLY and then gently squeeze the bottle to remove the very last remnants of air before tightening down the twist cap. If you can keep the bottle full (in some way..) the glue will last a lot longer in the bottle. It will still eventually harden....that is one of the detractors of this glue.... but it will last a lot longer.Incidentally, for those who care, you can do almost the same thing with other products like this. What damages left over paint the most is a partially filled can. To stop it, just replace the lid very tightly and then turn the can upside down. the paint will then stay at the top, and all of the skin and crap will be at the bottom of the can. Same with other wood finishes like polyurethane or varnish or ...??? Just fill the can with marbles (if its a small can..) or tightly close the container and store upside down. It won't keep forever, but it will allow you to store it for awhile ... maybe until your next use.!!!!Anyway, Gorilla Glue.... Five stars. Excellent product when used as designed. Very high strength and waterproof. Can't ask for more than that....