JB Weld Original Cold-Weld 8265-SUK Steel Reinforced Epoxy - Dark Grey (Packaging may vary)

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Also, adding reinforcement can increase the strength of the joint. Bonding additional pieces of wood or metal over an epoxied joint can mechanically stiffen the joint and help it to better withstand the variety of forces that act on it. While epoxies are some of the strongest adhesives in the world, they aren't perfect and have their weaknesses. One of those weaknesses is dealing with water. While water won't fully dissolve epoxy, it does affect an epoxies structure and ultimately weakens it. This makes it so that epoxies are not waterproof, but merely water resistant. Therefore, there's a need to add a stabilizer to the epoxy when used in applications where the epoxy is likely to be submerged in water. We’ve got nothing against epoxy, but that claim, “tougher than steel,” is an exaggeration. You can’t take epoxy and form it into a drill bit or a cutter for a milling machine. Still, epoxy is tough stuff. For repair purposes, it has a lot to offer. It’s versatile, and it can be successfully applied by amateurs.

J-B Weld can be used to bond surfaces made from metal, porcelain, ceramic, glass, marble, PVC, ABS, concrete, fiberglass, wood, fabric, or paper. [7] [8] Alcohol should be avoided when cleaning surfaces, as it can degrade the bond. [9] Generally speaking, these waterproof epoxies are referred to as "marine epoxies" because they are primarily used for the manufacture and maintenance of boats. All marine epoxies are water stabilized, ensuring that their bond isn't compromised by continual submersion in water. Since 2008, the company has broadened the product line to add J-B SteelStik, KwikWood, PlasticWeld, MarineWeld, Perm-O-Seal, WoodWeld and ClearWeld. [5] [6] J-B Weld epoxy [ edit ] After the initial setting period of a few hours, heat (e.g. from a heat lamp or incandescent light bulb placed near the bond) will speed the curing time. [2] [7] There are a few automotive aphorisms that people dispense like hot dogs at a barbecue when what you really want is a cheeseburger. One is, after seeing a photo of an accident, “That’ll buff out.” Another is “LS1 it” (drop a Corvette engine in a car in need of a motor, usually a woeful rat of a car worth less than the LS1). Both sayings are usually offered with a heavy dose of irony. But a third, “Just J-B Weld it,” is often said seriously.The company had its beginnings in 1969 [3] in Sulphur Springs, Texas. Sam Bonham, at the time running a machine shop, discovered a way to create what he called a "tougher than steel" epoxy. [3] In 1968, Sam's future wife Mary persuaded him to sell his invention and he founded the J-B Weld Company. Sam died suddenly in 1989. He had commented before his death, "My life's dream is for J-B Weld to be all the way around the world, and for me to see an 18-wheeler load out of here with nothing but J-B Weld." [3] Within a year of his death, Mary had opened a European hub in London, internationalizing the J-B Weld Company and the distribution of the product. [3]

While epoxy isn't used all that often with wood, there are some applications where it is an excellent combination. More than anything, we find it used in marine applications. Boats often have wood structures under their fiberglass skins. The two are often bonded together with epoxy, as using fasteners would cause the fastener heads to pull through the fiberglass.Like all other epoxies, these are two-part adhesives which must be mixed to cure. Curing is a chemical reaction rather than the drying most adhesives depend upon. This means that these adhesives will cure in any environment, even when they're submerged in water. In this manner, two pieces of metal joined together by epoxy can be almost as strong as one piece. In restoration of vehicles, it's quite common for metal parts to be rusted thin to the point of not having enough structural strength. Bonding another layer of metal to the original part with the use of a good epoxy can provide as much strength as replacing the part itself. This type of repair is especially useful when the original part can't be removed for replacement. And, regarding my BMW 2002tii, if the J-B Weld patch fails and I can’t find a replacement cylinder head, I can always, you know, just LS1 it.

The mixture will set enough for the glued parts to be handled within 4–6 hours, [7] but requires up to 15 hours at cool temperatures to fully cure and harden. Temperatures above 50°F (10°C) shorten all these times. [7] The world of adhesive is vast and sprawling, but the king of the hill has to be epoxy. There is a special kind of epoxy for every application from simple, wooden joinery to plugging leaks in boat hulls. Choose the right one and the end result will be a joint or repair that is both strong and astoundingly long lived. J-B Weld can be used as an adhesive, laminate, plug, filler, sealant, or electrical insulator. [8] When fully cured, J-B Weld can be drilled, formed, ground, tapped, machined, sanded, and painted. [8] Surface prep is key. Clean is good, but rough is better. The epoxy needs to grab onto the surface. If there are edges, the epoxy can grab on to, the adhesion will be better.

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Countering that is the fact that wood is a very easy substrate for adhesives to bond to. Although usually smaller than the human eye can see, wood is porous, allowing the epoxy to enter into the pores and get a good "grip" on it. This is magnified with open grain woods, like oak, which have more surface area for the epoxy to grip to. So, chances are that the epoxy isn't going to come loose of the wood. In fact, if the joint fails, it will be the wood itself that fails, not the adhesive to wood interface.