Industrial adhesives
Items are being added
KIT is adding items to this category. If you need a specific part, please send a quote request.
Frequently asked questions
How do epoxy, cyanoacrylate and polyurethane adhesives differ?
Cyanoacrylate (super glue) cures in seconds, suited to small tight-gap parts, but is brittle with poor heat resistance. Two-part epoxy gives high strength and chemical resistance and fills larger gaps. Polyurethane stays tough and flexible, suited to dissimilar materials with different thermal expansion.
Can PE, PP or PTFE plastics be bonded?
These low surface energy plastics are very hard to bond. Use a polyolefin primer with cyanoacrylate, a structural acrylic made for difficult substrates, or plasma or corona treatment. Bond and pull-test samples before production.
How should surfaces be prepared before bonding?
Degrease with IPA or a suitable solvent, lightly abrade metal for key, then wipe off the dust. Most bond failures come from residual oil, not the adhesive. Bond soon after cleaning to avoid re-oxidation.
What is the difference between open time, fixture time and full cure?
Open time is the window to assemble after mixing or applying. Fixture time is when the joint holds well enough to remove clamps. Full cure, often 24 hours at 25 degrees C, gives the strength shown on the TDS, and low temperatures slow it.
How can a bonded joint be taken apart for repair?
The common approach is local heating, as most structural adhesives soften at around 150 to 250 degrees C. Cyanoacrylate can be softened with acetone or a dedicated debonder. Cured epoxy barely dissolves in solvents and usually has to be separated mechanically after heating.
How should a bonded joint be designed for strength?
Adhesives are strongest in shear and tension and weak in peel or cleavage. Design lap joints with enough bond area and avoid loads concentrated at one edge. A uniform bond line thickness within the maker's recommendation matters just as much.
How should two-part adhesives be mixed?
Mix at exactly the ratio on the pack, by volume or by weight, because an off-ratio mix never fully cures. A dispensing gun with a static mixing nozzle keeps the ratio accurate, and the first bead from the nozzle should be discarded. Do not mix more at once than can be used within the pot life.
How much heat and chemical exposure can adhesives withstand?
Heat resistance varies widely by family: standard cyanoacrylates around 80 degrees C, many structural epoxies around 120 degrees C, and high-temperature grades considerably more. Resistance to oil, fuel and solvents must be checked in the technical data sheet (TDS). Test on samples when operating conditions are severe.
