Resorcinol glue, also known as resorcinol-formaldehyde, is an adhesive combination of resin and hardener that withstands long-term water

immersion Immersion may refer to: The arts * "Immersion", a 2012 story by Aliette de Bodard * ''Immersion'', a French comic book series by Léo Quievreux * ''Immersion'' (album), the third album by Australian group Pendulum * ''Immersion'' (film), a 2021 ...

and has high resistance to ultraviolet light.Johnson, W. Curtis (September–October 1993)
"American Woodworker"
New Track Media. p. 30. The adhesive, introduced in 1943, has been popular in aircraft and boat construction. Until the invention of epoxy resin,

resorcinol Resorcinol (or resorcin) is an organic compound with the formula C6H4(OH)2. It is one of three isomeric benzenediols, the 1,3-isomer (or '' meta''-isomer). Resorcinol crystallizes from benzene as colorless needles that are readily soluble in w ...

was one of the most common marine glues. Unlike epoxy, it does not have gap filling properties, requiring joints to be close fitting and clamped under pressure to achieve good results. The glue comes in two parts — a deep red syrup and a light brown powder that are mixed to form a dark reddish-brown glue. The most common application for resorcinol glue is in adhering the plies of exterior and marine grades of

plywood Plywood is a material manufactured from thin layers or "plies" of wood veneer that are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another. It is an engineered wood from the family of manufactured ...

. It is strong. Currently one of its main uses is to put together plywood, laminated support beams and other wooden structural elements. Wooden airplane frameworks have long been glued with resorcinol formulations. Uncured resorcinol has a relatively short shelf life of about two to three years, depending on storage temperature. Its use has declined since the 1990s due to the ease of use and versatility of

epoxy Epoxy is the family of basic components or cured end products of epoxy resins. Epoxy resins, also known as polyepoxides, are a class of reactive prepolymers and polymers which contain epoxide groups. The epoxide functional group is also coll ...

glues and fillers. Although the greater ease of use and versatility of epoxy makes it much more popular, epoxy has poor UV resistance and in most structural applications has only a modest heat resistance, making it less than ideal for many outdoor uses. Resorcinol remains a suitable adhesive for exterior and marine use. Unlike epoxy, it is not gap-filling, so requires a higher standard of workmanship and joint fitting.

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Adhesives {{material-stub

See also

References