Glue for teak

[JIM_TERN]

I have to remake a scarf joint in a teak gunwhale. Which is the best glue Polyurethane eg Gorilla or Epoxy. I have both available.
I know about degreasing teak before application.
Jim J

 

[Tranona]

Either. Don't overclamp and if using epoxy apply neat first then a coat thickened with collodial silica

 

[nigelmercier]

Neither!

Epoxy will stain the wood, Gorilla glue is messy.

Cascamite would be my choice.

 

[yoda]

Polyurethane would be my choice.

Yoda

 

[sailorman]

Polyvine CASCOPHEN Wood Adhesives from amazon

 

[LadyInBed]

Polyvine CASCOPHEN Wood Adhesives from amazon

Thanks, I didn't know of that one.

 

[sailorman]

When boat fitting out we always used Aerodux 500 or the 1 made by Borden, that was better as it didnt show a glue line, the 500 is brown so a light line visible

 

[PlankWalker]

I've glued up a lot of teak using epoxy more than 5 gallons of it.
Wouldn't use anything else.

Plank.

 

[Yngmar]

This is one of those wonderful situations where the cheapest and oldest product is the best (yes, even better than epoxy): PVA glue (aka carpenter's glue), the waterproof type. Widely available, easy to use, lasts forever and is dirt cheap.

 

[geem]

Polyvine CASCOPHEN Wood Adhesives from amazon

Isnt that an epoxy?

 

[ex-Gladys]

Nope... From aircraftspruce.com

"A Resorcinol Formaldehyde Adhesive capable of curing at room temperature and providing strong, durable, waterproof bonds. Comes in two parts, a liquid resin (part A) and a powered catalyst (part B). the liquid resin is an alcohol-water solution of a partially condensed resorcinol-formaldehyde resin containing a suitable reinforcing cellulosic filler. The hardener is a tan powder formulated from paraformaldehyde and a suitable cellulosic filler.

Produces a cured glue line which is resistant to fresh water or salt water, most acids and organic solvents, and lubricating oils and greases. Being thermoset, the bond is resistant to elevated temps. and conversely, no loss in bond strength occurs at temperatures as low as -40°F. These features make it advantageous for use as a general marine and aircraft use. It provides strong bonds between many wood and non-wood surfaces. These include treated woods, many plastics, natural and synthetic rubber, primed metal, leather, textiles, paper and fiber boards."

 

[macd]

Isnt that an epoxy?

No, but it is a two-pack. Polyproof, according to the data sheet, contains resorcinol, well-known to boat-builders of a certain age.
See: http://www.polyvine.com/index.php?o...&product_id=6558&lang=en#storage-and-safety-2

Wiki has this to say:
Resorcinol glue, also known as resorcinol-formaldahyde, is an adhesive combination of resin and hardener that withstands long-term water immersion and has high resistance to ultraviolet light. The adhesive, introduced in 1943, has been popular in aircraft and boat construction.

Until the invention of epoxy resin, resorcinol 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 came in two parts — a red syrup and a light brown powder that were mixed to form glue. 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 glues and fillers.

For purists, the first epoxies actually pre-date resorcinol glue

P.S. Gladys must type faster

 

[ex-Gladys]

P.S. Gladys must type faster

No, just cut &paste!

 

[Minchsailor]

For wood work, I quite like Cascamite. Powder, dissolved in water. waterprooof when cured, non-staining, as strong as the wood.