Gorilla and other PU glues
Hi, guys, I have discovered a couple of failings with the foaming type PU glues such as Gorilla and Lumberjack.
It seems that these glues are not very effective for gluing plywood which will take any kind of strain or be subject to changes in temperature, humidity or stress.
Happily I decided to test the PU glues on some unimportant work before committing it to boat repairs or building.
Experience of joints made about a year ago suggests that these glues get very brittle with age and start to break down with weathering - even though applied correctly and protected from the elements.
This was over a comparatively short period.
Delamination of the glue from the surface of the wood is also apparent, possibly due to the natural oil content of the hardwoods used in exterior and marine plywood.
Some of the glue joints where the adhesive has filled small gaps, show a crumbling of the hardened glue, and in others the glue has softened to a toffee like mess.
If you are considering using these adhesives on a boat, especially one which remains in the water, I recommend that you do some tests yourself first.
Myself, I will be only using good quality epoxy in future for any job which is of importance.
The quickness and convenience of the PU, does not for me outweigh the strength and reliability of either epoxy or indeed the best fully waterproof PVA adhesives.
Click here to post comments
Return to Your Comments.
Want to add more photos?
Aug 15, 19 02:51 AM
THE ORGANISERS of Shetland Boat Week have hailed this year’s
event as the most successful yet.
Over 500 people flocked to Hay’s Dock in Lerwick each day during the family-friendly event, which took pla…
Aug 15, 19 01:15 AM
Neil Pryde (Formex) Main Sail 42 sqft, Marconi - Luff: 11' 2 and 7' 10 foot. Either Red Stripe on white with white Scamper 60 graphic or yellow & white
Aug 14, 19 04:50 AM
If there's one thing Irv Esters enjoys more than sailing, it's hanging
out with his only grandchild.
Over the last six months, the University of Louisiana Lafayette department head of counselor educati…