Saildrive fairing and Gorilla glue.

XDC

XDC

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Boat was hauled today, a couple of inches of rubber fairing have peeled from the hull.

Local chandlers only stock Gorilla glue “because people like it”. Chap thought my question about the glues suitability was “a bit mechanical”

Here’s the description:

The product that started it all. Original Gorilla Glue built a name for itself with its incredible, industrial holding power and versatility. The water activated polyurethane formula expands into materials to form an incredibly strong bond to virtually anything. Gorilla Glue is a 100% waterproof glue, safe for indoor and outdoor use and strong enough to stand up to the elements. Gorilla Glue’s your solution for almost any project or repair. Sand it, paint it, stain it. Simply stated, it’s the Toughest Glue on Planet Earth.

Any thoughts?

Thanks, need to do the job tomorrow.
 
I think the difficulty with Gorilla glue, excellent though it is, is that it expands a lot and it might be hard to keep the cover closely flush while it is setting.
 
XDC said:
Boat was hauled today, a couple of inches of rubber fairing have peeled from the hull.

Local chandlers only stock Gorilla glue “because people like it”. Chap thought my question about the glues suitability was “a bit mechanical”

Here’s the description:

The product that started it all. Original Gorilla Glue built a name for itself with its incredible, industrial holding power and versatility. The water activated polyurethane formula expands into materials to form an incredibly strong bond to virtually anything. Gorilla Glue is a 100% waterproof glue, safe for indoor and outdoor use and strong enough to stand up to the elements. Gorilla Glue’s your solution for almost any project or repair. Sand it, paint it, stain it. Simply stated, it’s the Toughest Glue on Planet Earth.

Any thoughts?

Thanks, need to do the job tomorrow.
Click to expand...

The original Gorilla glue ( likewise the clar nonfoaming verions, is not suitable for rubber!
https://uk-gorillaglue-com.exactdn.com/wp-content/uploads/2019/04/GOR-Glue-Guide-A4-2018-Screen.pdf

From the Gorilla range the only one suitable is the "Grab adhesive" but you might look at the suitability of other polyurethane adhesives such as Sikaflex 292 or Everbulld ( a Sika group company) Puraflex 40 (PU40) which you find in such places as Toolststion.

See the range of Everbuild adhesives here https://www.everbuild.co.uk/products/
 
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Chuck the rubber & fill the void so that it finishes flush with the hull with good quality sponge from a cushion
Stick in place with copious amounts of Wickes builders adhesive
Smear some grease on the exposed surface after to prevent weed growth
 
I tried CT1 but at next haul out the fairing was hanging loose. Following strong recommendations I then used a two part Evostik which lasted for 3 years...until found it hanging loose on last haul out.
If anyone has any first hand experience of a suitable long lasting adhesive I'll give it a try; otherwise I'll fall back on that Evostik stuff but take extra care on abrasion and cleaning the surface
 
Gorrilla glue is a triumph of good marketing. It is nothing more than a single pack moisture cured Polyurethane glue, If i remember correctly the first one on the market years ago was Balcotan, Titebond also do one.
It is not strong & does not last. I dismantled some boat parts last year that had been glued with PU glue 5 years ago & was surprised how easy it was to get apart. I would not use it anywhere structural.
 
Keith 66 said:
Gorrilla glue is a triumph of good marketing. It is nothing more than a single pack moisture cured Polyurethane glue, If i remember correctly the first one on the market years ago was Balcotan, Titebond also do one....
Click to expand...


I think you have cracked it there. American marketing is always slick even where there is little substance to the product. I speak as one who bought Hush Puppies in the 1960's.

It does gap fill well but there is little strength in a poor fit.
They do a range of glues one of which seems to be a PVA variant which comes in a handy size bottle for keeping on the boat.
 
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XDC said:
Boat was hauled today, a couple of inches of rubber fairing have peeled from the hull.

Local chandlers only stock Gorilla glue “because people like it”. Chap thought my question about the glues suitability was “a bit mechanical”

Here’s the description:

The product that started it all. Original Gorilla Glue built a name for itself with its incredible, industrial holding power and versatility. The water activated polyurethane formula expands into materials to form an incredibly strong bond to virtually anything. Gorilla Glue is a 100% waterproof glue, safe for indoor and outdoor use and strong enough to stand up to the elements. Gorilla Glue’s your solution for almost any project or repair. Sand it, paint it, stain it. Simply stated, it’s the Toughest Glue on Planet Earth.

Any thoughts?

Thanks, need to do the job tomorrow.
Click to expand...

Some time ago found this video on U-Tube. It compares Gorilla with some other glues.
https://www.youtube.com/watch?v=H4xX7VecgzA&t=763s
Spoiler: It doesn't fare too good - and it matches my own experience. In accord with the video, I made the best experience with JB Weld which gave me excellent results in some even in some cases I considered crazy to even attempt. The most relevant to your problem: I glued a rubber sole to my leather shoe with it about 6 moths ago. It still holds fast, despite of the shoe getting soaking wet a few times during this period. Something, I would never believe! Give it a try.
 
I'm carrying out a personal embargo against American products in retaliation against trumps policies so will not be buy I any more. Unfortunately I have several gorilla products already (my embargo doesn't extend to stuff i have already paid for). My experience of their superglue ismthat its no different to other suppliers products. As others have said, misleading and exaggerated claims.
 
Odd how things work out.

Arrived at the boat and having been unable to find CT1 or Sika 292 (291 seems to be more a sealant than an adhesive) I had resolved to go to a nearby Halfords and buy either Evo-Stick Serious Glue or Contact Adhesive. Remember I was in a hurry, can’t go to the boat Sunday, launching Monday.

Saw a chap two boats up huddled around his saildrive doing the same job and found out that his Volvo dealer had told him they use TGP (The Glue People) Contact Adhesive.

Bizarrely the chandlery I mentioned had it in stock and £8.90 later I have a bonded fairing and a tin with probably 90% of its contents unused.

Thanks as usual for all the input. Greatly appreciated.
 
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