Club500 rc boat build - Round 4 - Testing a Gorilla

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Gorilla Heavy Duty Grab Adhesive White
100% WATERPROOF: Even bonds under water
Various glues are recommended for the build,
two part Epoxy's or 'builders adhesives'.
All the plastic has a ‘peel off’ clear sheet!
Test 1 - Shiny to shiny
Test 2 - Shiny to Matt
Test 3 Matt to matt
Test 4 Shiny to shiny - ‘keyed’ surface
Dispensing …. Decanting experiment …. into a 20 ml Syringe
Tube comes with a screw on cap,
so pump out a bit extra for cap to compress / seal.
Quick peel / scrape ....
There now follow a short scene from Ted Lasso ( TV series )
Where Nath .... ( my phone camera )
tells Roy Kent .... ( me )
that I hadn’t recorded the sample stress tests!
Basically…. this Gorilla glue,
Does Not Stick to this plastic ….
…. Is it ABS?!!
During the test,
They all peeled off pretty easily,
i.e. I could peel them apart buy just sticking a finger nail under one corner
and pulling them apart.
This Gorilla Heavy Duty Grab Adhesive, Is very low odour,
So I suspect it’s solvent free,
And therefore not etching it way into the material
enough …. or at all !
I was hoping that by Keying the surfaces, it would get a grip…
but No…….
The instructions,
( Ha! What do they know! )
Say to use 2 part epoxy or Evo Stick “Nail & Seal”
… I can’t find any current Evo-stick product called,
“Nail & Seal” Does it have a new name
Or do they just nor make it any more? 😕

[@selkiemaine]

The problem is that construction adhesive, which is what you have there, relies solely on a mechanical bond, and strongly prefers fairly rigid materials to join. The actual adhesive isn't particularly strong, and it relies on a large contact area to maintain strength. If you can bend up one corner, you can overcome the adhesive one tiny spot at a time. I suggest looking for adhesives that contain solvents for the plastic in question, so that you can obtain a chemical bond, or adhesives that are known for their remarkable mechanical bonds. Here in the States, we have a glue called "plastic surgery" - it's one of 2 products by a company called "Surehold" that combine CA glue and an aggressive solvent. It will bond most plastics. I would think there are equivalent glues in the UK. I would also suggest sanding she surfaces with fairly course sandpaper and trying epoxy. That works on blow-molded DF65 hulls when they crack. Best wishes with this!

[@mustavakybab9890]

From the manufactures......... I use and recommend a good two part epoxy for fitting all the hull parts except the battery tray which is done with Velcro. Fixing the deck to the hull used to be done with Evo-Stick Nail & Seal which has now been updated to Evo-Stick Strong Stuff, available in white or clear, however another excellent one is Soudal FixAll Crystal which I first used on the Ghost model and works very well.

[@alantownsend2353]

+1 for Soudal FixAll Crystal. I used 15 minute epoxy to fix the deck to the hull and Soudal FixAll Crystal to fill in and seal the gaps. My Club500 is water tight.