Sikaflex expectations, vertical surface.

[VicS]

Have used 291 successfully as an adhesive for light loads. Perhaps a bit thicker than in the photo. Perhaps it was the preparation or the thickness that led to failure. Otherwise there is a much more adhesive Sikaflex (221). May not be stocked so much as the shelf life is shorter. This will certainly do it.

If you use epoxy, thicken it with a filler - eg low density filler, and use it as an adhesive. Very strong, but so is 221.

ITYWF that Sikaflex 221 is the construction industry's equivalent of Sikaflex 291

Sikaflex 292 is a stronger adhesive. IIRC the non marine equivalent is Sikaflex 252 .

 

[Pye_End]

ITYWF that Sikaflex 221 is the construction industry's equivalent of Sikaflex 291

Sikaflex 292 is a stronger adhesive. IIRC the non marine equivalent is Sikaflex 252 .

Quite right. Knew it had an extra 2 somewhere. Checking the tube of 221 in my shed did not help after all.

 

[SiteSurfer]

Happy to report that the clear Sticks Like Sh*it from Screwfix worked a treat.
It turned out that the issue wasn't the sticking to the GRP but the Sikkaflex not sticking (at all) to the expoxied wood pads.

Anyway - a copious amount of afore mentioned sealant and 24 hours and problem gone away.