Mounting Bodywash/Shampoo Dispenser to fiberglass shower wall

[Santa & Pockets]

We tried silicone and foam tape, but this did not hold. Considering exploding rivets with rubber washers. Anyone do this? How thick is the fiberglass (for the correct length of rivet)? Anyone recommend against it? Alternatives? Thank you in advance for your input!

https://www.amazon.com/gp/product/B07Q8J6H67/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

https://www.amazon.com/Tri-Fold-Exploding-Aluminum-Shaveable-Sealing/dp/B07K1DT4G6/ref=pd_di_sccai_5/138-0493013-9507458?pd_rd_w=8n5oe&pf_rd_p=c9443270-b914-4430-a90b-72e3e7e784e0&pf_rd_r=ATZGVDJFRKVRFB4W39P5&pd_rd_r=43306c3f-5a82-4ff0-ae10-161b6a6726d1&pd_rd_wg=bYYRd&pd_rd_i=B07K1DT4G6&psc=1

[Bogdan]

wow that is a great idea let me know how it turns out

[THenne1713]

The BRACKET to hold the showerhead is mounted w/ screws, just push on plastic and try to find a place where it touches wood and predrill slowly, and NOT too deep? I recommend NOT on an outside wall and drill carefully, uses screws LESS than 1-inch long, TRY to put on Inside wall vs Outside? LUCK