What to fill gap between brick coping and fiberglass pool top with

[mgall9485]

What is the recommended product to fill the gap between the brick coping and the top of a fiberglass pool?

Our pool builder filled it with concrete grout that is already cracking and falling out. I’m assuming it’s because it does not want to adhere to the fiberglass. I brought it to their attention but they just tell me it’s what they always use. I feel like it should be some sort of silicone but can’t figure out what.

 

[ajw22]

Welcome to TFP.

Post pics of the problem areas.

You will need to scrape out the grout and replace it with something like..

Sikaflex®-1A

Sikaflex-1a is a premium-grade, high-performance, moisture-cured, 1-component, polyurethane-based, non-sag elastomeric sealant. Sikaflex-1a can be used in green and damp concrete applications.

usa.sika.com

 

[uvavi8r]

^^^^This - or I used this...I went with NovaGard because they had the adhesive and gout (and the gout is colored).

NovaFlex Silicone Tile Grout

NovaFlex Silicone Tile Grout is a non-corrosive, non-flowable paste that cures to a rubber-like solid when exposed to atmospheric moisture.

novagard.com

 

[mgall9485]

Thank you both. Attached is pics of what I’m talking about

 

[duraleigh]

The cement falls out because that joint flexes throughout the seasons. It will never stay in there.

I would suggest polyurethane caulk. It is not easy to work with but will flex and look nice longer. Regular caulk is easier but will crack again much sooner.