Swimming Pool Floor Concrete Replacement

by Dan
(Oklahoma City)

Pool Floor Crack

If I have to replace a section (5ftx5ft) of concrete on the floor of my inground vinyl liner pool, do I need to use a special type of concrete?

Thanks for the question Dan

I can't go into much detail on how to go about repairing a concrete section, but there are a couple of things to keep in mind.

You'll want to first cut and sand the affected area, then prime it.

You can prime the substrate with 1 coat of PermaFlex. 1 gallon will cover about 240 sq ft. A cement block surface will need 2 prime coats.

The first coat will penetrate the substrate, then it cures.

You can also use a product called E-Z Joint Seal Self-Leveling Expansion Joint Sealant. This is an oxime neutral cure 100% silicone rubber expansion joint sealant.

You should allow the crack to dry. Wipe away the dust and debris.

Put a bead of caulk along the crack. You'll want to leave 1/4” space to allow the plaster to cover the caulking.

Let this dry.

Use a general pool patch or white Portland cement with white sand and water, and an acrylic cement bonding agent.

This can be found at Lowes or Home Depot.

Your mix should have the consistency of peanut butter.

A liquid rubber base and thickening activator (LRB/TAV mixture). Mix 2 parts of LRB and 1 part TAV. You'll have a mixture that can be applied in one application.

This is for information purposes only and will give you a starting point.

If you have any doubts about the repair, please contact a local pool professional that can handle your situation.

Hope this helps and have a fun and safe swimming season.

Robert