Marlig Industries Fix-A-Leak concentrated pool, spa & hot tub leak sealer — 32 oz, fast 24–48 hr cure

Fix-A-Leak by Marlig is a 32 oz concentrated sealing liquid that finds and seals small leaks in pools, spas, and hot tubs while the pump circulates water.

When a pool or spa loses water, finding and repairing the leak can be time-consuming and expensive. Marlig's Fix-A-Leak is formulated to travel with circulating water, settle at leak sites, and form a barrier that helps slow or stop minor leaks without draining the system. It is intended for use in operational systems and works best on hairline cracks, pinhole leaks in plumbing, and small openings around fittings.

How do I apply Fix-A-Leak to my pool or spa?

Apply Fix-A-Leak with the circulation pump running so the product moves toward the leak. Add it slowly through the skimmer or directly in front of another suction intake to ensure distribution through the system.

• Add product with pump running via skimmer or suction intake.
• Adjust suction toward main drain or use a vacuum in deepest area if needed.
• Stir product back into suspension every 4–6 hours (pool broom or cleaner).
• Allow 24–48 hours for the repair to cure before resuming normal filtration settings.

Will Fix-A-Leak harm my filter, cartridges, or DE elements?

Fix-A-Leak is heavy and will sink, so unused product can collect in filters. Follow manufacturer instructions for filter maintenance to avoid clogging or damage and rinse or backwash filters as required.

• Sand filters: set valve to filter, then backwash to remove unused product.
• Cartridge/DE filters: remove and rinse elements; do not let cartridges or DE elements dry before cleaning.
• Inspect and clean filter components after cure time to prevent buildup.

What types of leaks can this product fix and when does it work best?

Fix-A-Leak is designed for minor leaks such as pinholes, small cracks, and small plumbing leaks that are accessible by circulating water. It is most effective when the pump is running so the product reaches the leaking area and when used on minor, localized leaks rather than major structural failures.

• Effective on small tile grout cracks, return fittings, and hairline shell cracks.
• Works for small suction-line leaks if product is directed toward the leak.
• Not recommended for major structural damage or large ruptures—consult a professional.

How long does it take to see results and what follow-up is needed?

Allow 24–48 hours of continuous circulation for the product to settle and cure at the leak site; some leaks may require monitoring and repeat treatment. During treatment, periodically stir settled product back into suspension and inspect filter systems after completion.

• Monitor water level during the 24–48 hour cure window to check progress.
• Stir product every 4–6 hours while circulating to keep it mobile.
• After cure time, resume normal filtration and perform filter cleaning or backwash as needed.

Who is this for: Fix-A-Leak by Marlig is intended for pool, spa, and hot tub owners or service technicians who need a practical, in-place solution for small leaks without draining the water. It’s a useful option for routine maintenance crews, homeowners managing minor shell or plumbing leaks, and operators who want a temporary or corrective measure before scheduling more extensive repairs.