Marlig Industries

Marlig Industries leak sealer for pools and hot tubs

Here you will find the leak sealing product supplied under the Marlig Industries name: SB-Pool Leak Sealer for Pools and Hot Tubs, article 74725, in a one litre bottle. It is a liquid treatment added to the water rather than a part that is fitted, and it is aimed at the small, hard-to-locate losses that show up as a slowly dropping water level with no visible wet patch on the plant room floor.

Water loss is one of the most frustrating problems a pool owner faces, because the cause can sit anywhere between the skimmer throat and the far end of a buried return line. Before digging up paving or draining a vessel, many owners try a sealer first, which is why a product of this kind tends to sit in the same cupboard as test strips and spare gaskets.

How a liquid leak sealer works

A sealer of this type is poured into the circulating water so that the pump and filtration system distribute it around the whole hydraulic circuit. Where water is escaping, it carries the product into the gap with it. The particles in suspension gather at the opening and build up against the edges, while water that is simply circulating normally carries the product straight past. The result is that the treatment concentrates itself at the point of loss rather than needing to be applied by hand.

Because the mechanism depends on movement of water through the defect, a sealer is best suited to:

• Hairline cracks in concrete, render and plaster shells.
• Pinholes and small splits around fittings, lights and return eyeballs.
• Weeping joints at skimmer throats, main drains and pipe unions.
• Underground pipework where the run cannot be inspected without excavation.
• Balie i spa, where plumbing is packed tightly behind the cabinet and difficult to reach.

It is not a substitute for repairing a torn liner, a failed mechanical seal on a pump or a cracked pipe that is losing water quickly. Large, obvious leaks need a physical repair.

Finding the leak before you treat it

A short diagnosis saves product and gives a much better idea of what to expect. Mark the water line with tape and record the drop over 24 hours, first with the circulation running and then with it switched off. If the level falls faster while the pump is running, pressure-side pipework and return fittings are the likely suspects. If it falls at the same rate either way, look at the shell, the skimmer and the suction side. If the level stops at a particular height, the leak is usually at or just below that point, which often means a light niche, a return fitting or a skimmer mouth.

Also rule out the simple explanations. Evaporation in hot, breezy weather, splash-out from heavy use and backwash water sent to waste all look like leaks on a tape mark. A cover will reduce evaporation significantly and makes the test far more reliable.

Using and storing the product

Dosing is based on the water volume of the pool or spa, so work out your capacity in cubic metres before ordering: length multiplied by width multiplied by average depth for a rectangular pool. Always follow the dosing and circulation instructions printed on the bottle, as they set out how the product should be added and how the filtration should be run during treatment. Keep the container closed and stored out of frost and direct sunlight, and away from chemical stocks such as chlorine and acid.

After any treatment, keep checking the water level with the tape method so you know whether the loss has actually stopped. If it has not, the evidence you have gathered will help a technician narrow down where to look.

Marlig Industries at PoolParthub.com

Here we list the Marlig Industries SB-Pool Leak Sealer in the one litre bottle, reference 74725, suitable for both swimming pools and hot tubs. It is stocked because a sealing treatment is often the quickest and least invasive first step when a vessel is losing water and the source cannot be seen.

Customers across Europe order it alongside the parts that usually accompany a leak investigation: skimmer and light gaskets, return fittings, pipe unions and O-rings. If the treatment points you towards a component that needs replacing, those parts can be found elsewhere on the site.