Mastic: A Protective Seal For Your Pool

Mastic is an organic glue made from the mastic tree. Because of its great flexibility, it is often used where materials are expected to flex with weather conditions. Swimming pools use Mastic as a joint compound for decks and for the coping around the edges.

Mastic: A Protective Seal For Your Pool


Swimming pools are subject to expansion and contraction thanks to the natural effects of weather conditions on the ground and in the water. As a result, Mastic flexes and stretched throughout the year. When it starts to break down, it can allow water such as rain and melting snow to seep below your pool. This can cause pressure against your shell which can lead to cracks and leaks. Some damage can cost as much as $2,700.00 to repair.

Mastic should be repaired when you see cracks and gaps, or if you see the paving around your pool rising or cracking. Also look for any signs of cracking or loosening of tiles in your pool. This indicates that water is underneath and pressing against the surface or pool shell.

Can Anyone Replace Mastic?

Mastic can be applied DIY, but keep in mind that if you do it wrong (not using enough or missing trouble spots), you may be in for more repairs and expense than you planned. If you use a pool maintenance service, make sure that such repairs are a written part of their service contract. Never just take someone’s word for it that they know how.

In Conclusion

Mastic is to a pool what a bottle cap is to a bottle; it keeps the insides in and the outsides out. It should be inspected regularly for cracks and gaps not just around the pool edge but on the deck as well. Contact us for a professional inspection.