Selleys MarineFlex

This, is a top product (adhesive/filler that cures under water) – I bought this February 2021. It's a brilliant product. After two unsuccessful attempts to properly seal my swimming pool Skimmer Box, I resorted to purchasing Selleys Marine Flex. For under $20 it was well worth the spend! I had two gaskets that sat on two smooth plastic faces (one inside the pool and the other [on the Skimmer Box] on the outside wall of the pool). There is massive water flow through this "Skimmer Box Gate". I smeared all sides (both sides of the gasket and, the sides of the Skimmer Box and the back-plate).

The product is easily workable (it's cleaned up with Mineral Turpentine). I used disposable gloves so as to keep myself clean.

As soon as I began to tighten the stainless steel screws I could "feel" the gaps had all closed and excess Selleys Marine Flex began to ooze out of the joint. I ran my index finger over the surfeit to smooth it off. The few bits of product on the sides of the pool I cleaned off easily with a turps-soaked rag. The result? Perfect seal.

Now here's the good part. This product cures underwater faster than if the surfaces are dry. Therefore, as soon as the gaskets were fitted, I turned on the hose and topped up the pool. As soon as the water hit the skinning product, it noticeably hardened - quite quickly. I was very impressed.

NOTE: if not cured under water it takes 24 hours per 1 mm of product to "cure". Nevertheless, the waterproof seal stays intact (providing that there is low or little water pressure on it). A 10 Year guarantee brings confidence. Highly recommended for any job where you need an adhesive and, a gap filler at the same time.