Best Resin Types for Underwater Pool Repair

← Back to How do you apply resin to a pool?

Which Resin Type is Best for Underwater Pool Repair?

Choosing the right resin is crucial for effective and durable underwater pool repairs. The ideal solution provides a waterproof bond and structural strength, ensuring repairs stand up to continual water pressure and exposure.

Polyester vs Epoxy Resin: What Works Best?

For underwater pool repairs, both polyester and epoxy resins—especially when combined with fibreglass matting—offer robust, waterproof results. Polyester resin, such as that included in the Resin Fibreglass Repair Kit, is commonly used for pool surfaces due to its strength and ease of application. Epoxy resins, on the other hand, offer higher adhesion and structural performance, making them a solid choice for more demanding repairs, particularly where superior mechanical strength and impact resistance are required.

How to Achieve a Lasting Repair

To ensure your repair endures underwater conditions, always start by thoroughly cleaning and preparing the area for maximum resin adhesion. Apply the chosen resin together with a fibreglass reinforcement mat for maximum durability. Mixing and applying the resin correctly—usually at room temperature and according to the supplied instructions—ensures a proper bond. Using appropriate application tools, such as resin-specific rollers, helps achieve an even coat and smooth finish, critical in pool settings.

When This Matters

Selecting the right resin type is especially important for repairs below the waterline, high-traffic areas, or sections subject to heavy water pressure. The correct combination of resin and reinforcement minimises the risk of leaks and increases the longevity of your pool.

Related guides

Whether you opt for a polyester or epoxy system, matching your resin choice to the repair’s requirements is key. For more tips and an in-depth look at application, see our main guide on how to apply resin to a pool.