What type of glue is a two-part catalyzed glue that is waterproof and fills voids?

The two-part catalyzed glue that is waterproof and can fill voids is epoxy. Epoxy consists of a resin and a hardener that, when mixed together, initiate a chemical reaction that cures the adhesive into a strong, durable bond. This characteristic makes it particularly effective for applications requiring waterproofing, as its cured form is resistant to moisture, making it suitable for both indoor and outdoor projects.

Epoxy's versatility allows it to fill gaps and voids, providing added support in joint areas where other types of glue might fail. This property makes epoxy an ideal choice in cabinet making and finish carpentry, especially in situations where a robust, long-lasting adhesive is necessary to ensure structural integrity.

In contrast, hide glue, contact glue, and polyurethane adhesives do not share the same properties. Hide glue is typically water-soluble and not as waterproof as epoxy, making it less ideal for outdoor applications. Contact glue is designed for bonding large surfaces instantly and does not fill voids effectively. Polyurethane glue is moisture-activated and has some gap-filling capability; however, it does not achieve the same level of structural strength and durability as epoxy.