What are the best ways to reinforce polypropylene outdoor pet waste bin lids?

Polypropylene outdoor pet waste bin lids often become brittle and crack over time due to weather exposure and regular use. Fortunately, several effective methods can reinforce these lids for extended durability. First, consider applying fiberglass resin and cloth to the underside of the lid, creating a strong composite layer that prevents cracking. Alternatively, install metal reinforcement brackets along the lid's stress points for structural support. For minor cracks, use a plastic epoxy or polypropylene-specific adhesive to seal and strengthen damaged areas. Adding weatherproof sealant around the edges can further protect against moisture damage and UV degradation. Some pet owners successfully line the lid interior with aluminum or plastic mesh for distributed weight support. Regular maintenance, including cleaning and UV-protectant sprays, will complement these reinforcement techniques. Always ensure proper ventilation when working with chemical products and allow sufficient curing time before returning the bin to service.