To seal pest entry points effectively, start by inspecting the exterior of your home to identify cracks, gaps, and holes in walls, foundations, windows, and doors. Use high-quality silicone or latex caulk to fill small cracks and gaps. For larger openings, especially around pipes and utility lines, fill them with steel wool or copper mesh before applying caulk or expanding foam. Install door sweeps on all exterior doors and ensure windows and doors are properly weatherstripped to eliminate gaps. Screen vents and chimneys with fine mesh to maintain airflow while keeping pests out. Maintain landscaping by keeping vegetation trimmed and away from the building.