Pemko 420 Full Mortise Automatic Door Bottom with 1/2″; Drop – Mill AluminumProfessional Automatic Door Sealing SolutionThe Pemko 420 Full Mortise Automatic Door Bottom provides comprehensive environmental sealing for hollow metal doors with a maximum drop of 1/2″;. This commercial-grade aluminum door bottom features dimensions of W: 1-3/8″, H: 13/16″; and comes in a standard 36″; length. Multiple insert options including AVL – Eco-V, APKL – PemkoPrene, and ASL – Sponge Silicone provide versatile sealing performance for various applications with comprehensive certifications including BHMA, UL10C fire rating, and GREENGUARD Gold certification.Professional Features & BenefitsPrecise Dimensions: W: 1-3/8″, H: 13/16″; with 36″; standard length designed for seamless integration into hollow metal door construction.Maximum Drop Capacity: 1/2″; maximum drop provides effective floor sealing for standard door applications.Multiple Insert Options: Available with AVL – Eco-V, APKL – PemkoPrene, and ASL – Sponge Silicone inserts for customized sealing performance.Comprehensive Environmental Sealing: Effectively seals against draft, dust, moisture, insects, fumes, light, and sound infiltration for complete door perimeter protection.Durable Aluminum Construction: Mill aluminum finish provides long-lasting performance in demanding commercial door applications.Extensive Certifications: Air infiltration tested, sound tested ASTM E90, BHMA certified, smoke tested UL1784, fire rated UL10C positive pressure, cUL listed 4L10, and GREENGUARD Gold certified.Full Mortise Design: Professional installation method ensures clean appearance and optimal performance in commercial door systems.Manufacturer Warranty: 5 Year warranty coverage provides confidence in long-term performance and reliability.Technical SpecificationsANSI/BHMA: Air Infiltration Tested, Sound Tested ASTM E90, BHMA Certified, Smoke Tested UL1784, Fire Rated UL10C Positive Pressure, cUL Listed 4L10, GREENGUARD Gold CertifiedApplication: Wood or Hollow Metal DoorsCommercial/Residential: CommercialDepartment: Door HardwareFeatures: Seals to Keep Out Draft, Dust, Moisture, Insects, Fumes, Light, SoundInsert Type: AVL – Eco-V, APKL – PemkoPrene, ASL – Sponge SiliconeProduct Category: Door Trim and AccessoriesProduct Dimension: W: 1-3/8″, H: 13/16″;Product Group: Door Trim and AccessoriesProduct Length: 36″;Product Model: 20Product Subgroup: Door Bottom Sweeps and Door ShoesProduct Substrate: AluminumProduct Type: Automatic Door BottomsSubcategory: Door Bottoms & Door ShoesWarranty: 5 YearProfessional ApplicationsCommercial Office BuildingsEducational FacilitiesHealthcare InstitutionsRetail EstablishmentsIndustrial and Warehouse FacilitiesMulti-Tenant Residential PropertiesGovernment and Municipal BuildingsWhy Choose Pemko Quality?Pemko automatic door bottoms deliver professional-grade reliability with comprehensive testing including air infiltration, sound testing ASTM E90, BHMA certification, smoke testing UL1784, and fire rating UL10C positive pressure. The 5-year warranty and GREENGUARD Gold certification demonstrate Pemko’s commitment to quality and environmental responsibility. Engineered for demanding commercial applications where dependable environmental sealing performance is essential.