UL XP-461

Pure Polyurea

UL XP-461 is a 100% solid, two-component, high-performance aromatic pure polyurea spray elastomer system. It is designed for moisture-insensitive applications, offering exceptional adhesion properties for properly prepared substrates. UL XP-461 forms a durable skin for chemical resistance and moisture protection.

Technical Data

Application Equipment: High-pressure plural component spray equipment with 1:1 volume ratio and 2,000-2,500 psi fluid pressure capability. Equipment must include material heat control and impingement mixing capability.
Mix Ratio: 1:1 by volume
Gel Time: 2-5 seconds

Physical Properties

Elongation: 148% (ASTM D412)
Flexural Strength: 2,680 psi (ASTM D790)
Flexural Modulus: 0.055 msi (ASTM D790)
Hardness (Shore D): 63 ± 1 (ASTM D2240)
Tear Strength: 708 pli (ASTM D624)
Tensile Strength: 3,250 psi (ASTM D412)
Taber Abrasion: 19.6 mg loss/1000 cycles (ASTM D4060)
Impact Resistance: 320 in. lbs, no failure (ASTM D2794)
Safe Walking Surfaces: Dry: 0.785; Wet: 0.66 (ASTM F1637.95)
Flammability of Interior Materials: PASS (FMVSS 302)
Chip Resistance: Rating 10 (ASTM D3170)
Salt Spray: Rating 9 (ASTM B117)
Dielectric Strength: 472 V/mil (ASTM D149)
Water Vapor Transmission: 0.64 grain/hr-ft² (ASTM E96, Method B)

Key Certifications

Complies with USFDA Coatings Regulations for Incidental-Food-Contact Applications (Keller and Heckman LLP Letter of Opinion)Meets NSF/ANSI/CAN 61 (Natural Resin)

Recommended Applications

Ideal for moisture-insensitive applications requiring high adhesion, chemical resistance, and protection from moisture, such as protective coatings for industrial environments and substrates.