UL FR-363

Fire Rated

UL FR-363 is an intumescent two-component, high-performance elastomeric polyurea/polyurethane spray system with exceptional flame-retardant properties. Designed to retard flame spread during fire events, it is a 100% solids, VOC-free product with a user-friendly formulation and built-in activator for quick cure times.

Technical Data

Application Equipment: High-pressure plural component spray equipment with a 1:1 volume ratio and a minimum fluid pressure of 2,000 psi. Equipment must include material heat control, and filters must be removed from the B-side before spraying.
Mix Ratio: 1:1 by volume
Gel Time: 5-10 seconds

Physical Properties

Density: 69 ± 1 lbs./ft³ Elongation: 30-35% (ASTM D638)
Flame Spread Index: Class 1, 20.27 @ 125 mils (ASTM E162)
Hardness: 69 Shore D (ASTM D2240)
Optical Smoke Density: Flaming: 508; Non-Flaming: 350 (ASTM E662)
Taber Abrasion: 68.6 mg loss/1000 cycles (ASTM D4060)
Tear Strength: 550-600 pli (ASTM D624)
Tensile Strength: 1,800-2,050 psi (ASTM D638)
DMA Test: Storage Modulus, E” Tg: 32.2°C (ASTM D1640)

Key Certifications

BS 476 (Part 7): Classification of the surface spread of flame: Class 1ASTM E162: Surface Flammability of Materials using Radiant Heat Energy

Recommended Applications

Ideal for applications requiring exceptional flame retardancy and intumescent protection, such as industrial or commercial settings with high fire safety standards.