3M Fire Barrier Water Tight Sealant 1003 SL

3M™ Fire Barrier Water Tight Sealant 1003 SL is a self-leveling silicone firestop ideal for horizontal surfaces, providing up to 3-hour fire protection. It resists fire, smoke, and moisture while minimizing noise transfer. Tested to ASTM and UL standards, it meets stringent safety codes, including IBC and LEED® VOC requirements. This durable, neutral-cure sealant is easy to apply, re-enterable, and repairable, offering excellent adhesion and weather resistance. Key Features: Certified Fire Protection: Up to 3-hour firestop tested per ASTM E 814 (UL 1479) and CAN/ULC S115. Moisture Resistance: Meets UL Water Leakage Test, W Rating - Class 1. Noise Control: Reduces sound transfer with an STC rating of 56 in compliant assemblies. Easy Application: Self-leveling formula requires no mixing or tooling. Flexible and Durable: Maintains performance in dynamic and static joints. Recommended Applications: Dynamic and static construction joints Curtain wall and perimeter fire barriers Firestop bl