AG510 Fire Retardant Sealant, Intumescent Acrylic Caulk, 4-Hour Rated, 10.5 fl oz

Adhesive Guru AG510 Fire Retardant Sealant is a water-based, acrylic emulsion firestop caulk developed for passive fire protection in construction joints and penetrations. Ideal for sealing precast panel joints, masonry control joints, and metal duct or pipe penetrations, it helps prevent the spread of fire, smoke, and gases through interior voids. This intumescent fire sealant expands when exposed to high temperatures, delivering up to 4 hours of fire resistance per EN 1366-4. It forms a flexible, durable seal with excellent adhesion to concrete, masonry, and metal surfaces. AG510 is halogen-free, asbestos-free, and fiber-free, making it a safe choice for indoor use. Its non-sag, water-based formula applies easily with a standard caulking gun and can be cleaned with water before curing. Surface dries within 15-60 minutes and fully cures in 24 hours-no special handling required. AG510 offers effective fire protection support with lasting durability.

• Intumescent formula expands with heat to seal joints and block smoke and gas transmission
• Ideal for precast panels, masonry joints, ducts, and pipe penetrations
• Flexible and non-sag application for vertical and horizontal joints
• Strong adhesion to concrete, masonry, and metal surfaces. Not recommended for use on glass, floor joints, oily surfaces, areas with continuous water exposure, or surfaces subject to constant load and abrasion.
• Water-based acrylic formula allows easy application and cleanup
• Halogen-free, asbestos-free, and fiber-free for safe indoor use
• The application temperature should be between 40°F and 95°F
• Easy to use with a standard caulking gun; no special tools or handling needed
• How to Use: 1) Wear protective gloves, clothing, eye protection, and face protection. Ensure the surface is clean, dry, and free of dust, oil, grease, or loose materials. Remove old sealant or debris. 2) If you want clean edges, apply masking tape along both sides of the joint and remove it right after smoothing the sealant. 3) Cut the cartridge nozzle at an angle to the bead size you need. Puncture the seal inside if necessary. Load the cartridge into a standard caulking gun. 4) Apply a steady, continuous bead of AG510 into the joint or gap. Fill it completely for best results. 5) Within 5 minutes, smooth the sealant with a gloved finger or spatula to shape it and improve adhesion. 6) The surface will skin over in 15–60 minutes. Let it cure fully for 24 hours (longer if it’s cool or humid). 7) Clean tools and any uncured sealant with water. Once cured, removal may need mechanical methods.
• Fire Resistance Features: Fire resistance according to EN 1366-3:2009 and EN 1366-4:2006 + A1:2010. 180 minutes Fire resistance without using any backfilling material according to EN 1366-4 under certain conditions. Fire resistance according to ASTM E 814-13A (2017): Standard Test Method for Penetration Firestop Systems.