{"id":2452,"date":"2025-08-12T06:32:15","date_gmt":"2025-08-12T06:32:15","guid":{"rendered":"https:\/\/www.t2960.com.sg\/?post_type=product-enquiry&#038;p=2452"},"modified":"2025-08-19T06:31:31","modified_gmt":"2025-08-19T06:31:31","slug":"specseal-sil-silicone-firestop-sealant-class-1-w-ratings","status":"publish","type":"product-enquiry","link":"https:\/\/www.t2960.com.sg\/zh\/product-enquiry\/specseal-sil-silicone-firestop-sealant-class-1-w-ratings\/","title":{"rendered":"SpecSeal SIL Silicone Firestop Sealant | Class 1 W Ratings"},"content":{"rendered":"<p>One-part, neutral-cure silicone firestop sealant for sealing openings in walls and floors to control the spread of fire, smoke, toxic gases, and water during fire conditions.<\/p>\n<header class=\"grid\">\n<div>\n<p class=\"lead\">Available in non-sag (SIL300) and self-leveling (SIL300SL) grades with excellent water resistance, UV\/ozone stability, and <strong>Class 1 W Ratings (UL1479)<\/strong>.<br \/>\nTested to ASTM E814 (UL1479), ASTM E1966 (UL2079), CAN\/ULC-S115 \u2014 ratings up to 4 hours in tested systems.<\/p>\n<div class=\"tags\" aria-label=\"Related keyphrases\"><span class=\"tag\">silicone firestop sealant<\/span><br \/>\n<span class=\"tag\">UL1479 firestop<\/span><br \/>\n<span class=\"tag\">UL2079 joint firestop<\/span><br \/>\n<span class=\"tag\">CAN\/ULC-S115<\/span><br \/>\n<span class=\"tag\">Class 1 W rating<\/span><br \/>\n<span class=\"tag\">neutral cure<\/span><br \/>\n<span class=\"tag\">low modulus<\/span><br \/>\n<span class=\"tag\">non-sag &amp; self-leveling<\/span><\/div>\n<\/div>\n<\/header>\n<hr \/>\n<section aria-labelledby=\"features\">\n<h2 id=\"features\">Key Features &amp; Benefits<\/h2>\n<ul>\n<li>Neutral-cure silicone; adheres to most substrates without primer<\/li>\n<li>Low modulus for dynamic joints; excellent recovery after movement<\/li>\n<li>Class 1 <strong>W Ratings (UL1479)<\/strong> for water-tight sealing where required<\/li>\n<li>Excellent water resistance, UV and ozone resistance for long service life<\/li>\n<li>Superior smoke seal and chemical resistance; suitable for polluted\/corrosive atmospheres<\/li>\n<li>Auto-bonding \u2014 new sealant adheres to cured sealant to simplify repairs<\/li>\n<li>Non-halogenated; no asbestos, no PCBs; LEED v3\/v4\/v4.1 low-emitting materials credit eligible<\/li>\n<li>Meets ASTM C920 (SIL300: Type S, Grade NS, Class 50; SIL300SL: Type S, Grade P, Class 25)<\/li>\n<\/ul>\n<\/section>\n<hr \/>\n<section aria-labelledby=\"applications\">\n<h2 id=\"applications\">Applications<\/h2>\n<ul>\n<li>Through-penetration firestop systems and joint systems<\/li>\n<li>Non-combustible penetrants; electrical\/data\/telecom cables<\/li>\n<li>Construction gaps, expansion joints, perimeter\/curtain wall safing, and top-of-wall joints<\/li>\n<li>Vertical and horizontal joints between metals, masonry, concrete, and common substrates<\/li>\n<\/ul>\n<\/section>\n<hr \/>\n<section aria-labelledby=\"specs-supplied\">\n<h2 id=\"specs-supplied\">Physical Properties \u2014 As Supplied<\/h2>\n<table>\n<thead>\n<tr>\n<th>Property<\/th>\n<th>SIL300 (Non-Sag)<\/th>\n<th>SIL300SL (Self-Leveling)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Consistency<\/th>\n<td>Trowelable<\/td>\n<td>Pourable<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Density \/ Weight per Gallon<\/th>\n<td>11.6 lb\/gal<\/td>\n<td>11.5 lb\/gal<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Solids by Weight<\/th>\n<td>100%<\/td>\n<td>85%<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Viscosity<\/th>\n<td>1,200,000 cps<\/td>\n<td>25,000 cps<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Application Temperature<\/th>\n<td>35\u00b0F (-37\u00b0C) to 140\u00b0F (60\u00b0C)<\/td>\n<td>35\u00b0F (-37\u00b0C) to 140\u00b0F (60\u00b0C)<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Storage Temperature<\/th>\n<td>\u2264 80\u00b0F (27\u00b0C)<\/td>\n<td>\u2264 80\u00b0F (27\u00b0C)<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">VOC Content<\/th>\n<td>20 g\/L<\/td>\n<td>&lt; 47 g\/L<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Shelf Life (from manufacture)<\/th>\n<td>18 months<\/td>\n<td>18 months<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Tooling Time<\/th>\n<td>25\u201330 minutes<\/td>\n<td>25\u201330 minutes<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Tack Free (ASTM C679, 77\u00b0F\/50%RH)<\/th>\n<td>3\u20134 hours<\/td>\n<td>50\u201360 minutes<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Sag\/Slump (ASTM D2202)<\/th>\n<td>0.1\u201d max<\/td>\n<td>N\/A<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Storage Warranty Period<\/th>\n<td colspan=\"2\">12 months from shipment in unopened container at \u2264 80\u00b0F (27\u00b0C)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n<hr \/>\n<section aria-labelledby=\"specs-cured\">\n<h2 id=\"specs-cured\">Physical Properties \u2014 Cured<\/h2>\n<table>\n<thead>\n<tr>\n<th>Property<\/th>\n<th>SIL300 (Non-Sag)<\/th>\n<th>SIL300SL (Self-Leveling)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Color<\/th>\n<td>Concrete (limestone)<\/td>\n<td>Gray<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Flame Spread \/ Smoke (ASTM E84)<\/th>\n<td>5 \/ 45<\/td>\n<td>5 \/ 45<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Mold &amp; Fungus (ASTM G21)<\/th>\n<td>0<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Movement Capability<\/th>\n<td>\u00b150% (ASTM C719); \u00b135% (ASTM E1399)<\/td>\n<td>\u00b150% (ASTM C719); \u00b115% (ASTM E1399)<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">In-Service Temperature<\/th>\n<td>-35\u00b0F (-37\u00b0C) to 350\u00b0F (177\u00b0C)<\/td>\n<td>-35<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>","protected":false},"featured_media":2454,"template":"","meta":{"_acf_changed":false},"brand":[],"eproducts-category":[15,9],"class_list":["post-2452","product-enquiry","type-product-enquiry","status-publish","has-post-thumbnail","hentry","eproducts-category-firestop-solutions","eproducts-category-sealants"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - 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