{"product_id":"malarkey-406-secure-start-ht-high-temperature-underlayment-mal406usgt2","title":"Malarkey 406 Secure Start HT High Temperature Underlayment","description":"\u003cp\u003eThe Malarkey 406 Secure Start HT High Temperature Underlayment is a ice \u0026amp; water underlayment for jobs that require Malarkey model\/MPN 406SGT1 in the RL sell unit. 406 Secure Start HT is a self-adhering, high temperature underlayment suitable for use as a waterproof underlayment in steep slope roofing applications with metal roofing, asphalt shingles, wood shakes\/shingles, and mechanically-fastened roof tile.\u003c\/p\u003e\u003ch3\u003eKey Specs\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Malarkey\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel \/ MPN:\u003c\/strong\u003e 406SGT1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e MAL406USGT2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSell unit:\u003c\/strong\u003e RL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Ice \u0026amp; Water Underlayment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize \/ color:\u003c\/strong\u003e 2 Square\/Roll\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Residential Roofing | Residential Roofing\/Underlayment | Residential Roofing\/Underlayment\/Ice \u0026amp; Water Underlayment | Underlayment | Underlayment\/Ice \u0026amp; Water Underlayment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage \/ unit:\u003c\/strong\u003e 2 squares (200 sq ft) per roll\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSecure Start HT (high temperature) is a self-adhering underlayment with superior thermal stability and adhesion properties, making it the right choice for complete deck coverage under metal\u003c\/li\u003e\n\u003cli\u003eMalarkey offers two ice \u0026amp; water barriers tailored to asphalt shingle roofs. Secure Start HT was designed for metal roof applications but also delivers superior performance under asphalt shingles\u003c\/li\u003e\n\u003cli\u003eGiven its superior performance, it is recommended in more extreme climates, areas with higher elevation, high winds, and wind-driven rain, and those more prone to ice damming.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCoverage \u0026amp; How Much You Need\u003c\/h3\u003e\u003cp\u003eThis item is listed as 2 squares (200 sq ft) per roll. Use the project takeoff, manufacturer installation instructions, and expected waste\/overlap to confirm the order quantity.\u003c\/p\u003e\u003ch3\u003eCompatibility \/ Fitment\u003c\/h3\u003e\u003cp\u003eUse this item only when the brand, model\/MPN, size\/color, sell unit, and system type match the project specification. Do not substitute it for a different ice \u0026amp; water underlayment, pack size, color, membrane\/system family, or installation condition without checking the manufacturer instructions.\u003c\/p\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003ch4\u003eWhat exactly am I ordering?\u003c\/h4\u003e\u003cp\u003eMalarkey 406 Secure Start HT High Temperature Underlayment, sold as RL, with SKU MAL406USGT2 and manufacturer model\/MPN 406SGT1.\u003c\/p\u003e\u003ch4\u003eWhat model or part number should I match?\u003c\/h4\u003e\u003cp\u003eMatch model\/MPN 406SGT1 and confirm the brand is Malarkey. If the job spec lists a different model, size, color, or system family, hold for review.\u003c\/p\u003e\u003ch4\u003eWhat unit is the price based on?\u003c\/h4\u003e\u003cp\u003eThis listing is built around the RL sell unit. Confirm the unit before comparing price, quantity, or coverage.\u003c\/p\u003e\u003ch4\u003eHow do I estimate quantity?\u003c\/h4\u003e\u003cp\u003eUse 2 squares (200 sq ft) per roll, then add waste or overlap per the manufacturer instructions and the project design.\u003c\/p\u003e\u003ch4\u003eWhat should be checked before purchase?\u003c\/h4\u003e\u003cp\u003eConfirm the model\/MPN, sell unit, size\/color, jobsite condition, compatible system components, and any manufacturer installation limits before approving the order.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eRoofing and exterior-envelope work can involve fall hazards, weather exposure, fumes, adhesives, and system-specific installation requirements; follow the manufacturer instructions, OSHA-safe work practices, and local code or use a qualified contractor.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eProduct Expert Notes\u003c\/h3\u003e\u003cp\u003eChoose this item when Malarkey model\/MPN 406SGT1, SKU MAL406USGT2, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.\u003c\/p\u003e","brand":"Malarkey","offers":[{"title":"Default Title","offer_id":53114794443119,"sku":"MAL406USGT2","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/AlternateImage1_MAL406USGT2_1.jpg?v=1781510724","url":"https:\/\/superarbor.io\/products\/malarkey-406-secure-start-ht-high-temperature-underlayment-mal406usgt2","provider":"Super Arbor","version":"1.0","type":"link"}