MAT-40 is a durable waterproofing tile and metal roofing underlayment consisting of high-strength, dimensionally stable polyester, in combination with fiberglass scrim. It is coated with a specially formulated SBR polymer modified adhesive applied to the roll's bottom surface. A split release film, treated with silicone, is applied to the adhesive surface to facilitate application. Top surface is composed of polyester fabric. A 2-inch selvedge edge is applied to the top surface in order to create a waterproof seal at side laps. MAT-40 can be applied in conditions where roof temperatures exceed 260°F (126.7°C).

Features:

• Monolithic coating and saturating process, Not laminated or dual-compound. This means 100% waterproofing performance and ease of application.
• Resists punctures and tears.
• Self-sealing around nails.
• Modifier is 100% SBR.
• Excellent surface for polyurethane foam adhesive.
• Retains roof-loaded tiles with no degradation of waterproofing properties of the product.
• No abrasive surface to contact with metal roof panels.
• Can be left exposed to weather for 120 days without deterioration or substantial physical property changes.
• Polyester fabric will not rot or decay.
• Economical to use.