--- product_id: 91245145 title: "MFM Ultra HT Wind & Water Seal Underlayment (1)" brand: "mfm toys" price: "S$876" currency: SGD in_stock: true url: https://www.desertcart.sg/products/91245145-mfm-ultra-ht-wind-and-water-seal-underlayment-1 store_origin: SG region: Singapore --- # Seals out water to prevent leaks Withstands up to 250°F high temps Non-slip polymer surface for safe footing MFM Ultra HT Wind & Water Seal Underlayment (1) **Brand:** mfm toys **Price:** S$876 **Availability:** ✅ In Stock ## Summary > 🏠 Seal the deal with MFM Ultra HT – where durability meets peace of mind! ## Quick Answers - **What is this?** MFM Ultra HT Wind & Water Seal Underlayment (1) by mfm toys - **How much does it cost?** S$876 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/91245145-mfm-ultra-ht-wind-and-water-seal-underlayment-1) ## Best For - mfm toys enthusiasts ## Why This Product - Trusted mfm toys brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Longevity:** Backed by a 10-year limited warranty for peace of mind on your roofing investment. - • **Flexible Expansion:** High elongation design adapts to roof movement, preventing cracks and damage. - • **Heat-Resistant Shield:** Rated for extreme temperatures up to 250°F, ensuring durability under intense heat. - • **Secure Footing Surface:** Non-slip polymer film provides excellent traction, keeping installers safe and confident. - • **Ultimate Waterproof Barrier:** Self-adhering membrane seals around fasteners to block water infiltration and ice dam damage. ## Overview The MFM Ultra HT Wind & Water Seal Underlayment is a premium 45-mil thick, self-adhering waterproof membrane designed for roofing applications. Engineered to withstand temperatures up to 250°F, it features a non-slip polymer surface for safe installation and a flexible, high-elongation film that accommodates roof expansion. Ideal for use under asphalt shingles and metal roofs, it seals around fasteners to prevent water damage from ice dams and wind-driven rain. Backed by a 10-year limited warranty, it offers reliable secondary water resistance and protection. ## Description The MFM Ultra HT Wind & Water Seal Underlayment is a 45-mill, self-adhering, waterproofing underlayment composed of a white, non-slip, cross-laminated polymer film. This Premium Self-Adhering Waterproofing Protection Underlayment features a film laminated to a high-temperature rubberized asphalt adhesive with a paper backing that easily tears off before installation. Ultra HT is engineered for use under asphalt shingles and metal roofing systems. The waterproof shingle underlayment can also be used in valleys, ridges, around chimneys, at eaves for protection against ice damns and wind-driven rain, or as a whole roof covering for secondary water resistance. MFM's Ultra HT Wind & Water Seal bonds to the substrate and seals around fasteners to limit the damage caused by water penetration or leaks. This self-sealing roof underlayment must be covered within 90 days after application. MFM backs The Ultra HT Wind & Water Seal Underlayment with a 10-year limited warranty. ## Features - Rated for High Temperature applications up to 250 degrees Fahrenheit - Must be installed at a temperature >50 degrees Fahrenheit - Non-slip polymer surface for excellent foot traction - High elongation and flexible to accommodate expansion and contraction - Seals out water to prevent damage ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B07C5G3J9Z | | Best Sellers Rank | #1,461,805 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #469 in Flooring Underlayments | | Brand Name | MFM TOYS | | Color | White | | Customer Reviews | 5.0 5.0 out of 5 stars (1) 5.0 out of 5 stars | | Item Thickness | 45 mils | | Item Weight | 55 pounds | | Manufacturer | MFM | | Manufacturer Part Number | 48268 | | Material Type | Polymer | | Number Of Packs | 1 | | Recommended Uses For Product | Waterproofing underlayment for roofing, protection against ice dams and wind-driven rain | | Unit Count | 1 Count | | Upc | 725799482683 | ## Product Details - **Brand:** MFM TOYS - **Item Thickness:** 45 Mils - **Material:** Polymer - **Recommended Uses For Product:** Waterproofing underlayment for roofing, protection against ice dams and wind-driven rain - **UPC:** 725799482683 ## Images ![MFM Ultra HT Wind & Water Seal Underlayment (1) - Image 1](https://m.media-amazon.com/images/I/61j-zoyYQbL.jpg) ## Available Options This product comes in different **Item Package Quantity** options. ## Frequently Bought Together - MFM Ultra HT Wind & Water Seal Underlayment (1) - POWERTEC 12" Long Handle J Roller, 1-1/2 Inch Diameter, 3 Inch Wide, Laminate & Veneer Rubber Roller Tool for Edge Banding, Wall Coverings, 1PK (71010) - ZIP System Huber Stretch Tape | Self-Adhesive Flexible Flashing for Doors-Windows (6" x 75') --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/91245145-mfm-ultra-ht-wind-and-water-seal-underlayment-1](https://www.desertcart.sg/products/91245145-mfm-ultra-ht-wind-and-water-seal-underlayment-1) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-09-29*