---
product_id: 406162274
title: "Platinum HT-B Self-Adhering Roofing Underlayment, 41 mil, High-Temp Ice & Water Shield, 100% Butyl, Nail Sealable, UV Resistant, ASTM Certified, Lifetime Warranty (36\" x 67')"
brand: "ft synthetics"
price: "₱57297"
currency: PHP
in_stock: true
reviews_count: 8
category: "Ft Synthetics"
url: https://www.desertcart.ph/products/406162274-platinum-ht-b-self-adhering-roofing-underlayment-41-mil-high
store_origin: PH
region: Philippines
---

# 41 mil high-temp durability 180-day UV resistance 100% butyl adhesive for ultimate bond Platinum HT-B Self-Adhering Roofing Underlayment, 41 mil, High-Temp Ice & Water Shield, 100% Butyl, Nail Sealable, UV Resistant, ASTM Certified, Lifetime Warranty (36" x 67')

**Brand:** ft synthetics
**Price:** ₱57297
**Availability:** ✅ In Stock

## Summary

> 🏆 Elevate your roofing game with the ultimate high-temp shield!

## Quick Answers

- **What is this?** Platinum HT-B Self-Adhering Roofing Underlayment, 41 mil, High-Temp Ice & Water Shield, 100% Butyl, Nail Sealable, UV Resistant, ASTM Certified, Lifetime Warranty (36" x 67') by ft synthetics
- **How much does it cost?** ₱57297 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/406162274-platinum-ht-b-self-adhering-roofing-underlayment-41-mil-high)

## Best For

- ft synthetics enthusiasts

## Why This Product

- Trusted ft synthetics brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Limited lifetime warranty backed by ASTM certification for peace of mind
- • **Anti-Slip Safety:** Patented Gripsot technology keeps you steady on any slope, rain or shine
- • **Effortless Installation:** Split release silicone liner and nail sealable design speed up your project
- • **Superior Waterproof Seal:** 100% butyl adhesive ensures watertight protection under any roofing material
- • **Unmatched Heat Resilience:** Withstands extreme temps up to 265°F for year-round reliability

## Overview

The Platinum HT-B Self-Adhering Roofing Underlayment is a 41 mil thick, high-temperature waterproof membrane featuring 100% butyl adhesive for superior bonding to plywood or OSB decks. Compatible with various roofing materials, it offers a patented anti-slip surface, nail sealability exceeding ASTM D1970 standards, 180-day UV resistance, and a limited lifetime warranty, making it the professional’s choice for durable, reliable secondary ice and water protection.

## Description

The FT Synthetics Platinum HT Self-Adhering Underlayment is an all-new, updated underlayment from the original FT Synthetics HTSA Platinum HT Self-Adhering Underlayment. Its upgraded features include it being a high-temperature self-adhered waterproofing membrane that features a black butyl rubber adhesive that is designed to be used as a secondary ice and water protection for steep slope roofing applications. It can be used under most roofing materials such as residential or commercial metal, primed cedar shakes, mechanically attached concrete, asphalt shingle, or composite shingles. Combined with Gripsot technology, the underlayment has a patented anti-slip walking surface with high-temperature black butyl adhesive backing that allows for both low temperature (down to 32 degrees Fahrenheit) and rising deck adhesion and high-temperature stability (up to 265 degrees Fahrenheit). Backed by its limited lifetime warranty, the FT Synthetics high-temperature underlayment has a split release silicone liner for easy removal during installation.

Review: Great underlayment - Best underlayment I’ve dealt with. Not slippery when wet. Holds up to extreme weather while you wait for roofing. Sticks tenaciously to the roof deck, and itself. Used it on my personal house.
Review: Great stuff. - Just finally getting the roof structure done and this stuff is the icing on the cake. Goes down easy and will protect until I can get the standing seam on. Stuck no problems in the 45° weather we had today. Buy it!

## Features

- 100% butyl provides bond to plywood or OSB roof decks
- Compatible with low slope roofing materials such as EPDM and TPO
- Nail sealable (meets and exceeds ASTM D1970)
- Watertight laps
- Shelf life of 18+ months
- Split release silicone liner
- 180 day UV resistance & Limited Lifetime Warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09JQCCPML |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #280,330 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #103 in Flooring Underlayments |
| Color | Blue |
| Customer Reviews | 4.3 4.3 out of 5 stars (22) |
| Date First Available | October 18, 2021 |
| Item Package Quantity | 1 |
| Item Weight | 40 pounds |
| Item model number | 963000 |
| Manufacturer | FT Synthetics |
| Part Number | FTHTBSA |
| Product Dimensions | 7 x 7 x 48 inches |
| Shape | Roll |
| Thickness | 41 Millimeters |

## Images

![Platinum HT-B Self-Adhering Roofing Underlayment, 41 mil, High-Temp Ice & Water Shield, 100% Butyl, Nail Sealable, UV Resistant, ASTM Certified, Lifetime Warranty (36" x 67') - Image 1](https://m.media-amazon.com/images/I/61XjdMjRDUL.jpg)
![Platinum HT-B Self-Adhering Roofing Underlayment, 41 mil, High-Temp Ice & Water Shield, 100% Butyl, Nail Sealable, UV Resistant, ASTM Certified, Lifetime Warranty (36" x 67') - Image 2](https://m.media-amazon.com/images/I/71PeueW9cTL.jpg)
![Platinum HT-B Self-Adhering Roofing Underlayment, 41 mil, High-Temp Ice & Water Shield, 100% Butyl, Nail Sealable, UV Resistant, ASTM Certified, Lifetime Warranty (36" x 67') - Image 3](https://m.media-amazon.com/images/I/61TGiADqIvL.jpg)
![Platinum HT-B Self-Adhering Roofing Underlayment, 41 mil, High-Temp Ice & Water Shield, 100% Butyl, Nail Sealable, UV Resistant, ASTM Certified, Lifetime Warranty (36" x 67') - Image 4](https://m.media-amazon.com/images/I/61DkfHQQxRL.jpg)

## Available Options

This product comes in different **Item Package Quantity** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great underlayment
*by J***0 on December 26, 2025*

Best underlayment I’ve dealt with. Not slippery when wet. Holds up to extreme weather while you wait for roofing. Sticks tenaciously to the roof deck, and itself. Used it on my personal house.

### ⭐⭐⭐⭐⭐ Great stuff.
*by J***E on December 17, 2023*

Just finally getting the roof structure done and this stuff is the icing on the cake. Goes down easy and will protect until I can get the standing seam on. Stuck no problems in the 45° weather we had today. Buy it!

### ⭐ Buyer beware! You might not get self-adhering underlayment or your whole order
*by B***S on December 15, 2025*

I ordered two rolls but only received one in a box that was clearly sized for two. However, the shipping label only showed 40 lbs (the weight of one roll), meaning the other roll was never shipped. Also, the roll is received was NOT self-adhering. It’s a totally different product that needs to be stapled down. The sticker on the roll said it was self-adhering but the product itself was not meaning the company will confidentiality send you the wrong thing. There appears to be a quality control issue with this product and seller. The pricing and shipping were not problematic but this will be a pain to return.

## Frequently Bought Together

- FT Synthetics Platinum HT Butyl Self Adhering Underlayment (Single Roll)
- ZIP System Huber Flashing Tape | Self-Adhesive Flashing for Doors-Windows Rough Openings (3.75" x 30')

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-03-11*