---
product_id: 60930045
title: "Shurtape SF 686 UL ShurMASTIC Butyl Foil Indoor/Outdoor HVAC Tape, 181B-FX Listed/Printed, 3\" x 33.3 Yards, Silver, 1 Roll (111163)"
brand: "shurtape"
price: "€ 66.39"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.ie/products/60930045-shurtape-sf-686-ul-shurmastic-butyl-foil-indoor-outdoor-hvac
store_origin: IE
region: Ireland
---

# 23.8 PSI strength -20 to 200°F range 17 mil thickness Shurtape SF 686 UL ShurMASTIC Butyl Foil Indoor/Outdoor HVAC Tape, 181B-FX Listed/Printed, 3" x 33.3 Yards, Silver, 1 Roll (111163)

**Brand:** shurtape
**Price:** € 66.39
**Availability:** ✅ In Stock

## Summary

> Seal the Deal! 🔒

## Quick Answers

- **What is this?** Shurtape SF 686 UL ShurMASTIC Butyl Foil Indoor/Outdoor HVAC Tape, 181B-FX Listed/Printed, 3" x 33.3 Yards, Silver, 1 Roll (111163) by shurtape
- **How much does it cost?** € 66.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/60930045-shurtape-sf-686-ul-shurmastic-butyl-foil-indoor-outdoor-hvac)

## Best For

- shurtape enthusiasts

## Why This Product

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

## Key Features

- • **Instant Adhesion:** Experience an instant, water-resistant grip for airtight and moisture-free sealing.
- • **Superior Strength:** Boasts an impressive 23.8 pounds per square inch tensile strength for reliable sealing.
- • **Eco-Conscious Choice:** Crafted without asbestos, CFCs, or PCBs, making it a safe option for your projects.
- • **Unmatched Durability:** Engineered with a robust 17 mil thickness for long-lasting performance.
- • **Versatile Temperature Range:** Designed to perform in extreme conditions, from -20°F to 200°F.

## Overview

The ShurtapeSF 686 UL ShurMASTIC Butyl Foil HVAC Tape is a high-performance solution for both indoor and outdoor applications. With a thickness of 17 mils and a tensile strength of 23.8 PSI, this tape ensures a secure and durable seal. It operates effectively in a wide temperature range of -20 to 200 degrees Fahrenheit and is free from harmful substances like asbestos, CFCs, and PCBs. Its instant adhesion and water-resistant properties make it ideal for a variety of sealing tasks.

## Description

ShurMASTIC butyl foil HVAC tape used for airtight and moisture-free sealing of Class 1 Flex Duct, sheet metal and duct wrap vapor barriers, and is also approved for subgrade application on PVC-coated duct. A paintable, UL 181B-FX Listed and printed mastic on a roll for indoor or outdoor use, SF 686 is designed with a butyl rubber adhesive system that can withstand wide temperature variances once applied.

## Features

- Indoor/outdoor mastic foil HVAC tape - 17 mils and 23.8 pounds per square inch tensile strength
- UL 181B-FX Listed - clearly printed on the tape for quick identification
- Linered with service temperature range from -20 to 200 degrees Fahrenheit. Contains no asbestos, CFCs or PCBs
- Instant, water-resistant grip to most surfaces for airtight and moisture-free sealing
- Paintable with paint recommended for aluminum

## Product Details

- **Brand:** Shurtape
- **Color:** Silver Printed
- **Material:** Aluminum
- **Number of Items:** 1
- **Recommended Uses For Product:** Indoor, Outdoor

## Images

![Shurtape SF 686 UL ShurMASTIC Butyl Foil Indoor/Outdoor HVAC Tape, 181B-FX Listed/Printed, 3" x 33.3 Yards, Silver, 1 Roll (111163) - Image 1](https://m.media-amazon.com/images/I/81GG+wYDwxL.jpg)
![Shurtape SF 686 UL ShurMASTIC Butyl Foil Indoor/Outdoor HVAC Tape, 181B-FX Listed/Printed, 3" x 33.3 Yards, Silver, 1 Roll (111163) - Image 2](https://m.media-amazon.com/images/I/91LuC+YfxOL.jpg)
![Shurtape SF 686 UL ShurMASTIC Butyl Foil Indoor/Outdoor HVAC Tape, 181B-FX Listed/Printed, 3" x 33.3 Yards, Silver, 1 Roll (111163) - Image 3](https://m.media-amazon.com/images/I/81XRIPb0RmL.jpg)
![Shurtape SF 686 UL ShurMASTIC Butyl Foil Indoor/Outdoor HVAC Tape, 181B-FX Listed/Printed, 3" x 33.3 Yards, Silver, 1 Roll (111163) - Image 4](https://m.media-amazon.com/images/I/71PmqiygP7L.jpg)

## Questions & Answers

**Q: Is this ul rated for a dryer vent transition duct (the duct connecting from dryer to wall). max temp is 212f?**
A: Don't know about dryer duct. Is made for HVAC ductwork. May not carry the amount of heat your asking about. Does stand up to long periods of heat and a/c if under the house or in the attic.

**Q: How thick is the foil?**
A: It's not just foil. It's attached to another material that makes it fairly thick. You can't tear it with your bare hands - it has to be cut. The Amazon description might give you more information.

**Q: does the tape smell?**
A: Mild smell from the adhesive, but most ductwork is not in a living space where smell does not matter.

**Q: Want to use this tape to seal insulation around rv. Is this tape safe for the rv? Don’t want to damage the outside walls.**
A: I used it in my RV to seal air conditioning duct work and it works perfectly for that purpose.  It is very sticky and sticks like crazy wherever you put it. It is not meant to be removed but it sounds like you are putting it to a good use.  It is approved for use in a house so I assume it is safe for an RV.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great
*by S***N on July 22, 2025*

Correct width delivered. Roll lasts forever! Easy to work with

### ⭐⭐⭐⭐⭐ Heavy and wide
*by S***. on August 22, 2025*

Heavy and wide. Just what I wanted. I am using the mastic / foil tape to air seal the ducts on my furnace. Slicking it down with a plastic spreader makes a big difference in how tightly it seals.

### ⭐⭐⭐⭐⭐ Very sticky
*by C***N on May 26, 2025*

Very sticky HVAC tape that sealed flexable duct to rigid duct. HVAC company wanted to charge me 5x more than this cost.

## Frequently Bought Together

- Shurtape SF 686 UL ShurMASTIC Butyl Foil Indoor/Outdoor HVAC Tape, 181B-FX Listed/Printed, 3" x 33.3 Yards, Silver, 1 Roll (111163)
- Shurtape DC 181 UL 181B-FX Listed/Printed Film Tape, 48mm x 110m, Metalized Print, 1 Roll (164686)
- Red Devil 0841DX F-Seal 181 Duct Seal, Fiber Reinforced Water Based Duct Sealant, 1 Gallon, Gray, Made in USA

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-12*