---
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: "KSh18516"
currency: KES
in_stock: true
reviews_count: 10
category: "Shurtape"
url: https://www.desertcart.co.ke/products/60930045-shurtape-sf-686-ul-shurmastic-butyl-foil-indoor-outdoor-hvac
store_origin: KE
region: Kenya
---

# 23.8 PSI tensile strength -20 to 200°F service range 17 mil thickness for durability 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:** KSh18516
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it like a pro — the tape that outlasts the rest!

## 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?** KSh18516 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/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

- • **Paintable Finish:** Customizable silver foil surface blends seamlessly with your project aesthetics
- • **Unmatched Durability:** 17 mil thick foil backing resists wear and tear indoors and out
- • **Water-Resistant Grip:** Instant adhesion locks out moisture for long-lasting duct integrity
- • **Certified Airtight Seal:** UL 181B-FX Listed for guaranteed HVAC compliance and peace of mind
- • **Extreme Temperature Resilience:** Performs flawlessly from freezing -20°F to scorching 200°F

## Overview

Shurtape SF 686 UL ShurMASTIC is a premium butyl foil HVAC tape engineered for superior airtight and moisture-resistant sealing. With a robust 17 mil thickness, 23.8 PSI tensile strength, and UL 181B-FX certification, it excels in both indoor and outdoor applications across a wide temperature range (-20°F to 200°F). Its paintable, water-resistant surface ensures professional-grade finishes and lasting performance on metal, rubber, and duct materials.

## 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.

Review: Excellent and thick - Excellent and thick, the backing through me off a bit, that is a PITA, but otherwise great tape
Review: Best duct tape ever - This is the real duct tape with the black butyl layer that molds around little cracks, dents or screws. It may be pricey, but I used this stuff 10 years ago and that's the only stuff that still held when I redid my ducts this year, all the other silver tape or paste was dried out, broken, cracked you name it.....it may be a bit more expensive, but it lasts, it works and you only need one strip around every seal you want to make. Easy to handle as well....so totally worth it...

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01M6ZV9BA |
| Best Sellers Rank | #36,510 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #49 in Butyl Tape |
| Brand | Shurtape |
| Color | Silver Printed |
| Compatible Material | Metal, Rubber |
| Date First Available | October 21, 2016 |
| Global Trade Identification Number | 00040074020504 |
| Item Resistance | water_resistant |
| Item Thickness | 0.02 Inches |
| Item Weight | 2.82 pounds |
| Item model number | 111163 |
| Manufacturer | Shurtape Technologies |
| Material | Aluminum |
| Number of Items | 1 |
| Product Dimensions | 3"W x 0.02"Th |
| Recommended Uses For Product | Indoor, Outdoor |
| Size | One Size |
| Special Feature | Water Resistant |
| Surface Recommendation | Metal |
| Tensile Strength | 23.8 Pounds Per Square Inch |
| UPC | 040074020504 |
| Unit Count | 1 Count |
| Water Resistance Level | Water Resistant |

## 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

### ⭐⭐⭐⭐⭐ Excellent and thick
*by R***5 on October 31, 2025*

Excellent and thick, the backing through me off a bit, that is a PITA, but otherwise great tape

### ⭐⭐⭐⭐⭐ Best duct tape ever
*by D***L on April 5, 2021*

This is the real duct tape with the black butyl layer that molds around little cracks, dents or screws. It may be pricey, but I used this stuff 10 years ago and that's the only stuff that still held when I redid my ducts this year, all the other silver tape or paste was dried out, broken, cracked you name it.....it may be a bit more expensive, but it lasts, it works and you only need one strip around every seal you want to make. Easy to handle as well....so totally worth it...

### ⭐⭐⭐⭐⭐ Good sealing tape
*by T***P on February 17, 2026*

Good sticky stuff! Difficult and frustrating to remove the paper backing, like all of these kinds of tapes. The rubber/foil can be molded/squeezed around a joint by hand after it has been applied for a good tight seal. I would not recommend for exhaust duct but for air it is perfect.

## 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 Kenya*
*Store origin: KE*
*Last updated: 2026-03-15*