---
product_id: 24733095
title: "Duct Seal 81881 Duct Seal Compound, Easy Application, HVAC, 5 lb"
brand: "rectorseal"
price: "319.76 DT"
currency: TND
in_stock: true
reviews_count: 8
url: https://www.desertcart.tn/products/24733095-duct-seal-81881-duct-seal-compound-easy-application-hvac-5
store_origin: TN
region: Tunisia
---

# Water & air tight seal Works 25°F-120°F 5 lbs reusable putty Duct Seal 81881 Duct Seal Compound, Easy Application, HVAC, 5 lb

**Brand:** rectorseal
**Price:** 319.76 DT
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal smarter, not harder — the tradesman’s secret weapon!

## Quick Answers

- **What is this?** Duct Seal 81881 Duct Seal Compound, Easy Application, HVAC, 5 lb by rectorseal
- **How much does it cost?** 319.76 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/24733095-duct-seal-81881-duct-seal-compound-easy-application-hvac-5)

## Best For

- rectorseal enthusiasts

## Why This Product

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

## Key Features

- • **Safe & Smart:** Non-toxic, asbestos-free formula that won’t corrode metals or harm skin—trusted by tradesmen.
- • **Seal Like a Pro:** Creates a durable, waterproof, and airtight barrier that resists water, alcohol, and mild acids.
- • **Mold It Your Way:** Soft, hand-moldable putty adapts to any shape for a perfect fit every time.
- • **Paint-Ready Finish:** Can be painted immediately after application without bleeding through for a clean, professional look.
- • **Versatile Application:** Ideal for HVAC, plumbing, electrical conduit ends, and general home sealing needs.

## Overview

RectorSeal 81881 is a 5-pound gray duct seal compound designed for professional-grade sealing. This soft, non-toxic putty adheres to most clean, dry surfaces and works effectively between 25°F and 120°F. It forms a waterproof, airtight seal resistant to water, alcohol, and mild acids, while being safe on plastics and metals. Reusable and paintable immediately after application, it’s a versatile solution trusted across HVAC, plumbing, electrical, and construction trades.

## Description

Rectorseal81881 5-Pound Duct Seal Compound,grey

## Features

- APPLICATION: Rectorseal duct seal compound is a gray, soft, non-toxic, putty-type compound that adheres to most clean dry surfaces; Duct Seal can be hand-molded to any form and resued if necessary
- EASY TO USE: The putty like duct sealant compound is easy to use and can be hand applied from 25â°f to 120â°f; can be applied to electrical conduit ends and boxes, flashings, and service mast entries
- SUPERIOR FORMULA: Duct seal creates an air and water tight seal; resistant to water, alcohol, and mild acids and bases; duct seal compound is asbestos-free; it will not damage plastic materials, corrode metals, or have adverse effect on human skin
- SPECIFICATIONS: Duct seal compound; grey in color and putty like; non-corrosive and non-irritant; can be hand-shaped to any form and reused if necessary, has many applications in hvac/r, plumbing, metal fabrication, and a superb general purpose sealant around the home; may be painted immediately after applying and won't bleed through dry paint film
- FOR THE TRADESMAN: RectorSeal is recognized as a leading provider of quality solutions for the professional trades serving heating, ventilation, and air conditioning (HVAC/R), plumbing, electrical, and construction markets

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Rectorseal |
| Style | Putty |
| Item Weight | 1 Pounds |
| Item dimensions L x W x H | 4.5 x 10 x 1.5 inches |
| Water Resistance Level | Waterproof |
| Item Form | Paste |
| UPC | 021449818810 |
| Unit Count | 1.0 Count |
| Global Trade Identification Number | 00021449818810 |
| Number of Items | 1 |
| Color | Gray |
| Manufacturer | The Rectorseal Corporation |
| Part Number | 81881 |
| Item Weight | 1 pounds |
| Product Dimensions | 4.5 x 10 x 1.5 inches |
| Item model number | 81881 |
| Item Package Quantity | 1 |
| Included Components | Duct Seal |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Rectorseal
- **Style:** Putty
- **Item Weight:** 1 Pounds
- **Item dimensions L x W x H:** 4.5 x 10 x 1.5 inches
- **Water Resistance Level:** Waterproof

## Images

![Duct Seal 81881 Duct Seal Compound, Easy Application, HVAC, 5 lb - Image 1](https://m.media-amazon.com/images/I/51wNMjdUSlL.jpg)

## Questions & Answers

**Q: is it removable?**
A: Yes it can be removed. It is like a thick putty. It can be molded and and pushed into cracks.  It's a great sealer.

**Q: Will this work ok for furnace sheet metal ducts? They get to maybe 150F.**
A: I did not buy this for any HVAC repair. I bought it for a metal trap for a pellet gun to silence the noise from pellets hitting the metal.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Weight Checks Out!
*by M***E on March 23, 2024*

I was skeptical as these five-pound blocks of duct seal were lower-priced than anywhere else. However, thanks to the thousands of reviews from folks like me and you, I purchased 4 of the five-pound blocks, and they do weigh 20lbs total. Duct seal is a bit on the expensive side compared to some other materials I could use for a pellet trap, but I shoot high powered units, and duct seal stops with no ricochets. I shoot in my basement, so no ricochets is obviously extra important. As a bonus, the pellet hits are nearly silent down range, and the lead captured by the duct seal can be cleaned out, melted down, and reformed into additional backstop plating. Always remember to use gloves and a respirator if working with lead. I always wash my hands after target practice as well! Thank you for the product reviews and to the old time airgunners that figured out that duct seal is a great and practically permanent product for use as a pellet trap.

### ⭐⭐⭐⭐⭐ Works as it is intended.
*by P***S on November 18, 2023*

Used to seal up traffic lights around race track. The lights had 2 holes in the bottom to run electric feed them. Mice would climb up through the holes around the wiring and make nests inside the lights and chew the insulation off the wires causing them short out.This stuff is used to weather proof electrical service cables houses , seals cables , it doesn’t dry out and stays pliable.Working good so far.

### ⭐⭐⭐⭐⭐ Great for making a homemade pellet trap
*by P***H on July 19, 2014*

I purchased and used this for making a pellet trap. It works extremely well, and was very easy to work with. I like that it is malleable, and can be spread about, while not drying or overly sticking to hands (it does have some tack to it, but only comes off a little bit on hands when working it around), It also seemed to have consistent density- my volume measurements for filling an 8.5"x8.5"x3/4" frame worked well. The tackiness is actually useful for sticking targets to, without having to pin or nail them. It proved to be extremely effective in the wood frame I constructed; Pellets shot by a pistol drop in front of the target with bouncing or ricochet; pellet rifle shots pierced the paper target and penetrated very little @~800fps (only smaller high velocity pellets with a plastic jacket penetrated about 1/4-<1/2"). The shots produce little to almost no sound.I would recommend this to anyone pursuing the same use I purchased it for: The volume of compound and excellent performance are well worth it!

## Frequently Bought Together

- Rectorseal 81881 5-Pound Duct Seal Compound,grey
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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-01-23*