---
product_id: 30987123
title: "RectorSeal Duct Seal 81880 Duct Seal Compound, Easily Applied to HVAC/R, Plumbing, & Metal Fabrication, Paintable & Superior General Purpose Sealant, Easy Application, HVAC, 1 lb"
brand: "rectorseal"
price: "₱1379"
currency: PHP
in_stock: true
reviews_count: 8
category: "Rectorseal"
url: https://www.desertcart.ph/products/30987123-rectorseal-duct-seal-81880-duct-seal-compound-easily-applied-to
store_origin: PH
region: Philippines
---

# Water & chemical resistant, airtight seal Effective application range 25°F–120°F Soft, moldable putty for custom sealing RectorSeal Duct Seal 81880 Duct Seal Compound, Easily Applied to HVAC/R, Plumbing, & Metal Fabrication, Paintable & Superior General Purpose Sealant, Easy Application, HVAC, 1 lb

**Brand:** rectorseal
**Price:** ₱1379
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal smart, seal strong — the tradesman’s secret weapon!

## Quick Answers

- **What is this?** RectorSeal Duct Seal 81880 Duct Seal Compound, Easily Applied to HVAC/R, Plumbing, & Metal Fabrication, Paintable & Superior General Purpose Sealant, Easy Application, HVAC, 1 lb by rectorseal
- **How much does it cost?** ₱1379 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/30987123-rectorseal-duct-seal-81880-duct-seal-compound-easily-applied-to)

## 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

- • **Durable Defense:** Creates a water-tight, chemical-resistant barrier that stands up to water, alcohol, and mild acids.
- • **Mold It Your Way:** Hand-moldable putty adapts perfectly to any surface or shape for a flawless seal every time.
- • **Paint-Ready Finish:** Apply and paint immediately without bleed-through, blending your seal into any professional project.
- • **Safe & Sustainable:** Non-toxic, asbestos-free formula that’s gentle on plastics, metals, and your skin—trade-safe peace of mind.
- • **All-Season Reliability:** Works seamlessly from chilly 25°F to warm 120°F environments—no job too cold or hot.

## Overview

RectorSeal Duct Seal 81880 is a versatile, gray putty compound designed for HVAC, plumbing, and metal fabrication professionals. It offers easy hand application between 25°F and 120°F, forming a durable, water- and chemical-resistant airtight seal. Non-toxic and asbestos-free, it’s safe on plastics, metals, and skin, reusable, and paintable immediately after application—making it the go-to general purpose sealant for tradesmen who demand reliability and efficiency.

## Description

Product Description RectorSeal Duct Seal Compound is a gray, soft, non-toxic, putty-type compound that adheres to most clean dry surfaces. The putty like duct sealant compound is easy to use and can be hand applied from 25°F to 120°F. 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. 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. From the Manufacturer RectorSeal Duct Seal Compound is a gray, permanently soft, non-toxic, putty type compound which adheres to most clean, dry surfaces. It is designed to be used when sealing around the ends of electrical conduit and boxes. 10-Pound.

Review: Great product to have around - Wow, wish I had known about this product before! I purchased it after searching for a way to seal a draft coming in around an interior water pipe. The stickiness was very good yet it was easy to work with, and it took care of sealing out the cold air coming in around the pipe, I highly recommend this.
Review: Sealed around my furnace and it did a great job - I think it will last a long time. - I installed a whole house humidifier (it's dry here in Colorado in the winter) on my furnace and wanted to seal the outside and a certain AI assistant recommended this stuff. It was a good call, I rolled it with my hands into cylinders and put it around the humidifier and the seal is solid and seems like it will last a long time. I am very pleased. It's sticky but not super sticky, pliable but seems like it will stay in place. It doesn't smell much (if at all) and I washed my hands with soap and water and most of it came off with minimal effort.

## 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 reused if necessary
- EASY TO USE: The putty like duct sealant compound is easy to use and can be hand applied from 25°f to 120°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 |
| Item Form | Putty |
| Item dimensions L x W x H | 6.5 x 3 x 3 inches |
| Material | Putty |
| Style | 1 lb |
| Water Resistance Level | Water Resistant |

## Product Details

- **Material:** Putty
- **Brand:** Rectorseal
- **Style:** 1 lb
- **Item dimensions L x W x H:** 6.5 x 3 x 3 inches
- **Water Resistance Level:** Water Resistant

## Images

![RectorSeal Duct Seal 81880 Duct Seal Compound, Easily Applied to HVAC/R, Plumbing, & Metal Fabrication, Paintable & Superior General Purpose Sealant, Easy Application, HVAC, 1 lb - Image 1](https://m.media-amazon.com/images/I/51CWERSfKML.jpg)
![RectorSeal Duct Seal 81880 Duct Seal Compound, Easily Applied to HVAC/R, Plumbing, & Metal Fabrication, Paintable & Superior General Purpose Sealant, Easy Application, HVAC, 1 lb - Image 2](https://m.media-amazon.com/images/I/81EGCVGYIXL.jpg)
![RectorSeal Duct Seal 81880 Duct Seal Compound, Easily Applied to HVAC/R, Plumbing, & Metal Fabrication, Paintable & Superior General Purpose Sealant, Easy Application, HVAC, 1 lb - Image 3](https://m.media-amazon.com/images/I/91v-rpEPXCL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: Is it paintable?**
A: Cannot say. I bought it as a waterproof sealant and for this purpose it works perfectly.

**Q: Is this for 1 lb? Or for 10?**
A: 1 Lb. Was more than enough with plenty left over for other jobs

**Q: Can this be used to patch a hole in the wall around stove gas pipe?**
A: Are you talking about a gas line coming into the stove, I’d say yes it can be. If you’re talking about the actual stove pipe that gets hot then no.

**Q: Would this work to fill a 2 inch hole with electrical wires coming through it that is immersed in hot water?**
A: Yes, the only limit to this material is your wallet and imagination,

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product to have around
*by A***A on December 11, 2025*

Wow, wish I had known about this product before! I purchased it after searching for a way to seal a draft coming in around an interior water pipe. The stickiness was very good yet it was easy to work with, and it took care of sealing out the cold air coming in around the pipe, I highly recommend this.

### ⭐⭐⭐⭐⭐ Sealed around my furnace and it did a great job - I think it will last a long time.
*by P***Y on January 14, 2026*

I installed a whole house humidifier (it's dry here in Colorado in the winter) on my furnace and wanted to seal the outside and a certain AI assistant recommended this stuff. It was a good call, I rolled it with my hands into cylinders and put it around the humidifier and the seal is solid and seems like it will last a long time. I am very pleased. It's sticky but not super sticky, pliable but seems like it will stay in place. It doesn't smell much (if at all) and I washed my hands with soap and water and most of it came off with minimal effort.

### ⭐⭐⭐⭐⭐ Works as intended, easy to use.
*by T***E on October 19, 2025*

Works as intended and no surprises. I used it on my furnace housing inside my basement so I can’t speak to outdoor exposure.

## Frequently Bought Together

- Rectorseal 81880 1-Pound Duct Seal Compound Gray
- Shurtape LS 300 HVAC Line Set Tape, 55m Length x 48mm Width, Black (Pack of 1)
- 3/4" x 6 ft. Elastomeric Pipe Insulation, 1/2" Wall

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-01-23*