---
product_id: 58747093
title: "IDEAL Industries 31-601 Duct Seal Compound, 1 lb Block, Gray Putty for Sealing Junction Boxes, Service Entrances & HVAC Penetrations"
brand: "ideal industries"
price: "$37.00"
currency: USD
in_stock: true
category: "Ideal Industries"
url: https://www.desertcart.us/products/58747093-ideal-industries-31-601-duct-seal-compound-1-lb-block
store_origin: US
region: United States of America
---

# Weatherproof & durable Permanently soft & moldable Air & moisture barrier IDEAL Industries 31-601 Duct Seal Compound, 1 lb Block, Gray Putty for Sealing Junction Boxes, Service Entrances & HVAC Penetrations

**Brand:** ideal industries
**Price:** $37.00
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal smarter, not harder — the flexible fix that lasts!

## Quick Answers

- **What is this?** IDEAL Industries 31-601 Duct Seal Compound, 1 lb Block, Gray Putty for Sealing Junction Boxes, Service Entrances & HVAC Penetrations by ideal industries
- **How much does it cost?** $37.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/58747093-ideal-industries-31-601-duct-seal-compound-1-lb-block)

## Best For

- ideal industries enthusiasts

## Why This Product

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

## Key Features

- • **Seal Like a Pro:** Creates an airtight, moisture-proof barrier that locks out drafts, dust, and pests for ultimate protection.
- • **Paint It Your Way:** Jobsite-ready and paintable immediately after application for a seamless, professional finish.
- • **Safe on All Fronts:** Non-corrosive formula protects wiring and surfaces, compatible with metal, plastic, wood, and masonry.
- • **One Block, Multiple Jobs:** Convenient 1 lb block size offers ample material for all your sealing needs—perfect for pros and DIYers alike.
- • **Stay Flexible, Stay Ready:** Putty-like consistency remains soft and pliable—no cracking, shrinking, or drying out, so you can rework anytime.

## Overview

The IDEAL 31-601 Duct Seal Compound is a versatile, permanently soft sealing putty designed to block air, moisture, and dust around electrical and HVAC penetrations. Safe for multiple surfaces and paintable immediately, it offers weatherproof protection without cracking or shrinking, making it a must-have for professionals and DIY enthusiasts aiming for durable, clean, and efficient seals.

## Description

Seal gaps, protect installations, and improve energy efficiency with the IDEAL 31-601 Duct Seal Compound. Designed for electricians, contractors, and DIYers, this high-performance sealing putty forms a reliable barrier around junction boxes, service entrances, and conduit penetrations. Unlike traditional fillers that dry out or crack, this permanently soft compound stays flexible over time—allowing for easy adjustments without compromising the seal. Its non-toxic, non-corrosive formula makes it safe for use with sensitive electrical components and a wide range of materials including metal, wood, masonry, and plastic. Ideal for both indoor and outdoor applications, this duct seal helps prevent drafts, moisture intrusion, and pest entry—while maintaining a clean, professional finish that can be painted immediately after use.

## Features

- Air & Moisture Seal: Creates a durable barrier that blocks air leaks, moisture, dust, and drafts around electrical boxes, conduit, and wall penetrations
- Permanently Soft & Easy to Mold: Putty-like consistency stays flexible over time-won't harden, crack, or shrink, making it easy to apply, remove, and rework as needed
- Safe & Non-Corrosive: Formulated to be safe for use around plastics and metals-won't corrode wiring or damage surfaces
- Multi-Surface Versatility: Adheres to metal, masonry, wood, and plastic for electrical, HVAC, plumbing, and general sealing applications
- Paintable & Jobsite Ready: Can be painted immediately after application for a clean finish-suitable for visible installations
- Weatherproof Protection: Provides reliable outdoor and indoor performance by preventing drafts and moisture intrusion through sealed penetrations
- Convenient 1 lb Block Size: Comes in a ready-to-use 1 lb block format that provides ample material for multiple sealing projects and applications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003MZK122 |
| Best Sellers Rank | #44,030 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #56 in HVAC Ducting |
| Brand Name | Ideal Industries |
| Color | Black |
| Compatible Material | Metal, Plastic, Rubber |
| Customer Reviews | 4.7 4.7 out of 5 stars (727) |
| Global Trade Identification Number | 00783250316014 |
| Included Components | Duct Seal |
| Item Dimensions | 8 x 4 x 2 inches |
| Item Form | Putty |
| Item Weight | 1 Pounds |
| Manufacturer | IDEAL |
| Material Type | Aluminum, Rubber |
| Model | 31-601 |
| Number of Items | 1 |
| Part Number | 31-601 |
| Style Name | Compact |
| Supported Standards | UL |
| Surface Recommendation | Metal |
| UPC | 013227238897 783250316014 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Ideal Industries
- **Item Weight:** 1 Pounds
- **Item dimensions L x W x H:** 8 x 4 x 2 inches
- **Material:** Aluminum, Rubber
- **Style:** Compact

## Images

![IDEAL Industries 31-601 Duct Seal Compound, 1 lb Block, Gray Putty for Sealing Junction Boxes, Service Entrances & HVAC Penetrations - Image 1](https://m.media-amazon.com/images/I/718Bc2LOwaL.jpg)

## Available Options

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

## Questions & Answers

**Q: does this have a adhesive on the back?**
A: No, this is like play dough.  You can mold it into anything.  Hope this helps.

**Q: can this be used in 3 in. PVC conduit service entrance coming out of the ground to block water coming through conduit and feeder wires to the meter?**
A: Yes

**Q: May we know if it has certified by Underwriter's Labotratories?**
A: Yes it is, UL# R11734

**Q: could it be used to fill the gap between the skimmer body and pool concrete siding?**
A: Sure.... It is for outdoor use

## Frequently Bought Together

- Duct Seal 1 lb
- 900 Moldable Silicone Putty - Black
- Rectorseal 81880 1-Pound Duct Seal Compound Gray

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-03*