---
product_id: 34819328
title: "Hardcast DS321C - 11 oz Gray All Purpose Industrial Grade Duct Caulk Sealant 321 Fiber Reinforced (304159)"
brand: "hardcast"
price: "KD 5.96"
currency: KWD
in_stock: false
url: https://www.desertcart.com.kw/products/34819328-hardcast-ds321c-11-oz-gray-all-purpose-industrial-grade-duct
store_origin: KW
region: Kuwait
---

# Hardcast DS321C - 11 oz Gray All Purpose Industrial Grade Duct Caulk Sealant 321 Fiber Reinforced (304159)

**Brand:** hardcast
**Price:** KD 5.96
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** Hardcast DS321C - 11 oz Gray All Purpose Industrial Grade Duct Caulk Sealant 321 Fiber Reinforced (304159) by hardcast
- **How much does it cost?** KD 5.96 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/34819328-hardcast-ds321c-11-oz-gray-all-purpose-industrial-grade-duct)

## Best For

- hardcast enthusiasts

## Why This Product

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

## Description

Application: Temperature: 35°F to 110°F (1.7°C to 44°C) ; Method: Brush, putty knife, caulk gun ; Preparation: Surface must be dry and free of dirt, oil, and grease. ; Rate: Apply at joints and fasteners to 20-mil-thick wet film ; Clean Up Wet: Soap and water ; Clean Up Dry: UN-TACK or Solvent(Use safe handling practices) ; Painting: Only latex or epoxy paints Technical Data: Color: Gray ; Consistency: Smooth creamy texture ; Base: Synthetic latex ; Solvent: Water ; Weight per Gallon: 10.6 lbs. ; Solids Content: 65% ; Viscosity: Thixotropic ; Coverage Per gal.:Up to 320 lin. ft. at 3" width, 20-mil thickness ; Shore A Hardness: >20 ; Flexibility: Passes 1/4 in. mandrel bend ; Time to Test: 48 hours* ; Service Temperature: -20°F to 200°F ; Weather Resistance: Weather resistant ; Mildew Resistance: Mold & mildew resistant ; VOC: Exempt: 0 g/l, Non-Exempt: 93 g/l (less water) ; Pressure Classes: SMACNA 1/2, 1, 2, 3, 4, 6 and 10 inches w.g. ; Seal Class: Meets Seal Class A ; Freeze/Thaw Stability: Passed 5 Cycles *May vary according to temperature and humidity

## Images

![Hardcast DS321C - 11 oz Gray All Purpose Industrial Grade Duct Caulk Sealant 321 Fiber Reinforced (304159) - Image 1](https://images-na.ssl-images-amazon.com/images/I/01RmK%2BJ4pJL.gif)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.kw/products/34819328-hardcast-ds321c-11-oz-gray-all-purpose-industrial-grade-duct](https://www.desertcart.com.kw/products/34819328-hardcast-ds321c-11-oz-gray-all-purpose-industrial-grade-duct)

---

*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-05-20*