---
product_id: 13055648
title: "Metacaulk 150+ 66383 Firestop Sealant, Safe and Easy Application, Firestop, 30 oz., Single-Component, Highly Intrumescent and VOC Compliant"
brand: "rectorseal"
price: "S$74"
currency: SGD
in_stock: true
url: https://www.desertcart.sg/products/13055648-metacaulk-150-66383-firestop-sealant-safe-and-easy-application-firestop
store_origin: SG
region: Singapore
---

# Water-resistant & freeze-thaw durable 4-hour fire resistance Easy retrofit & multi-application Metacaulk 150+ 66383 Firestop Sealant, Safe and Easy Application, Firestop, 30 oz., Single-Component, Highly Intrumescent and VOC Compliant

**Brand:** rectorseal
**Price:** S$74
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the deal with confidence—firestop that works as hard as you do!

## Quick Answers

- **What is this?** Metacaulk 150+ 66383 Firestop Sealant, Safe and Easy Application, Firestop, 30 oz., Single-Component, Highly Intrumescent and VOC Compliant by rectorseal
- **How much does it cost?** S$74 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/13055648-metacaulk-150-66383-firestop-sealant-safe-and-easy-application-firestop)

## 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

- • **Dynamic Flexibility:** Elastomeric cure handles movement and temperature shifts from 40°F to 120°F without cracking.
- • **Versatile Application:** Seals metal, plastic, fiberglass pipes, cables, and wall joints—one sealant, endless solutions.
- • **Unmatched Fire Defense:** Rated up to 4 hours per ASTM E814 & E1966 standards—protect your projects with confidence.
- • **Effortless Installation:** Water-based, non-sag formula applies smoothly with standard caulking tools—no special skills needed.
- • **Eco-Conscious & Compliant:** VOC compliant and mold-resistant—safe for indoor use and paintable to blend seamlessly.

## Overview

Rectorseal 66383 Metacaulk MC 150+ is a 30-ounce, water-based firestop sealant designed for professional-grade fire, smoke, and water barrier protection. Rated for up to 4 hours of fire resistance per ASTM standards, it offers flexible, non-sag application on a variety of surfaces including metal, plastic, and cables. Easy to apply with conventional tools, it cures elastomerically to accommodate dynamic movement and temperature variations, while being VOC compliant and mold-resistant for safe, durable indoor use.

## Description

Rectorseal66383 30-Ounce Cartridge Metacaulk Mc 150+ Firestop Sealant

## Features

- APPLICATION: Firestop sealant prevents the spread of fire, smoke, hot gasses, and water; for construction joints and through penetrations; can be used on metal, insulated pipe, fiberglass, plastic pipe, wall joint, power, telephone, and datacomm cables
- EASY INSTALLATION: Water based, non-sag caulking, grade heat resistant sealant that is easy to apply as well as retrofit; it cures to an elastomeric seal that is suitable where dynamic movement is expected; can be applied from a tube, sausage pack, or pail; is applied with a conventional caulking gun, bulk loading gun, or can be troweled from the pail
- SPECIFICATIONS: All systems rated for up to 4 hours as per ASTM E814 (UL1479) and ASTM E1966 (UL 2079) test standards; for temperature applications of 120 degrees fahrenheit; flexible barrier protection; interior use and paintable; excellent freeze-thaw caulk; VOC compliant
- CONVENIENT: No special skills required to apply firestop sealant; the sealant does not have to be pre-mixed
- 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 |
|---------------|-------|
| Color | Red |
| Brand | Rectorseal |
| Item Weight | 2.3 Pounds |
| Liquid Volume | 887 Milliliters |
| Item Form | Caulk |
| Surface Recommendation | Indoor/ Outdoor |
| Temperature Range | 40- 120 Degrees Fahrenheit |
| Water Resistance Level | Water Resistant |
| Number of Items | 1 |
| Manufacturer | The Rectorseal Corporation |
| UPC | 021449663830 |
| Global Trade Identification Number | 00021449663830 |
| Unit Count | 1.0 Count |
| Material | Water-based and non-sag. VOC compliant. Protected in wet & dry stages against mold growth with a combination of biocides. |
| Part Number | 66383 |
| Item Weight | 2.33 pounds |
| Product Dimensions | 2.5 x 2.5 x 14 inches |
| Country of Origin | China |
| Item model number | 66383 |
| Size | 30 oz |
| Item Package Quantity | 1 |
| Included Components | Firestop Caulk |
| Batteries Required? | No |

## Product Details

- **Color:** Red
- **Brand:** Rectorseal
- **Item Weight:** 2.3 Pounds
- **Liquid Volume:** 887 Milliliters
- **Item Form:** Caulk

## Images

![Metacaulk 150+ 66383 Firestop Sealant, Safe and Easy Application, Firestop, 30 oz., Single-Component, Highly Intrumescent and VOC Compliant - Image 1](https://m.media-amazon.com/images/I/516YeuA8m3L.jpg)

## Frequently Bought Together

- Rectorseal 66383 30-Ounce Cartridge Metacaulk Mc 150+ Firestop Sealant
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- 3M Fire Block Foam FB-Foam, Orange Color, Ready-To-Use, In-Place, 12 fl oz Can

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**Shop now:** [https://www.desertcart.sg/products/13055648-metacaulk-150-66383-firestop-sealant-safe-and-easy-application-firestop](https://www.desertcart.sg/products/13055648-metacaulk-150-66383-firestop-sealant-safe-and-easy-application-firestop)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-08*