---
product_id: 30816432
title: "81724-12PK Sensor-Safe Ultra Blue RTV Silicone Gasket Maker, 3.35 oz. Tube (Pack of 12)"
brand: "permatex"
price: "VT39856"
currency: VUV
in_stock: true
reviews_count: 8
url: https://www.desertcart.vu/products/30816432-81724-12pk-sensor-safe-ultra-blue-rtv-silicone-gasket-maker
store_origin: VU
region: Vanuatu
---

# -65°F to 500°F temperature range 8x more flexible than cork gaskets 3x more oil resistant than silicones 81724-12PK Sensor-Safe Ultra Blue RTV Silicone Gasket Maker, 3.35 oz. Tube (Pack of 12)

**Brand:** permatex
**Price:** VT39856
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal smarter, not harder — the pro’s choice for flawless gaskets!

## Quick Answers

- **What is this?** 81724-12PK Sensor-Safe Ultra Blue RTV Silicone Gasket Maker, 3.35 oz. Tube (Pack of 12) by permatex
- **How much does it cost?** VT39856 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/30816432-81724-12pk-sensor-safe-ultra-blue-rtv-silicone-gasket-maker)

## Best For

- permatex enthusiasts

## Why This Product

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

## Key Features

- • **Sensor-Safe Formula:** Low odor, non-corrosive, and safe for modern engine sensors—no compromises on tech compatibility.
- • **Bulk Pack Efficiency:** Sold in convenient 12-pack tubes, ideal for professional garages or serious DIYers stocking up.
- • **Unmatched Flexibility:** Eight times more flexible than traditional cork/composite gaskets for superior sealing under stress.
- • **Ultimate Oil Resistance:** Three times more resistant to oil than conventional silicones, ensuring long-lasting durability.
- • **Wide Temperature Tolerance:** Performs flawlessly from -65°F up to 500°F intermittent heat, perfect for extreme conditions.

## Overview

Permatex 81724-12PK Ultra Blue RTV Silicone Gasket Maker is a sensor-safe, low-odor, and non-corrosive sealant designed for automotive applications. It offers eight times the flexibility of cork gaskets and three times the oil resistance of standard silicones, withstanding temperatures from -65°F to 500°F. Sold in a 12-pack of 3.35 oz tubes, it’s engineered for valve covers, oil pans, and other critical engine components, delivering superior durability and torque retention for professional-grade repairs.

## Description

Permatex Ultra Blue Multipurpose RTV Silicone Gasket Makers are sensor-safe, low odor and non-corrosive, with outstanding oil resistance and joint movement values. Developed to meet today's technology changes, Permatex ultra silicones are eight times more flexible than cork/composite gaskets and three times more oil resistant than conventional silicones. With a temperature range of -65 degrees fahrenheit to 500 degrees fahrenheit intermittent, these OEM specified gaskets resist auto and shop fluids, as well as vibration. These gasket makers offer significant performance advantages, excellent torque retention and hi-temp, sensor-safe properties. Permatex always has the right gasket maker for your application.

## Features

- Sold in case packs of 12
- Eight times more flexible than cork/composite gaskets
- Three times more oil resistant than conventional silicones
- Sensor-safe, low odor and non-corrosive
- Suggested Applications: Valve covers, oil pans, timing covers, transmission pans, differential covers

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Permatex |
| Item Weight | 0.01 Ounces |
| Liquid Volume | 3.3 Fluid Ounces |
| Full Cure Time | 24 Hours |
| Item Form | Paste |
| Surface Recommendation | Metal, Plastic |
| Water Resistance Level | Water Resistant |
| Number of Items | 12 |
| Manufacturer | Permatex |
| Global Trade Identification Number | 30686226817243 |
| Unit Count | 40.2 Fluid Ounces |
| Material | Silicone |
| Model | 81724-12PK |
| Item Weight | 0.01 ounces |
| Product Dimensions | 1 x 3.8 x 8 inches |
| Item model number | 81724-12PK |
| Manufacturer Part Number | 81724-12PK |

## Product Details

- **Brand:** Permatex
- **Item Weight:** 0.01 Ounces
- **Liquid Volume:** 3.3 Fluid Ounces
- **Full Cure Time:** 24 Hours
- **Item Form:** Paste

## Images

![81724-12PK Sensor-Safe Ultra Blue RTV Silicone Gasket Maker, 3.35 oz. Tube (Pack of 12) - Image 1](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ good product
*by P***G on March 9, 2025*

I use this on oil pan gaskets and such. Worked great and does not harm anything. It has fixed several oil leaks on lawn mowers, cars and some other small engine work I have done.

### ⭐⭐⭐⭐⭐ Quality, affordable
*by K***E on September 17, 2023*

I got this to replace the last tube I bought. It was only 1/2 used, but cured in the tube after 3 or 4 years in the garage. I found it to be very good to patch small holes-tears in my ATV seats. Did buy again. Will buy again. Oh.. makes good gaskets too!

### ⭐⭐⭐⭐⭐ Physics lab stuff
*by D***R on July 14, 2019*

Surprise - this is one of two silicones that are useful in the lab as well as in the garage. This one doesn't emit ammonia in curing, (that's the sensor safe thing) and has a near zero vapor pressure once cured, making it valuable to seal tiny leaks in vacuum systems at a tiny fraction of the cost of the "pro" stuff sold to those who don't know this.Yes, it works on your auto, too.The other good one is the red hi-temp stuff (but for different reasons) - it's very hard to ruin the red stuff with heat....

## Frequently Bought Together

- Permatex 81724-12PK Sensor-Safe Ultra Blue RTV Silicone Gasket Maker, 3.35 oz. Tube (Pack of 12)
- THREAD TAPE 1429X1/2"BLU

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**Shop now:** [https://www.desertcart.vu/products/30816432-81724-12pk-sensor-safe-ultra-blue-rtv-silicone-gasket-maker](https://www.desertcart.vu/products/30816432-81724-12pk-sensor-safe-ultra-blue-rtv-silicone-gasket-maker)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-01-23*