---
product_id: 30816432
title: "81724-12PK Sensor-Safe Ultra Blue RTV Silicone Gasket Maker, 3.35 oz. Tube (Pack of 12)"
brand: "permatex"
price: "€ 164.89"
currency: EUR
in_stock: true
reviews_count: 12
category: "Permatex"
url: https://www.desertcart.nl/products/30816432-81724-12pk-sensor-safe-ultra-blue-rtv-silicone-gasket-maker
store_origin: NL
region: Netherlands
---

# -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:** € 164.89
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal smarter, not harder — the ultra-flexible gasket maker pros trust!

## 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?** € 164.89 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/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

- • **Bulk Pack Convenience:** Available in a 12-pack of 3.35 oz tubes—ideal for professionals and enthusiasts who demand reliability and value.
- • **Unmatched Flexibility:** Eight times more flexible than traditional cork and composite gaskets for superior sealing under stress.
- • **Sensor-Safe & Low Odor:** Formulated to be sensor-safe and non-corrosive, protecting modern engine electronics without the harsh chemical smell.
- • **Ultimate Oil Resistance:** Triple the oil resistance of conventional silicones ensures long-lasting durability in harsh engine environments.
- • **Wide Temperature Tolerance:** Performs flawlessly from freezing -65°F to scorching 500°F intermittent heat, perfect for all engine compartments.

## 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 convenient 12-pack, it’s engineered for valve covers, oil pans, and other critical engine components, delivering superior durability and torque retention trusted by professionals.

## 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.

Review: best all purpose silicone on the market - 50 yr mastertech here . ultra blue is my go to. . great stuff
Review: Works great! - It's kept my valve cover from leaking and it's holding up great so far. You can't go wrong with ultra blue!

## 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 |
|---------------|-------|
| ASIN | B001REZ81O |
| Best Sellers Rank | #36,246 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Industrial Gasket Makers |
| Brand | Permatex |
| Customer Reviews | 4.7 4.7 out of 5 stars (273) |
| Date First Available | April 1, 2004 |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 30686226817243 |
| Item Form | Paste |
| Item Weight | 0.01 ounces |
| Item model number | 81724-12PK |
| Liquid Volume | 3.3 Fluid Ounces |
| Manufacturer | Permatex |
| Manufacturer Part Number | 81724-12PK |
| Material | Silicone |
| Model | 81724-12PK |
| Number of Items | 12 |
| Product Dimensions | 1 x 3.8 x 8 inches |
| Surface Recommendation | Metal, Plastic |
| Unit Count | 40.2 Fluid Ounces |
| Water Resistance Level | Water Resistant |

## Product Details

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

## Images

![81724-12PK Sensor-Safe Ultra Blue RTV Silicone Gasket Maker, 3.35 oz. Tube (Pack of 12) - Image 1](https://m.media-amazon.com/images/I/81tgD0cNNYL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ best all purpose silicone on the market
*by D***S on October 7, 2025*

50 yr mastertech here . ultra blue is my go to. . great stuff

### ⭐⭐⭐⭐⭐ Works great!
*by S***N on September 3, 2025*

It's kept my valve cover from leaking and it's holding up great so far. You can't go wrong with ultra blue!

### ⭐⭐⭐⭐⭐ use as directed
*by D***M on September 8, 2025*

Permatex products always get the job done

## 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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---

*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-19*