---
product_id: 719548605
title: "3145 RTV 90ml 3oz Clear Adhesive Sealant Mil-A-46146 Electrical Battery Board Housing Moisture Sealing Non Flow Primerless Adhesion High Strength Group II/III (3145 Clear 90ml)"
brand: "hushoil"
price: "€ 85.46"
currency: EUR
in_stock: true
reviews_count: 8
category: "Hush Oil"
url: https://www.desertcart.fi/products/719548605-3145-rtv-90ml-3oz-clear-adhesive-sealant-mil-a-46146
store_origin: FI
region: Finland
---

# Water resistant & non-flowing High tensile strength 940 psi Wide temp range -45°C to 200°C 3145 RTV 90ml 3oz Clear Adhesive Sealant Mil-A-46146 Electrical Battery Board Housing Moisture Sealing Non Flow Primerless Adhesion High Strength Group II/III (3145 Clear 90ml)

**Brand:** hushoil
**Price:** € 85.46
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal with confidence, stick with the best!

## Quick Answers

- **What is this?** 3145 RTV 90ml 3oz Clear Adhesive Sealant Mil-A-46146 Electrical Battery Board Housing Moisture Sealing Non Flow Primerless Adhesion High Strength Group II/III (3145 Clear 90ml) by hushoil
- **How much does it cost?** € 85.46 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/719548605-3145-rtv-90ml-3oz-clear-adhesive-sealant-mil-a-46146)

## Best For

- hushoil enthusiasts

## Why This Product

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

## Key Features

- • **Precision Seal:** Non-sag formula perfect for vertical and overhead surfaces
- • **Flexible & Tough:** 660% elongation absorbs vibration and thermal expansion
- • **Effortless Application:** One-part, primerless adhesion with no mixing or ovens needed
- • **Military-Grade Durability:** Meets MIL-A-46146 specs for ultimate reliability
- • **Electrical & Moisture Shield:** High dielectric strength (500 V/mil) protects sensitive components

## Overview

The 3145 RTV 90ml Clear Adhesive Sealant is a military-spec, one-part silicone sealant designed for electrical, battery, and housing applications. It offers high tensile strength, exceptional flexibility, and water resistance, curing at room temperature without primer. Its non-flow, non-sag formula ensures precise application on complex assemblies, while its superior dielectric properties provide reliable moisture and electrical insulation protection.

## Description

3145 RTV Sealant Clear or Gray Available MIL-A-46146 Dow 3145 Adhesive Sealant 90ml one Tube One-part, moisture RTV, non-flow, high strength, UL and Mil Spec. Uses Sealing openings in modules and housings. Adding mechanical stability to individual components. Assembly of components on PWBs. Sealing in and around wired and electrical leads. Temperature Range: -45 °C ~ 200 °C Benefits Non-flowing High tensile strength and elongation Enhanced thermal stability MIL-A-46146 Group II/III, TY I No mixing required Room temperature cure, no ovens required Faster in-line processing with optional heat acceleration Can be considered for uses with Mil Spec requirements Application Benefits Non-Slump Primerless Adhesion Use: Battery Pack, Boards and Assemblies, Components, Housings Water Resistant Certifications & Standards Regulatory Approvals: MIL Spec Product Use and Formulating Cure Characteristics: Room Temperature Long Working Time > 10 min Cure Type: Alkoxy Cure, Condensation Cure, Methoxy Cure Number of Parts: 1 part Room Temperature Cure: 48 Hours Tack-Free Time-50% RH: 55 Minutes Typical Properties Adhesion to: Glass, Nylon 6/6 Color: Clear, Grey Dielectric Constant at 100 Hz: 2.83 Dielectric Constant at 100 kHz: 2.83 Dielectric Strength: 500 volts per mil v/mil Dissipation Factor at 100 Hz: <0.001 Durometer - Shore A: 45 Elongation: 660% Linear CTE: 370 µm/m/Deg C Nonflowable: Yes Shelf Life: 360 Days Specific Gravity: 1.1 @ 25°C Tensile Strength: 940 psi Volume Resistivity: 4.4e+014 Ω·cm

Review: Strong, Flexible, and Built for Tough Jobs - I have used the adhesive one only, but am looking to use it more often in the short term, it seems like a solid product. It’s a clear RTV silicone sealant that’s made for electrical, battery, and housing applications, and it’s rated to military standards. That alone makes me feel confident it’s built for durability and long-term use. What stands out is that it’s non-sagging, so you can apply it on vertical or overhead surfaces without worrying about it running. It also cures at room temperature and doesn’t need a primer for most materials, which should make application easier. The sealant is flexible once cured, which means it can handle vibration, movement, and temperature changes without cracking. It’s also rated for a wide temperature range and has good dielectric strength, so it doubles as a moisture seal and an electrical insulator. That makes it versatile for both mechanical and electronic work. The only thing to keep in mind is that curing can take some time, especially in deeper sections, so giving it a full day or more before stressing the bond will likely give the best results. Overall, this looks like a high-quality adhesive for serious jobs. I’ll be interested to see how it performs after more use, but based on the specs and reputation, it seems like a dependable option.
Review: Not a typical adhesive. Sealant that adheres to things that you meant to seal and prevent moisture - This is not an adhesive as other people stated. This is sealant that adhere to things that you meant to seal. DOW 3145 RTV Clear Adhesive Sealant (90ml) offera primerless adhesion and high-strength sealing without corroding metals—perfect for battery housings, boards, or any moisture-prone components. I've used it to waterproof the electronic circuits in my tankless water heater, creating a non-flow, impermeable barrier that keeps out humidity and ensures reliable performance just in case if environment becomes damp. Tough, reliable, and a must-have for sealing connectors, wires and circuits.

## Features

- 3145 RTV, 90ml 3oz one Tube. Clear / Gray. One-part, moisture RTV, non-flow, high strength, Adhesive Sealant. Sealing, Assembly of components on PWBs, Electrical use
- Color: Clear, Grey. Dielectric Constant at 100 Hz: 2.83. Dielectric Strength: 500 volts per mil v/mil. Dissipation Factor at 100 Hz: < 0.001. Durometer - Shore A: 45. Elongation: 660% Linear CTE: 370 µm/m/Deg C. Shelf Life: 360 Days. Specific Gravity: 1.1 @ 25°C. Tensile Strength: 940 psi. Volume Resistivity: 4.4e+014 Ω·cm.
- Sealing. Battery Pack, Boards and Assemblies, Components, Housings. Electrical Use. PWBs
- Non-flowing. High tensile strength and elongation. Enhanced thermal stability. Water Resistant. Non-Slump. Primerless Adhesion

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0F2MY7WJS |
| Best Sellers Rank | #74,647 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #62 in Industrial Joint Sealants |
| Brand | HushOil |
| Date First Available | March 27, 2025 |
| Item Form | Gel |
| Item Weight | 4.2 ounces |
| Manufacturer | dow |
| Material | no |
| Number of Items | 1 |
| Package Dimensions | 6.77 x 1.89 x 1.38 inches |
| Style | tube |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** HushOil
- **Item Form:** Gel
- **Material:** no
- **Style:** tube
- **Water Resistance Level:** Water Resistant

## Images

![3145 RTV 90ml 3oz Clear Adhesive Sealant Mil-A-46146 Electrical Battery Board Housing Moisture Sealing Non Flow Primerless Adhesion High Strength Group II/III (3145 Clear 90ml) - Image 1](https://m.media-amazon.com/images/I/41-OJ-9UwKL.jpg)
![3145 RTV 90ml 3oz Clear Adhesive Sealant Mil-A-46146 Electrical Battery Board Housing Moisture Sealing Non Flow Primerless Adhesion High Strength Group II/III (3145 Clear 90ml) - Image 2](https://m.media-amazon.com/images/I/41EDwv54gXL.jpg)
![3145 RTV 90ml 3oz Clear Adhesive Sealant Mil-A-46146 Electrical Battery Board Housing Moisture Sealing Non Flow Primerless Adhesion High Strength Group II/III (3145 Clear 90ml) - Image 3](https://m.media-amazon.com/images/I/41Gjmo+bGZL.jpg)
![3145 RTV 90ml 3oz Clear Adhesive Sealant Mil-A-46146 Electrical Battery Board Housing Moisture Sealing Non Flow Primerless Adhesion High Strength Group II/III (3145 Clear 90ml) - Image 4](https://m.media-amazon.com/images/I/41hgoc-HhXL.jpg)
![3145 RTV 90ml 3oz Clear Adhesive Sealant Mil-A-46146 Electrical Battery Board Housing Moisture Sealing Non Flow Primerless Adhesion High Strength Group II/III (3145 Clear 90ml) - Image 5](https://m.media-amazon.com/images/I/513el66uBeL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Strong, Flexible, and Built for Tough Jobs
*by L***N on September 7, 2025*

I have used the adhesive one only, but am looking to use it more often in the short term, it seems like a solid product. It’s a clear RTV silicone sealant that’s made for electrical, battery, and housing applications, and it’s rated to military standards. That alone makes me feel confident it’s built for durability and long-term use. What stands out is that it’s non-sagging, so you can apply it on vertical or overhead surfaces without worrying about it running. It also cures at room temperature and doesn’t need a primer for most materials, which should make application easier. The sealant is flexible once cured, which means it can handle vibration, movement, and temperature changes without cracking. It’s also rated for a wide temperature range and has good dielectric strength, so it doubles as a moisture seal and an electrical insulator. That makes it versatile for both mechanical and electronic work. The only thing to keep in mind is that curing can take some time, especially in deeper sections, so giving it a full day or more before stressing the bond will likely give the best results. Overall, this looks like a high-quality adhesive for serious jobs. I’ll be interested to see how it performs after more use, but based on the specs and reputation, it seems like a dependable option.

### ⭐⭐⭐⭐⭐ Not a typical adhesive. Sealant that adheres to things that you meant to seal and prevent moisture
*by A***5 on September 22, 2025*

This is not an adhesive as other people stated. This is sealant that adhere to things that you meant to seal. DOW 3145 RTV Clear Adhesive Sealant (90ml) offera primerless adhesion and high-strength sealing without corroding metals—perfect for battery housings, boards, or any moisture-prone components. I've used it to waterproof the electronic circuits in my tankless water heater, creating a non-flow, impermeable barrier that keeps out humidity and ensures reliable performance just in case if environment becomes damp. Tough, reliable, and a must-have for sealing connectors, wires and circuits.

### ⭐⭐⭐⭐ Excellent glue, using it on some outside statues to repair them.
*by D***O on August 17, 2025*

Excellent glue, using it on some outside statues to repair them. The end of the mermaids tail in the picture I put back on using a stick inside the tail with this glue. The larger crack above is from another glue that isn't water resistant enough. It was stable enough to put back by the waterfall in about 2 hours. Since it is waterproof, should last a long time. Only reason I removed a star is the packaging, after you have used it once and resealed it you end up with a plug of the glue you have to remove. I'm planning on using it to do a repair of the repair on the larger crack. I think the price is about right for the functionality and ease of use.

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-01-29*