---
product_id: 42038532
title: "SF 7649 Primer and Cleaner"
brand: "loctite"
price: "R$637"
currency: BRL
in_stock: true
reviews_count: 3
category: "Loctite"
url: https://www.desertcart.com.br/products/42038532-sf-7649-primer-and-cleaner
store_origin: BR
region: Brazil
---

# Long on-part life Optimizes anaerobic adhesive curing Effective below 15°C SF 7649 Primer and Cleaner

**Brand:** loctite
**Price:** R$637
**Availability:** ✅ In Stock

## Summary

> 🔗 Lock it down, even when the cold tries to break you.

## Quick Answers

- **What is this?** SF 7649 Primer and Cleaner by loctite
- **How much does it cost?** R$637 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/42038532-sf-7649-primer-and-cleaner)

## Best For

- loctite enthusiasts

## Why This Product

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

## Key Features

- • **Extended On-Part Life:** Keeps surfaces primed and ready longer, reducing rework and downtime.
- • **Cold-Weather Performance:** Reliable curing acceleration even in temperatures below 15°C—no more seasonal delays.
- • **Dual-Action Primer & Activator:** Cleans down to bare metal while speeding up adhesive curing for rock-solid bonds.
- • **Water Resistant & Satin Finish:** Protects surfaces with a sleek satin look, maintaining durability in humid or wet conditions.
- • **Metal & Inert Surface Specialist:** Engineered for passive metals and large bond gaps, ensuring superior adhesion where others fail.

## Overview

Loctite SF 7649 Primer and Cleaner is a solvent-based activator designed to enhance the curing speed and bond strength of anaerobic adhesives on passive metals and inert surfaces. With a long on-part life and effective performance at temperatures below 15°C, it ensures reliable adhesion in challenging conditions. Its dual function as a cleaner and primer prepares surfaces for maximum bonding, making it a must-have for professionals demanding durable, water-resistant joints.

## Description

LOCTITE® SF 7649 is designed to promote the curing speed of LOCTITE anaerobic adhesives and sealants without any significant loss of joint strength. It is especially recommended for applications with passive metals or inert surfaces and with large bond gaps. LOCTITE SF 7649 offers good performance at low cure temperatures, and is recommended when the application temperature is below 15°C.

Review: Cleaner/Primer for loctite - This is the good stuff. If you ever wondered if thread locker or sleeve locking compound would hold something that is greasy or dirty, it really doesn't - at least not very well. Use this stuff to clean down to bare metal, apply the locking compound, and it will hold much better. Not only is it a primer, but it is also an activator, and (according to the label) it helps things cure faster. I don't know about that, but I do know I had a bolt that kept coming loose even with the high strength red loctite, and when using this, it has stayed tight. I never could get the threads perfectly 'clean' before, and I think that is the difference. There may be other things that would have worked, but I can say for sure this did the job.
Review: Good Price - My coworker, Mechanic, needed this product as he really liked it. So I found a good price on desertcart.

## Features

- A solvent-based primer that features very long on-part life

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000HZJEF0 |
| Best Sellers Rank | #428,922 in Automotive ( See Top 100 in Automotive ) #143 in Automotive Primers |
| Brand | Loctite |
| Color | Clear |
| Color Code | 000000 |
| Coverage | 25 |
| Date First Available | June 28, 2010 |
| Department | unisex-adult |
| Finish Type | Satin |
| Included Components | bottle |
| Item Form | Liquid |
| Item Volume | 4.5 Fluid Ounces |
| Item Weight | 4.8 ounces |
| Item model number | 21348 |
| Manufacturer | Loctite |
| National Stock Number | 8030-00-980-3975, 8030-01-152-2285 |
| Package Information | Can |
| Product Dimensions | 6 x 2.3 x 2.3 inches |
| Size | 4.5 Fl Oz (Pack of 1) |
| Special Feature | Long On-Part Life, Low Temperature Functionality |
| Specific Uses For Product | primer |
| Surface Recommendation | Metal |
| Unit Count | 4.5 Fluid Ounces |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Loctite
- **Color:** Clear
- **Finish Type:** Satin
- **Item Form:** Liquid
- **Item Volume:** 4.5 Fluid Ounces
- **Size:** 4.5 Fl Oz (Pack of 1)
- **Special Feature:** Long On-Part Life, Low Temperature Functionality
- **Specific Uses For Product:** primer
- **Surface Recommendation:** Metal
- **Unit Count:** 4.5 Fluid Ounces

## Images

![SF 7649 Primer and Cleaner - Image 1](https://m.media-amazon.com/images/I/416FmqWWhkL.jpg)

## Questions & Answers

**Q: Is there a less expensive substitute (acetone for example)?**
A: I’m not sure if there’s any substitutes all I know is Loctite is an industry standard and it works good

## Customer Reviews

### ⭐⭐⭐⭐⭐ Cleaner/Primer for loctite
*by J***A on September 17, 2025*

This is the good stuff. If you ever wondered if thread locker or sleeve locking compound would hold something that is greasy or dirty, it really doesn't - at least not very well. Use this stuff to clean down to bare metal, apply the locking compound, and it will hold much better. Not only is it a primer, but it is also an activator, and (according to the label) it helps things cure faster. I don't know about that, but I do know I had a bolt that kept coming loose even with the high strength red loctite, and when using this, it has stayed tight. I never could get the threads perfectly 'clean' before, and I think that is the difference. There may be other things that would have worked, but I can say for sure this did the job.

### ⭐⭐⭐⭐⭐ Good Price
*by A***R on January 2, 2022*

My coworker, Mechanic, needed this product as he really liked it. So I found a good price on Amazon.

### ⭐⭐⭐⭐ Quality
*by D***R on February 26, 2021*

It works like it should

## Frequently Bought Together

- Loctite SF 7649 Primer and Cleaner
- ESKONKE Retaining Compound Green 638 Sleeve Retainer High Strength Cylindrical Metal Components Assemblies Locking and Sealing Anaerobic Glue 1.69 Oz/50 ml

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**Shop now:** [https://www.desertcart.com.br/products/42038532-sf-7649-primer-and-cleaner](https://www.desertcart.com.br/products/42038532-sf-7649-primer-and-cleaner)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-03-11*