---
product_id: 9372869
title: "39863 Plastic Adhesion Promoter Aerosol - 14.8 oz."
brand: "sem"
price: "€ 64.86"
currency: EUR
in_stock: true
reviews_count: 8
category: "Sem"
url: https://www.desertcart.hr/products/9372869-39863-plastic-adhesion-promoter-aerosol-14-8-oz
store_origin: HR
region: Croatia
---

# Enhances topcoat bonding strength Speeds up adhesion time 14.8 oz aerosol for easy, even application 39863 Plastic Adhesion Promoter Aerosol - 14.8 oz.

**Brand:** sem
**Price:** € 64.86
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it. Stick it. Own it. The pro’s secret to flawless plastic adhesion.

## Quick Answers

- **What is this?** 39863 Plastic Adhesion Promoter Aerosol - 14.8 oz. by sem
- **How much does it cost?** € 64.86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/9372869-39863-plastic-adhesion-promoter-aerosol-14-8-oz)

## Best For

- sem enthusiasts

## Why This Product

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

## Key Features

- • **Trusted by Pros:** Highly rated with 4.7 stars from 663 users who demand reliability.
- • **Effortless Application:** Aerosol spray delivers smooth, even coverage with zero mess.
- • **Accelerate Your Repairs:** Cuts adhesion time so you finish projects faster and stronger.
- • **Unmatched Bonding Power:** Seals raw plastic surfaces for superior topcoat adhesion every time.
- • **Versatile Compatibility:** Works seamlessly on plastic bumpers and interior parts for flawless finishes.

## Overview

SEM 39863 Plastic Adhesion Promoter is a 14.8 oz aerosol spray designed to enhance adhesion of topcoats on raw plastic surfaces like bumpers and interior parts. With a low viscosity formula, it accelerates curing time and strengthens bond durability, making it a top choice among automotive repair professionals. Highly rated and easy to apply, it ensures your plastic repairs and refinishing projects deliver lasting, professional results.

## Description

Plastic Adhesion Promoter helps seal substrates and increases adhesion of topcoat materials to raw plastic bumpers and interior parts.

Review: Performed amazingly. - Did its job helping me epoxy and patch a hole in a plastic bumper on a 2020 Traverse. I've done similar jobs without using this and I can say the adhesion time was noticeably quicker and cured out stronger as far as I can tell.
Review: does what it is designed to do - facilitates adhesion

## Features

- New

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007VTSRZ8 |
| Best Sellers Rank | #9,678 in Automotive ( See Top 100 in Automotive ) #22 in Body Repair & Restoration Adhesives |
| Brand Name | SEM |
| Color | clear |
| Compatible Material | Plastic |
| Container Type | Aerosol Can |
| Customer Reviews | 4.7 4.7 out of 5 stars (663) |
| Item Form | Spray |
| Item Package Quantity | 1 |
| Item Weight | 16 ounces |
| Manufacturer | SEM |
| Material Type | adhesion promoter |
| Model | 39863 |
| UPC | 646786398636 |
| Unit Count | 14.8 Ounce |
| Viscosity | Low |
| Volume | 14.8 Fluid Ounces |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** SEM
- **Color:** clear
- **Item Form:** Spray
- **Item Package Quantity:** 1
- **Material:** adhesion promoter

## Images

![39863 Plastic Adhesion Promoter Aerosol - 14.8 oz. - Image 1](https://m.media-amazon.com/images/I/218CZj3QLeL.jpg)

## Questions & Answers

**Q: Getting ready to paint a plastic canoe. Will this product work well for that?**
A: Without knowing the type of plastic the canoe is made of I can’t say for sure. 
It’s designed to be sprayed on, then the paint applied between 5 and 15 minutes. 
When used on my door panels, I can only guess that it has helped with the adhesion since there have been no spots where the paint has chipped off. 
SEM is a great product line. 
I would recommend using this product to prep the canoe before painting, especially since it will be in water

**Q: Should the sem 39863 aerosol can have a rattle ball in it?
have shaken it multiple times and it does not seem to have one??**
A: Mine also does not have a rattle ball.  I got it a couple of years ago. Worked great. I'm guessing its doesn't separate as much in the can; so it does need it.

**Q: will this product cover or repair cracked leather, arms rests in vehicles ? Thnaks**
A: No , I don't think it would .

**Q: I have chrome plastic grill trim which I want to paint black. Will this work if I scuff the plastic, use adhesion promoter, primer a black paint**
A: I have tried every adhesion promoter out there. I have sanded the Chrome completely dull. First a small rock chip then the wicking under the finish and now you have a chrome grille all jacked up with scratches and patches of black. Take my word for it just buy a black grille.  I have been in the industry since 1980. Nothing sticks to chrome. Period.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Performed amazingly.
*by V***2 on January 11, 2026*

Did its job helping me epoxy and patch a hole in a plastic bumper on a 2020 Traverse. I've done similar jobs without using this and I can say the adhesion time was noticeably quicker and cured out stronger as far as I can tell.

### ⭐⭐⭐⭐⭐ does what it is designed to do
*by M***R on February 28, 2026*

facilitates adhesion

### ⭐⭐⭐⭐⭐ Works as stated.
*by L***Y on July 29, 2025*

I painted a couple filler panels between tank and fairings on my Honda motorcycle. I used this as it was recommended by SEM, also the maker of the top coat I had chosen. It goes on thin so no real buildup in thickness of the paint which is desirable. If you follow directions it will not run. I top coated using multiple light coats and the result is a professional looking paint job. These products are not cheap but sometimes you have to do it right when painting a high value project. I would recommend this product to anyone.

## Frequently Bought Together

- SEM 39863 Plastic Adhesion Promoter Aerosol - 14.8 oz.
- SEM 38353 Plastic Prep - 12 oz.
- SEM Paints SEM15243 Satin Black Color Coat Aerosol 12 Ounce (Pack of 1)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-04-23*