---
product_id: 453118110
title: "39863 Plastic Adhesion Promoter Aerosol - 14.8 oz."
brand: "sem"
price: "$175.80"
currency: USD
in_stock: true
reviews_count: 5
category: "Sem"
url: https://www.desertcart.us/products/453118110-39863-plastic-adhesion-promoter-aerosol-14-8-oz
store_origin: US
region: United States of America
---

# Preps surfaces for flawless paint Bonds tough plastics & vinyl Speeds up adhesion time 39863 Plastic Adhesion Promoter Aerosol - 14.8 oz.

**Brand:** sem
**Price:** $175.80
**Availability:** ✅ In Stock

## Summary

> 🔧 Stick with the best — bond like a pro every time!

## Quick Answers

- **What is this?** 39863 Plastic Adhesion Promoter Aerosol - 14.8 oz. by sem
- **How much does it cost?** $175.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/453118110-39863-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:** 4.8⭐ rating from 654 users confirms reliability
- • **Seamless Paint Prep:** Optimizes surface for Eastwood vinyl & plastic paints
- • **Accelerate Your Repairs:** Cuts adhesion time for faster project completion
- • **Durable, Long-Lasting Bond:** Ensures paint and epoxy stay firmly attached
- • **Universal Plastic Compatibility:** Works on PP, TPO, vinyl, flexible & rigid plastics

## Overview

The SEM 39863 Plastic Adhesion Promoter is a 14.8 oz aerosol spray designed to enhance bonding on challenging plastics like PP and TPO, as well as vinyl and painted surfaces. Ideal for automotive repairs and painting projects, it accelerates adhesion time and creates a durable, long-lasting bond, making it a must-have for professionals and DIYers seeking flawless, reliable results.

## Description

Promotes adhesion to problem plastics such as PP or TPO repair materials and topcoats. Works equally well on most flexible or rigid plastics and on painted surfaces. Great when used prior to the Eastwood vinyl and plastic paints.

Review: Works very well.. - Worked great on plastic and very well on metal. Paint sticks even is very durable on top of adhesive’
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.

## Features

- Plastic Bonding Promoter

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007VTSRZ8 |
| Brand | SEM |
| Brand Name | SEM |
| Colour | Clear |
| Compatible Material | Plastic, Vinyl |
| Container Type | Aerosol Can |
| Customer Reviews | 4.8 out of 5 stars 654 Reviews |
| Item Form | Spray |
| Item Package Quantity | 1 |
| Item Weight | 454 g |
| Manufacturer | SEM |
| Manufacturer Part Number | 39863 |
| Material | Plastic |
| Material Type | Plastic |
| Model | 39863 |
| Other Special Features of the Product | Plastic Bonding Promoter |
| Special Feature | Plastic Bonding Promoter |
| Specific Uses For Product | Automotive Repair, Painting, Plastics, Vinyl, Painted Surfaces |
| UPC | 646786398636 |
| Volume | 14.8 Fluid Ounces |

## Product Details

- **Brand:** SEM
- **Material:** Plastic
- **Item Form:** Spray
- **Colour:** Clear
- **Item Package Quantity:** 1

## Images

![39863 Plastic Adhesion Promoter Aerosol - 14.8 oz. - Image 1](https://m.media-amazon.com/images/I/31mxJNbbCTL.jpg)
![39863 Plastic Adhesion Promoter Aerosol - 14.8 oz. - Image 2](https://m.media-amazon.com/images/I/41-OEz7U1HL.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

### ⭐⭐⭐⭐⭐ Works very well..
*by T***. on 3 May 2026*

Worked great on plastic and very well on metal. Paint sticks even is very durable on top of adhesive’

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

### ⭐⭐⭐⭐⭐ Works as stated.
*by L***Y on 29 July 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 United States of America*
*Store origin: US*
*Last updated: 2026-06-24*