---
product_id: 279731133
title: "SEM 39863 Plastic Adhesion Promoter Aerosol - 14.8 oz."
brand: "sem"
price: "B/.7"
currency: PAB
in_stock: false
category: "Sem"
url: https://www.desertcart.com.pa/products/279731133-sem-39863-plastic-adhesion-promoter-aerosol-14-8-oz
store_origin: PA
region: Panama
---

# Perfect prep for flawless paint finish Boosts adhesion on tough plastics Versatile on flexible & rigid surfaces SEM 39863 Plastic Adhesion Promoter Aerosol - 14.8 oz.

**Brand:** sem
**Price:** B/.7
**Availability:** ❌ Out of Stock

## Summary

> 🎯 Nail every paint job with SEM 39863 – the secret weapon for flawless adhesion!

## Quick Answers

- **What is this?** SEM 39863 Plastic Adhesion Promoter Aerosol - 14.8 oz. by sem
- **How much does it cost?** B/.7 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/279731133-sem-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

- • **Spray-On Convenience:** 14.8 oz aerosol delivers precise, mess-free coverage for professional results every time.
- • **Multi-Surface Mastery:** Works equally well on flexible plastics, rigid plastics, and even metal surfaces.
- • **Seamless Surface Prep:** Prepares both painted and bare plastics for a smooth, durable topcoat application.
- • **Trusted by Pros & DIYers:** Highly rated with 4.7 stars from 661 reviews, making it a go-to for automotive and furniture repairs.
- • **Unmatched Plastic Bonding Power:** Ensures paint and repair materials stick like never before on PP, TPO, and more.

## Overview

SEM 39863 Plastic Adhesion Promoter is a 14.8 oz aerosol spray designed to dramatically improve paint and repair material adhesion on challenging plastics like PP and TPO. Ideal for prepping flexible, rigid, and painted surfaces, it ensures a durable, professional finish trusted by automotive and furniture repair pros alike.

## 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.

## Features

- Plastic Adhesion Promoter, 20oz Aerosol Can Sem-39863
- Plastic Adhesion Promoter 20oz Aerosol Can Sem-39863

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007VTSRZ8 |
| Best Sellers Rank | #71,786 in Automotive ( See Top 100 in Automotive ) #287 in Automotive Fillers, Adhesives & Sealants |
| Brand Name | SEM |
| Color | clear |
| Compatible Material | Plastic |
| Container Type | Aerosol Can |
| Customer Reviews | 4.7 4.7 out of 5 stars (676) |
| Item Form | Spray |
| Item Package Quantity | 1 |
| Item Weight | 1 Pounds |
| Manufacturer | SEM |
| Material Type | adhesion promoter |
| Model | 39863 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Promotes adhesion to problem plastics such as PP or TPO and repair materials |
| Part Number | 39863 |
| Specific Uses For Product | Repair, Furniture |
| UPC | 646786398636 |
| Unit Count | 14.8 Fluid Ounces |
| Viscosity Level | Low |
| Volume | 14.8 Fluid Ounces |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** SEM
- **Item form:** Spray
- **Material:** adhesion promoter
- **Special features:** Promotes adhesion to problem plastics such as PP or TPO and repair materials
- **Specific uses for product:** Repair, Furniture

## Images

![SEM 39863 Plastic Adhesion Promoter Aerosol - 14.8 oz. - Image 1](https://m.media-amazon.com/images/I/41Rqpfp7haL.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.

## 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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**Shop now:** [https://www.desertcart.com.pa/products/279731133-sem-39863-plastic-adhesion-promoter-aerosol-14-8-oz](https://www.desertcart.com.pa/products/279731133-sem-39863-plastic-adhesion-promoter-aerosol-14-8-oz)

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-11-13*