Painting Exterior Vinyl On Your Home

Davor Perhot
Jun 8
2 min read

Painting exterior vinyl surfaces with the wrong product can lead to a range of issues, both cosmetic and structural. Usual problems are:

Peeling and Flaking

Vinyl expands and contracts with temperature changes. If the paint used isn’t flexible or designed for vinyl, it won’t adhere properly and will eventually peel, bubble, or flake off

Warping

Using a dark color or a paint that absorbs too much heat can cause vinyl to overheat and warp. Vinyl is manufactured with specific colors in mind and painting it too dark can make it absorb more heat than it was designed to handle.

Poor Adhesion

Have you ever tried to brush your fingers over vinyl? It's very slick and standard exterior paints don't bond well to vinyl's slick surface. If a proper bonding primer or vinyl-safe paint isn’t used, the paint may never properly cure or stick

Warranty Issues

Many vinyl manufacturers void warranties if the vinyl is painted, especially with incompatible products.

Fading

Some paints not formulated for vinyl can fade prematurely due to UV exposure.

Using Rennerplast on exterior vinyl surfaces is important for several reasons:

1. Adhesion Enhancement

Vinyl is a slick, non-porous surface, which makes it notoriously hard for coatings to bond to. Rennerplast is designed to chemically bond with vinyl and create a receptive surface for topcoats. Without it, your paint is far more likely to peel or flake off.

2. Durability in Harsh Conditions

Exterior vinyl is constantly exposed to sunlight, temperature swings, moisture, and wind. Rennerplast adds an extra layer of protection and adhesion that ensures the paint system holds up against those stresses.

3. Professional Finish

Using the right primer like Rennerplast promotes a smooth, even finish. It helps prevent issues like fisheyes, bubbling, or uneven absorption, especially important when spraying for that clean factory look.

4. Warranty & Manufacturer Requirements

If you're using a high-end finish system (like Renner or other Italian industrial coatings), many manufacturers require a specific primer for warranty compliance. Skipping Rennerplast could void that.

Our vinyl coating supplier Colour X stands behind the quality and reliability of Rennerplast, a product made by Renner Italia specifically for window manufacturers.

Available in a vast variety of colours, Rennerplast is the vinyl window solution that your home deserves. It is a 2k film forming product,this type of coating involves two components, a base and a hardener, which react together to form a durable, protective film.