A particularly moisture-resistant and solvent-resistant paint roller cover is one made with a core of phenolic resin. The attachment of the cover’s nap via thermal fusion, also known as flame bonding, is not uncommon and makes the roller cover an adaptable tool for both solvent-based and latex coatings.
What is a Phenolic-Core Roller Cover?
A roller cover, in particular, is a cylindrical construction consisting of an absorbent exterior and a hollow core designed to fit on a roller frame. A roller cover is a useful tool for quickly covering large surfaces with an even coating.
A phenolic roller cover has a phenolic resin core made of a fabric mix and a phenol compound typically found in wood or coal tar.
Advantages of a Phenolic Core
Compared to paint rollers with alternative core materials, phenolic roller covers stand out. They avoid cratered finishes created by air bubbles in foam rollers, and phenolic cores hold their shape where untreated cardboard cores tend to deform with extended moisture exposure.
The Preferred Nap Length
The right nap length for a phenolic-core roller cover depends on the work involved.
- 5/16″ to 3/8″ – matte or eggshell paints
- 3/16″ to 1/4″ – smooth finishes
- 3/8″ – most paints and walls
- 1/2″ – textured or previously painted surfaces
- 3/4″ – rough or concrete block surfaces
Roller Cover Nap Density
The nap density of a phenolic roller cover is important. Higher-density naps, such as lambswool, will hold more paint without splashing and deliver even finishes on textured surfaces. However, while lambswool does work well with alkyd paints, it isn’t compatible with latex.
Microfiber or mohair produce even paints on smooth surfaces. Oil-based paints perform well with natural fibers. Artificial fibers tend to adapt to various coating types, including epoxies or polyurethane.
A Consistent and Moisture Resistant Paint Roller
Whatever the painting application, a phenolic-core roller cover is a moisture-resistant and solvent-resistant option and a consistent base for a variety of painting options that get dependable results.
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