Sand-textured powder coatings

Surface Finish Options Overview

Introduction

Sand-textured powder coatings are a unique type of finish that provide a distinctive, tactile surface with a granular or sandy appearance. Applied as a dry powder and then cured through heat, these coatings create a uniform texture that mimics the feel of sandpaper or fine gravel. The sand-like texture not only adds a visually appealing, non-slip surface but also provides excellent wear resistance and durability. Sand-textured powder coatings are available in a variety of colors and can be customized to meet specific design requirements. Their textured surface also helps to hide minor scratches and imperfections, making them a practical and aesthetic choice for many applications.

Applications

Sand-textured powder coatings are widely used in applications where both functionality and aesthetics are important. In the furniture industry, they are applied to metal chairs, tables, and storage units to provide a non-slip surface and a unique, tactile finish. In the automotive sector, sand-textured coatings are used for underbody parts and engine components, offering protection against wear and corrosion while providing a rugged appearance. In architectural applications, sand-textured powder coatings are ideal for outdoor railings, handrails, and architectural elements, providing a slip-resistant and visually appealing surface. They are also used in industrial settings for equipment and machinery, where their durability and non-slip properties enhance safety and functionality.

Key Features of Sand Texture Powder Coating

Unique Sand-Texture Finish

Available in fine sand, coarse sand, or wrinkle effects, this coating enhances the visual and tactile quality of products, making it an ideal choice for furniture and metal surfaces requiring premium appearance.

Excellent Weather Resistance

Designed for both indoor and outdoor use, sand texture powder coatings provide strong protection against UV radiation, humidity, and temperature fluctuations, ensuring long-lasting color and finish stability.

Scratch & Abrasion Resistance

The textured structure forms a hard and durable film that resists scratches, impacts, and daily wear, suitable for high-contact furniture and industrial parts.

Corrosion Protection

Creates a dense protective layer that prevents damage from moisture, chemicals, and salt spray, extending the service life of coated products.

Eco-Friendly Coating Solution

solvent-free, low VOC, and recyclable, powder coating is an environmentally responsible alternative to traditional liquid paints.

FAQ

1. What is Powder Coating?

Powder coating is a dry finishing process used to apply a protective and decorative coating on metal or other surfaces. Instead of using liquid paint, fine powder particles (usually made of polyester, epoxy, or hybrid resins) are electrostatically charged and sprayed onto a conductive surface. The coated object is then baked in an oven, where the powder melts, flows, and cures into a smooth, durable finish.

Key features:

Durable, hard finish

Resistant to scratches, corrosion, and UV

Environmentally friendly (no VOCs)

2. Benefits of Powder Coating

Powder coating offers several advantages over traditional liquid painting:

Durability: Resistant to chipping, scratching, fading, and wear.

Corrosion Protection: Provides excellent protection against rust and chemicals.

Environmentally Friendly: No volatile organic compounds (VOCs) and minimal waste.

Efficiency: Overspray can be collected and reused, up to 99% material utilization.

Uniform Finish: Smooth, even coating without runs or drips.

Cost-Effective: Single-coat systems can achieve high film thickness, reducing labor and energy.

Aesthetic Variety: Wide range of colors, textures, and effects.

3. What Temperature to Cure Powder Coating

The curing temperature depends on the type of powder used:

Epoxy powder: ~160–200°C (320–392°F)

Polyester powder: ~180–210°C (356–410°F)

Hybrid (Epoxy-Polyester) powder: ~180–200°C (356–392°F)

Typical curing time: 10–20 minutes depending on thickness and oven type.

Always follow the powder manufacturer’s specifications for best results.

4. Process for Powder Coating

The powder coating process usually follows these steps:

Surface Preparation:

Clean the surface thoroughly (remove oil, grease, rust, or dirt)

Methods: chemical cleaning, sandblasting, or phosphating

Pre-Treatment:

Apply a conversion coating or primer if needed to improve adhesion

Powder Application:

Spray the powder using an electrostatic spray gun or fluidized bed

Curing:

Bake the coated object in an oven at the recommended temperature for the powder type

The powder melts and forms a continuous, smooth film

Cooling & Inspection:

Let the coated item cool

Inspect for defects, uniform coverage, and desired thickness

5. How to Spray Powder Coat

Equipment Needed:

Electrostatic spray gun

Compressed air supply

Powder feed hopper or container

Grounding of the object

Steps:

Ground the object: Ensures the charged powder is attracted to the surface.

Spray evenly: Hold the gun 6–12 inches from the surface, moving in smooth, overlapping strokes.

Apply sufficient powder: Ensure full coverage without excessive buildup.

Cure immediately: Transfer the sprayed item to the curing oven to fuse the powder into a solid coating.

Tips:

Maintain consistent speed and distance while spraying.

Use proper ventilation to reduce airborne powder accumulation.

Test a small area to check film thickness and color before full application.