Why use silicone-free preheaters?

What are silicones?

Silicones are organosilicon compounds with excellent chemical, thermal, and electrical properties. They are versatile and found in elastomers, resins, greases, oils, and adhesives. However, what is useful in many areas becomes a major problem in surface technology.

Where can silicones be found?

Common sources of silicone contamination include:

• Textiles and protective clothing
• Components made of silicone rubber
• Adhesives and sealants
• Lubricants, release agents, and plasticizers
• Personal care products (hand creams) and cleaning agents
• Adhesive labels and their backing foils

The Problem: Paint-Wetting Impairment Substances (PWIS)

In painting and bonding technology, the hydrophobic (water-repellent) properties of silicones are fatal. Particularly problematic is the tendency of many silicone compounds to outgas volatile components. These settle on surfaces and prevent proper wetting.

This leads to dreaded painting defects, often referred to as “craters” or “fish-eyes.” The result: expensive rework or scrap. Such outgassing is also strictly unwanted in cleanroom applications.

In the industry, these substances are referred to as PWIS (Paint-Wetting Impairment Substances, or “LABS” in German). Besides silicones, this category also includes:

• Fluorine-containing substances
• Certain oils and greases
• Graphite
• Waxes and paraffins
• Talc

Why conventional heaters are a risk

Many standard industrial heaters are not suitable for PWIS-free zones. The reason: In conventional heating systems, silicone is often used as a cheap, flexible insulation material for cables or heating mats. As soon as these devices heat up, the silicone outgases and distributes itself invisibly throughout the room—and lands on your workpieces.

The Neybo Solution

We understand the critical requirements of paint shops and the automotive industry. Therefore, the following applies to our devices:

We strictly use no silicone in our products, neither in the insulation nor as an adhesive or seal. Our heaters can be safely used in paint-sensitive areas.

Tip for your safety: If process reliability is relevant to you, do not blindly rely on some heater. Explicitly ask your manufacturer about PWIS compliance. Or rely directly on solutions from Neybo.