5 reasons why wet blasting is highly beneficial for composite bonding.

Wet Blasting is generally one of the most effective and balanced methods for composite bonding surface preparation, especially when bond integrity, cleanliness, and safety are priorities.  

Wet Technologies is known for our reputation in engineering high volume high concentration flow, which differentiates us from our competitors.   

30 SECOND WATCH

Composite etching for bonding refers to the surface treatment of composite materials to enhance adhesion between two surfaces—typically a composite substrate and an adhesive or resin.

This process is essential to ensure strong and durable bonds, especially in aerospace or automotive industries. 

 Why Is Wet Blasting and Drying So Beneficial? 

Wet blasting (also called vapor blasting) uses a pressurized stream of abrasive particles suspended in water to clean and texture a surface. Wet Technologies is known for our reputation in engineering high volume high concentration flow, which differentiates us from our competitors.   

It's highly beneficial for composite bonding for several reasons: 

1. Creates Ideal Surface Roughness 

• Wet blasting abrades the surface at a fine scale without damaging the composite. 

• The result is a uniform, micro-roughened surface that allows for better mechanical interlocking of adhesives. 

2. Removes Contaminants Thoroughly 

• The water medium helps flush away particles, oils, oxidation layers, or residues from the surface. 

• This is better than dry blasting, which can redistribute debris over the surface. 

3. Reduces Heat and Damage 

• Water absorbs heat, minimizing thermal damage to the composite material. 

• This is particularly important for heat-sensitive resin matrices in composites. 

4. Improves Adhesion (Both Mechanical and Chemical) 

• Clean, rough surfaces provide mechanical retention. 

• It also enhances chemical bonding by exposing fresh, reactive surface sites. 

5. Prevents Electrostatic Charging 

• Dry blasting can leave surfaces electro-statically charged, attracting dust or interfering with bonding. 

• Wet blasting neutralizes charge, leading to a cleaner prep.  

Wet Technologies Composite Etching Before & After

Wet Technologies Composite Etching Before & After