Compatible Machines
The Graco 258840 RS Gun, Asm, Ext Mix, Gel is designed for use with Graco fiberglass and gel coat systems. It is commonly installed on the following equipment:
- Graco FRP Gel Coat Systems
- Graco RS Gel Coat Systems
- Graco RS Resin Spray Systems
- Graco FRP Spray-Up Systems
- Graco Composite Manufacturing Systems
- Graco Fiberglass Reinforced Plastic (FRP) Equipment
- Graco Systems using RS External Mix Gel Coat Guns
Product Overview
The Graco 258840 RS Gun, Asm, Ext Mix, Gel is an external-mix spray gun engineered for gel coat and resin applications in fiberglass manufacturing. Designed for durability and easy maintenance, this lightweight gun delivers excellent atomization while helping reduce overspray. Its Air Assist Containment (AAC) technology improves transfer efficiency and keeps production areas cleaner.
The gun is suitable for processing polyester resin and gel coat materials used in marine, recreational vehicle, spa, pool, and industrial composite manufacturing. Tool-less maintenance simplifies cleaning and minimizes downtime.
Features
- External-mix design for gel coat applications
- Lightweight construction for improved operator comfort
- Air Assist Containment (AAC) technology reduces overspray
- Tool-less maintenance for faster servicing
- Compatible with polyester resin and gel coat materials
- Solvent-resistant construction for long service life
- Supplied with CST521 spray tip
- Suitable for demanding FRP production environments
Applications
- Fiberglass boat manufacturing
- Swimming pool production
- Bathtub and spa fabrication
- RV and camper component manufacturing
- Industrial composite production
- Wind energy composite applications
Technical Specifications
| Specification | Details |
| Part Number | 258840 |
| Model | RS External Mix Gun |
| Application | Gel Coat and Resin Spraying |
| Included Tip | CST521 |
| Maximum Fluid Pressure | 2,000 psi |
| Maximum Air Pressure | 125 psi |
| Weight | 2.08 lb (0.94 kg) |
| Material Compatibility | Polyester Resin and Gel Coat |
Benefits
- Provides consistent spray performance for gel coat applications.
- Helps reduce material waste through improved atomization.
- Simple maintenance minimizes production downtime.
- Designed for long-term use in demanding FRP environments.
- Enhances operator comfort with lightweight construction.
Frequently Asked Questions
It is used for spraying gel coat and polyester resin materials in fiberglass reinforced plastic manufacturing applications.
The gun is designed for gel coat and polyester resin materials commonly used in composite manufacturing.
Yes. The gun is supplied with a CST521 spray tip.
Yes. Its tool-less maintenance design allows faster cleaning and servicing, helping reduce downtime.
```
