Novol 90538 STP Sprayable Sealant Gun
The Novol 90538 is a specialized pneumatic applicator designed specifically for the application of STP FLOW and STP FLEX sprayable sealants. Unlike standard caulking guns, this tool is engineered to reproduce various OEM (Original Equipment Manufacturer) textures, ranging from narrow beads and wide seams to the "dashed" finishes typically found on modern vehicle chassis and engine bays.
It is a "combi" style gun, meaning it can both spray sealant to create anti-gravel textures and extrude it in a clean line for seam sealing, depending on the nozzle and air settings used.
Key Features & Benefits
- OEM Texture Reproduction: Allows the technician to perfectly match factory-applied sealants, ensuring a "hidden" repair that maintains the vehicle's original appearance.
- Dual-Regulation System: Features independent controls for product flow and air atomization, giving you granular control over the spray pattern and "stipple" density.
- Airtight Storage Design: One of its most unique features - by closing the control and limiter screws, you can store a partially used cartridge inside the gun for up to 6 months without the product hardening or requiring a full tool teardown.
- Precision Nozzle System: Compatible with a range of specialized Novol nozzles (butterfly, wide, narrow) to suit different vehicle manufacturer standards.
- Ergonomic Construction: Built with a lightweight yet durable metal body designed for daily use in high-production body shops.
- Easy Maintenance: The internal design minimizes direct contact between the sealant and the gun body, reducing the need for aggressive solvent cleaning.
Professional Adjustment Tips
- For a "Fine" Texture: Increase the air pressure (towards 6 bar) and reduce the product flow. This atomizes the sealant into smaller droplets, ideal for duplicating modern European car underbodies.
- For a "Coarse" Texture: Lower the air pressure (towards 3 bar) and increase the product flow. This results in larger "clumps," mimicking traditional heavy anti-gravel coatings.
- Extrusion Mode: By shutting off the atomizing air completely and only using the product drive, the gun acts as a high-pressure manual applicator for laying down structural beads in door skins or trunk floors.
- Nozzle Selection: Ensure you use the correct plastic nozzle (e.g., 90812 Butterfly) to achieve wide, flat ribbons of sealant often seen on wheel arches.
