Introduction
This manual provides essential instructions for the proper handling, application, and maintenance of the Hilti 3537998 Firestop Spray CFS-SP WB Red. Adherence to these guidelines ensures optimal performance and safety in fire protection applications. This product is designed for use in specific firestopping systems to seal penetrations and construction joints.
Safety Information
Always read and understand the Safety Data Sheet (SDS) before using this product. Wear appropriate personal protective equipment (PPE), including safety glasses, gloves, and respiratory protection, especially in poorly ventilated areas. Ensure adequate ventilation during application and drying. Keep out of reach of children. Do not ingest. In case of contact with eyes or skin, rinse immediately with plenty of water and seek medical advice.
Storage: Store in a cool, dry place, away from direct sunlight and freezing temperatures. Keep containers tightly closed when not in use. Recommended storage temperature is between 5°C and 25°C (41°F and 77°F).
Product Overview
The Hilti CFS-SP WB Firestop Spray is a water-based, ablative firestop coating designed for spray application. It is used to firestop construction joints and through-penetrations in various fire-rated assemblies. Its red color aids in visual inspection and identification.
Image: Hilti 3537998 Firestop Spray CFS-SP WB Red container. This image shows the product in its typical packaging, highlighting its red color and Hilti branding.
Setup and Preparation
- Surface Preparation: Ensure all surfaces to be treated are clean, dry, and free from dust, oil, grease, and loose particles. Substrates must be structurally sound.
- Mixing: Stir the Hilti CFS-SP WB Firestop Spray thoroughly before use to ensure a consistent mixture. Do not dilute the product unless specifically instructed by Hilti technical data sheets for certain applications.
- Equipment: Use appropriate spray equipment, such as an airless spray pump with a suitable nozzle size (refer to Hilti technical data for specific recommendations). Ensure all equipment is clean and in good working order.
- Masking: Mask off adjacent areas not intended for coating to prevent overspray.
Application Instructions
- Application Temperature: Apply when ambient and substrate temperatures are between 5°C and 40°C (41°F and 104°F).
- Spray Application: Apply the firestop spray evenly to achieve the specified wet film thickness (WFT) as per the approved firestop system design. Maintain a consistent distance and angle from the surface.
- Multiple Coats: If multiple coats are required to achieve the desired dry film thickness (DFT), allow sufficient drying time between coats. Refer to Hilti technical data for specific drying times, which can vary based on temperature and humidity.
- Brush/Trowel Application: For small areas or touch-ups, the product can be applied with a brush or trowel.
- Curing: The product will skin over in approximately 1-2 hours and be tack-free in 2-4 hours. Full cure typically takes 7-14 days, depending on environmental conditions.
Always consult the specific Hilti firestop system documentation for detailed application procedures and required thicknesses for your particular application.
Maintenance and Cleaning
- Equipment Cleaning: Clean all spray equipment and tools immediately after use with water. Do not allow the product to dry in the equipment.
- Spills: Clean up spills immediately with water while the product is still wet. Once cured, the product is difficult to remove.
- Inspection: Periodically inspect installed firestop systems for damage or degradation. Any damaged areas should be repaired using the same Hilti CFS-SP WB Firestop Spray according to application guidelines.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Poor spray pattern / Clogging | Incorrect nozzle size, insufficient mixing, dried product in equipment. | Check nozzle size, ensure thorough mixing, clean equipment thoroughly before and after use. |
| Slow drying time | High humidity, low temperature, excessive film thickness. | Ensure adequate ventilation, maintain recommended application temperatures, apply in specified film thicknesses. |
| Poor adhesion | Unclean or unprepared surface, incompatible substrate. | Thoroughly clean and prepare surfaces. Consult Hilti technical support for substrate compatibility. |
Technical Specifications
- Product Name: Hilti CFS-SP WB Firestop Spray
- Model Number: 3537998
- Color: Red
- Base: Water-based, ablative
- Application Temperature: 5°C to 40°C (41°F to 104°F)
- Storage Temperature: 5°C to 25°C (41°F to 77°F)
- Drying Time (Tack-free): 2-4 hours (approximate, depends on conditions)
- Full Cure: 7-14 days (approximate, depends on conditions)
- Density: Refer to product SDS for exact values.
- Certifications: Consult Hilti technical documentation for specific fire ratings and approvals (e.g., UL, ASTM E814, E2307).
Warranty Information
Hilti products are warranted against defects in materials and workmanship. For detailed warranty terms and conditions, please refer to the official Hilti website or contact Hilti customer service. This warranty typically covers the product itself and not the application or installation, which must be performed according to Hilti's published instructions and local building codes.
Customer Support
For technical assistance, product inquiries, or support, please contact Hilti customer service or visit the official Hilti website. You can find contact information and local support details at www.hilti.com. Please have your product model number (3537998) and any relevant batch numbers ready when contacting support.
