1. Introduction
The Fukubi Chemical WTP150H Weathertight 2 is a specialized waterproofing component designed for ventilation pipes with a diameter of 5.9 inches (150 mm). This product utilizes a unique elastomer blend to ensure high elasticity and superior adhesion, providing a reliable and durable waterproof seal. This manual provides essential information for the correct installation, function, and maintenance of your WTP150H Weathertight 2 units.
2. Safety Information
Please read and understand all safety instructions before installation. Failure to follow these instructions may result in property damage or injury.
- Always wear appropriate personal protective equipment (PPE), including gloves and eye protection, during installation.
- Ensure the installation area is clean, dry, and free from debris.
- Consult local building codes and regulations for proper ventilation system installation and waterproofing requirements.
- Keep out of reach of children.
3. Package Contents
Verify that all components are present and undamaged before beginning installation.
- Fukubi Chemical WTP150H Weathertight 2 units (Set of 2)
4. Setup and Installation
The WTP150H Weathertight 2 is designed for easy installation, providing a secure and waterproof seal around ventilation pipes.
- Prepare the Installation Area: Ensure the surface around the ventilation pipe is clean, dry, and smooth. Remove any dust, grease, or loose particles that could hinder adhesion.
- Position the Weathertight 2: Carefully place the WTP150H unit around the ventilation pipe, ensuring it is centered and covers the area requiring waterproofing. The highly elastic elastomer blend allows for a snug fit.
- Ensure Adhesion: Press firmly around the entire circumference of the Weathertight 2 to ensure maximum contact and adhesion to both the pipe and the surrounding surface. The dedicated waterproof material will form a strong bond.
- Verify Seal: Visually inspect the installed unit to confirm a complete and uniform seal. There should be no gaps or lifted edges that could compromise waterproofing.

Image 1: Fukubi Chemical WTP150H Weathertight 2 unit. This image shows the general appearance of the waterproofing component.

Image 2: Fukubi Chemical WTP150H Weathertight 2. This image illustrates the product's design, highlighting its flexibility and intended application for pipe sealing.
5. Operation
Once properly installed, the Fukubi Chemical WTP150H Weathertight 2 operates passively. Its primary function is to maintain a waterproof and airtight seal around the ventilation pipe, protecting the structure from moisture ingress. No active operation or power source is required.
6. Maintenance
To ensure the long-term effectiveness of the WTP150H Weathertight 2, periodic inspection and minimal maintenance are recommended.
- Regular Inspection: Annually inspect the installed Weathertight 2 for any signs of wear, cracking, or detachment. Check for any visible water stains or moisture around the sealed area.
- Cleaning: If necessary, gently clean the surface of the Weathertight 2 and the surrounding area with a mild detergent and water. Avoid abrasive cleaners or tools that could damage the material.
- Damage Assessment: If any damage is observed, assess the integrity of the seal. Minor damage may be repaired with appropriate waterproofing sealants, but significant damage may require replacement of the unit.
7. Troubleshooting
If you encounter issues with the waterproofing performance of your WTP150H Weathertight 2, consider the following:
- Leakage Detected: If water ingress is observed, re-examine the installation thoroughly. The most common cause of leakage is improper adhesion during initial setup. Ensure the surface was clean and dry, and that the unit was pressed firmly into place.
- Poor Adhesion: If the unit is not adhering properly, the surface may not have been adequately prepared (e.g., dirt, moisture, uneven surface). Remove the unit, clean and prepare the surface again, and re-install. If the unit itself is compromised, replace it.
- Material Damage: If the Weathertight 2 material is torn or significantly damaged, its waterproofing capabilities will be compromised. The unit must be replaced.
8. Specifications
| Feature | Detail |
|---|---|
| Brand Name | Fukubi Chemical |
| Model Number | WTP150H |
| Special Features | Waterproof |
| Compatible Pipe Diameter | 5.9 inches (150 mm) |
| Material | Elastomer blend |
9. Warranty and Support
For specific warranty information and customer support, please refer to the documentation provided at the point of purchase or contact Fukubi Chemical directly. Keep your purchase receipt as proof of purchase.