This document provides the necessary instructions and troubleshooting for the application of the Vulkem Pedestrian Deck Coating System to qualify for a Tremco warranty.
Introduction
The Vulkem 350/351 Pedestrian Deck Coating System is a composite waterproofing system comprised of tough-curing liquid polyurethane. It cures to form a rubber membrane surface that provides a lasting and easy-to-clean coating. This system is ideal for plazas‚ recreation decks‚ balconies‚ mechanical rooms‚ stadiums‚ athletic surfaces and similar applications requiring an elastomeric waterproofing system.
Textured surfaces for pedestrian traffic will use an aggregate-laden top membrane to aid in wear and slip resistance; This system is designed to provide a durable and long-lasting waterproof membrane for a variety of applications.
The Vulkem 350/351 system should be applied in accordance with the instructions provided in this document. Proper application is essential to ensure the system performs as intended and meets the specified warranty requirements.
Purpose
The purpose of this document is to establish uniform procedures for applying the Vulkem 350/351 Pedestrian Deck Coating System. The techniques involved may require modifications to adjust to jobsite conditions. This document is intended to provide a comprehensive guide to the proper application of the Vulkem 350/351 system‚ ensuring that the system is installed correctly and meets the required performance standards.
The Vulkem 350/351 system is designed to provide a durable and long-lasting waterproof membrane for a variety of applications. By following the instructions outlined in this document‚ users can ensure that the system is installed correctly and meets the specified warranty requirements.
If you have any questions about your application‚ contact Tremco Commercial Sealants and Waterproofing for further assistance. Tremco provides a wide range of sealant‚ weatherproofing‚ residential waterproofing and passive fire control solutions for commercial and residential construction and industrial applications.
System Description
Vulkem 350/351 is a composite waterproofing system comprised of tough-curing liquid polyurethane. It cures to form a rubber membrane surface that provides a lasting and easy-to-clean coating. Textured surfaces for pedestrian traffic will use an aggregate-laden top membrane to aid in wear and slip resistance. This system is ideal for plazas‚ recreation decks‚ balconies‚ mechanical rooms‚ stadiums‚ athletic surfaces and similar applications requiring an elastomeric waterproofing system. The Vulkem 350/351 system is designed to provide a durable and long-lasting waterproof membrane‚ while also offering excellent resistance to foot traffic and wear.
Vulkem 350 Base Coat is a single-component urethane membrane that bonds firmly to clean‚ dry concrete and metal. It retains its integrity even if substrate movement causes hairline cracks of up to 1/16 (1.5 mm). If cut or damaged‚ Vulkem 350 will prevent water migration between itself and the substrate. The base coat provides a strong and flexible foundation for the top coat‚ ensuring that the system is properly sealed and protected from water ingress.
Vulkem 351 Top Coat is a high-build‚ textured top coat that is designed to provide a durable and slip-resistant surface. This top coat is available in a variety of colors and textures‚ allowing users to customize the finished appearance of the deck. The top coat provides a final layer of protection‚ ensuring that the deck is both aesthetically pleasing and functional.
Surface Preparation
Proper surface preparation is crucial for the successful application of Vulkem 350/351. This includes ensuring that the substrate is clean‚ dry‚ and free of any contaminants that could impede adhesion. The following steps should be followed for each substrate type⁚
Concrete
Concrete surfaces must be clean‚ sound‚ and free of any laitance‚ curing compounds‚ dust‚ dirt‚ grease‚ oil‚ or other contaminants. All loose or deteriorated concrete must be removed‚ and any cracks or voids should be repaired with a suitable patching compound. The surface should be roughened to provide a good mechanical bond for the Vulkem 350/351. This can be achieved through methods like sandblasting‚ grinding‚ or using a mechanical scarifier.
Wood
Wood surfaces must be clean‚ dry‚ and free of any dirt‚ dust‚ grease‚ oil‚ or other contaminants. All loose or deteriorated wood must be removed‚ and any cracks or voids should be repaired with a suitable patching compound. The surface should be primed with a suitable wood primer to enhance adhesion. The wood should be a minimum 5/8 (16mm) thickness exterior grade plywood laid with the A side up and securely fastened to meet local uplift and other building code requirements. A consistent 1/16 joint should be provided between adjacent panels.
Metal
Metal surfaces must be clean‚ dry‚ and free of any rust‚ scale‚ dirt‚ grease‚ oil‚ or other contaminants. All loose or deteriorated metal must be removed‚ and any cracks or voids should be repaired with a suitable patching compound. The surface should be primed with a suitable metal primer to enhance adhesion.
Concrete
Concrete surfaces must be clean‚ sound‚ and free of any laitance‚ curing compounds‚ dust‚ dirt‚ grease‚ oil‚ or other contaminants. All loose or deteriorated concrete must be removed‚ and any cracks or voids should be repaired with a suitable patching compound. For optimal adhesion‚ it’s essential to ensure the concrete surface is properly prepared. This involves removing any laitance‚ which is a weak‚ powdery layer that can form on the surface of concrete during curing. Curing compounds‚ which are applied to concrete to prevent moisture loss‚ can also hinder adhesion and should be removed.
Additionally‚ the surface should be roughened to provide a good mechanical bond for the Vulkem 350/351. This can be achieved through methods like sandblasting‚ grinding‚ or using a mechanical scarifier. Prior to application‚ the concrete surface should be thoroughly cleaned to remove any remaining dust‚ dirt‚ or debris. This ensures optimal adhesion and a durable finish.
The Vulkem 350/351 system should only be applied to properly prepared concrete surfaces. Following these guidelines will ensure the longevity and effectiveness of the waterproofing membrane.
Wood
Wood surfaces must be clean‚ dry‚ and free of any dirt‚ grease‚ oil‚ or other contaminants. All loose or deteriorated wood must be removed‚ and any cracks or voids should be repaired with a suitable patching compound. Wood surfaces should be primed with a compatible primer to ensure proper adhesion and prevent the Vulkem 350/351 from absorbing into the wood. This priming step is crucial for achieving a strong and durable bond between the waterproofing membrane and the wood substrate.
The primer should be applied according to the manufacturer’s instructions‚ allowing it to dry completely before applying the Vulkem 350/351. Properly primed wood surfaces will provide a smooth and consistent base for the waterproofing membrane‚ allowing it to adhere effectively and form a reliable seal.
Vulkem 350/351 should only be applied to clean‚ dry‚ and properly primed wood surfaces. This approach ensures the effectiveness of the waterproofing membrane and its ability to withstand the elements.
Metal
Metal surfaces must be clean‚ dry‚ and free of any rust‚ scale‚ oil‚ grease‚ or other contaminants. Thoroughly clean the metal surface using a wire brush‚ sandpaper‚ or a suitable cleaning solution. Remove any loose or flaking paint or coatings. After cleaning‚ ensure the metal surface is free of any remaining contaminants. Properly prepare the metal surface for priming.
Apply a suitable primer designed for metal surfaces and compatible with Vulkem 350/351. The primer helps enhance adhesion between the waterproofing membrane and the metal surface‚ preventing corrosion and ensuring a durable bond. Apply the primer according to the manufacturer’s instructions‚ allowing it to dry completely before applying Vulkem 350/351.
Vulkem 350/351 should only be applied to clean‚ dry‚ and properly primed metal surfaces. This ensures the effectiveness of the waterproofing membrane and its ability to withstand the elements.
Mixing Instructions
Thoroughly mix Vulkem 350NF prior to use‚ as proper mixing ensures even consistency and optimal performance. Mixing time requirements can vary depending on temperature and humidity. Colder material may require longer mixing times due to its higher viscosity. For efficient mixing‚ use large spiral paint mixing blades‚ which create the desired vortex for even disbursement of the material.
Before applying Vulkem 350NF‚ mix it with a spiral paint mixing paddle at a rate of 500 rpm for a minimum of 5 minutes. Refer to the Vulkem 350NF Mixing Guide at www.tremcosealants.com for detailed instructions. Ensure that the material is thoroughly mixed to achieve a uniform consistency.
Proper mixing is crucial for achieving the desired performance and durability of the Vulkem 350/351 system. Follow the mixing instructions carefully‚ as improper mixing can compromise the effectiveness of the waterproofing membrane.
Application Instructions
The application process for Vulkem 350/351 involves two distinct steps⁚ applying the base coat and then the top coat. The base coat‚ Vulkem 350NF‚ provides a strong foundation for the top coat‚ Vulkem 351NF‚ and is essential for achieving a durable and waterproof membrane.
Apply the base coat at a rate of 40-64 ft²/gal or 25-40 wet mils (0.6-1 mm) thick‚ covering the entire area to be coated‚ including detail coats. The recommended method of application is with a notched squeegee‚ followed by cross-rolling if leveling is needed. Allow the base coat to cure for a minimum of 12 hours‚ as cure rates depend on temperature and humidity.
Once the base coat has cured‚ apply the top coat‚ Vulkem 351NF‚ at a rate of 200 ft²/gal (5 m²/L)‚ aiming for 8 wet mils. Use a medium-nap solvent-resistant roller to achieve an even coat‚ avoiding puddles or thick areas. The top coat provides the final layer of protection and ensures a smooth‚ durable finish.
Base Coat
The Vulkem 350NF base coat is a single-component‚ low-odor‚ low-VOC‚ urethane membrane designed to bond firmly to clean‚ dry concrete‚ plywood‚ and metal. This base coat serves as the initial layer of the Vulkem 350/351 waterproofing system‚ providing a strong foundation for the top coat. Its exceptional adhesion and flexibility allow it to withstand substrate movement‚ accommodating hairline cracks of up to 1/16 (1.5 mm) without compromising the integrity of the membrane.
In the event of cuts or damage‚ Vulkem 350NF effectively prevents water migration between itself and the substrate‚ ensuring ongoing protection against moisture intrusion. Applying the base coat at a rate of 40-64 ft²/gal or 25-40 wet mils (0.6-1 mm) thick is recommended. The application method involves using a notched squeegee‚ followed by cross-rolling if leveling is required. Allowing the base coat to cure for a minimum of 12 hours is essential for optimal performance‚ as cure rates are influenced by temperature and humidity.
Top Coat
The Vulkem 351 top coat is the final layer of the Vulkem 350/351 waterproofing system‚ responsible for providing the durable‚ watertight seal. This layer is typically applied over the cured base coat‚ creating a seamless‚ monolithic membrane that protects the substrate from moisture damage. The top coat can be applied using a medium-nap‚ solvent-resistant roller‚ ensuring an even and consistent coverage. A rate of 200 ft²/gal (5 m²/L) is recommended‚ resulting in an 8 wet mil thickness.
Applying the top coat with care is essential‚ avoiding puddles or thick areas that could hinder the curing process and compromise the membrane’s integrity. Once applied‚ the top coat requires a minimum of 24 hours to cure before foot traffic is permitted.
For textured surfaces intended for pedestrian traffic‚ an aggregate-laden top membrane is employed to enhance wear resistance and prevent slipping. This textured surface provides a durable and safe walking surface‚ ensuring the long-term functionality of the waterproof deck.
Curing Time
The curing time for Vulkem 350/351 is a crucial factor in achieving a durable and waterproof membrane. The curing process is influenced by factors such as temperature and humidity‚ impacting the time it takes for the membrane to reach its full strength and water resistance.
Generally‚ Vulkem 350NF requires a minimum of 6 hours and a maximum of 24 hours to cure‚ with cure rates varying depending on temperature and humidity. Colder temperatures and higher humidity tend to slow down the curing process‚ requiring longer curing times.
To ensure optimal curing‚ it’s essential to refer to the cure rate guideline chart provided in the Vulkem 350/351 application instructions. This chart outlines the expected curing times based on various temperature and humidity conditions‚ allowing for accurate planning and scheduling of the project.
Cleaning
Maintaining a clean work area is essential during the application of Vulkem 350/351. Tools and equipment used in the application process should be thoroughly cleaned immediately after use to prevent the curing material from hardening and becoming difficult to remove.
For cleaning tools and equipment‚ it’s recommended to use a solvent-resistant cleaner specifically designed for polyurethane-based materials. Avoid using water or water-based cleaners as they can negatively affect the curing process and potentially damage the membrane.
When cleaning spills or overspray‚ act quickly. Use a clean cloth or absorbent material to wipe up the excess material before it hardens. Once cured‚ hardened material can be difficult to remove and may require specialized cleaning techniques.
Safety Precautions
Working with Vulkem 350/351 requires adherence to safety precautions to protect both the applicator and the surrounding environment. Always consult the Material Safety Data Sheet (MSDS) for detailed information about the product’s hazards and proper handling procedures.
Ensure adequate ventilation during application and curing to minimize exposure to fumes and vapors. Use appropriate personal protective equipment (PPE)‚ including gloves‚ eye protection‚ and respiratory protection‚ as recommended by the MSDS. Avoid contact with skin‚ eyes‚ and clothing. In case of contact‚ flush the affected area with plenty of water and seek medical attention if necessary.
Store Vulkem 350/351 in a cool‚ dry‚ well-ventilated area‚ away from direct sunlight and heat sources. Keep containers tightly closed to prevent evaporation and contamination. Dispose of waste materials responsibly according to local regulations.
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