Caulking Steel Roof Screw Heads: A Quick Price Guide

Caulking screw heads on a steel roof can be a time-consuming and costly process, with sealants and tools adding up. However, it is a critical part of the detailing process that can be made more efficient with the right products and tools. Various sealants are available on the market, such as silicone, acrylic, and polymer sealants, each with its advantages and disadvantages. Additionally, specialised tools like the Albion Engineering B12B30SP Spot-Pro® System can make the job faster and less strenuous, saving time and material.

Cost of sealants for steel roofs

Sealing a metal roof can be a time-consuming and costly endeavour. Sealants are typically sold in tubes of around 10 ounces, with prices ranging from $10 to $12 per tube. This means that, depending on the size of your roof, you may need to purchase multiple tubes of sealant, which can quickly increase the overall cost of the project.

One way to save money on sealant costs is to use a tool that dispenses the perfect amount of product, preventing waste. This can be achieved through a simple DIY tool that utilizes PVC tubing and hose clamps to attach to the cartridge of your chosen sealant. This setup can help you save money by reducing the amount of sealant wasted during the application process.

Additionally, investing in a bulk dispenser with an extension nozzle designed specifically for sealing exposed metal roofing fasteners can be beneficial. These tools can save you time and effort, and some models can hold up to 30 ounces of sealant, reducing the need for frequent refills. However, these bulk dispensers can be more expensive, with prices ranging from $60 to $150.

It's important to note that the type of sealant you choose will also impact the overall cost. Some sealants may be more expensive but offer better durability and longevity, such as urethane caulking. On the other hand, silicone sealants are typically more affordable but may not last as long on a metal roof.

In conclusion, the cost of sealants for steel roofs can vary depending on the tools you use, the type of sealant you choose, and the size of your roof. By considering your specific needs and requirements, you can make informed decisions to keep the costs within your budget.

Tools for applying sealants

When it comes to applying sealants, having the right tools can make all the difference in achieving a clean and professional finish. Here are some essential tools to consider for your next sealing project:

Caulk Guns

A caulk gun is a essential tool for applying sealants. It consists of a trigger-operated applicator that dispenses the sealant from a tube or cartridge. Caulk guns come in various types, including manual and pneumatic options. They are designed to provide controlled application and ensure an even distribution of the sealant.

Sealant Spreaders and Finishing Tools

These tools are used to smooth and finish the applied sealant, creating a neat and uniform appearance. They typically come in different shapes and sizes, allowing you to work effectively on various edges, corners, and joints. Silicone sealant finishing tools are commonly used to achieve a professional-grade finish on joints and corners with minimal effort.

Cartridges and Nozzles

Cartridges and nozzles are important components when working with sealants. Cartridges are containers that hold the sealant material, and they can be attached to caulk guns for easy dispensing. Nozzles, on the other hand, are attached to the end of the cartridge and help control the flow and application of the sealant. Different nozzle sizes and shapes are available to suit various sealing projects.

Sealant Scrapers and Removal Tools

Scrapers and removal tools are handy for preparing surfaces before applying new sealant. They help remove old, damaged, or mildewed sealant from joints and crevices. These tools ensure that the surface is clean and ready for a new application, resulting in a better bond and longer-lasting seal.

Custom-Made Tools

In some cases, you might need to get creative and devise custom tools for specific sealing tasks. For instance, a device typically used for siphoning gas from a car can be adapted to control the dispensing of sealant on metal roof fasteners, resulting in increased efficiency and reduced waste.

Alternative methods to sealants

When it comes to sealing screw heads on a steel roof, using a sealant is indeed one of the most common methods. However, there are alternative approaches that you can consider if you're looking for different options. Here are some detailed descriptions of alternative methods to sealants:

Rubber Gaskets

Rubber gaskets are flat rings made of rubber that can be placed underneath the screw heads before tightening. This method provides a tight seal and also prevents denting when screwing with excessive force. Rubber gaskets are readily available and relatively easy to install, making them a cost-effective alternative to sealants.

Goof Screws

Goof screws are specialised fasteners designed for metal roofs. They are larger screws that feature a bonded neoprene washer attached underneath the screw head. The washer acts as a seal, preventing leaks around the screw. Goof screws are a more permanent solution compared to sealants, as they don't require regular reapplication.

Tar in Tube

Tar in tube, also known as "caulk," is a traditional method used to seal screw heads. It involves using a tube of tar-like sealant to fill the holes before inserting the screws. While this method can be effective, it may not last as long as modern alternatives and could require more frequent maintenance.

Butyl Tape

Butyl tape is an effective alternative to liquid sealants. It is applied directly to the roofing material and provides a strong, long-lasting seal. Butyl tape is often used at the overlaps in panels and around edges to prevent water infiltration. This method is clean, easy to apply, and well-suited for repairing small leaks or damages.

Metal Sheets or Wood Blocks

Instead of using sealants, some people prefer to reinforce the screws by adding additional support. This can be done by placing small blocks of wood or pieces of sheet metal under the holes and then screwing into them. This method strengthens the screw connections and reduces the likelihood of leaks.

While these alternative methods can be effective, it's important to note that they may not be suitable for all situations. The best approach often depends on the specific characteristics of your roof, the climate, and the level of maintenance you're comfortable with. Consulting with a roofing professional can help you determine the most appropriate method for your steel roof.

Types of sealants

There are several types of sealants available for metal roofs, each with its own advantages and disadvantages. Here is an overview of the most common types:

• Silicone Sealants – Silicone sealants are a popular choice for metal roofs due to their flexibility, adhesion to metal surfaces, and ability to block UV rays. They are durable and can handle temperature changes without losing their strength, making them effective at preventing leaks and cracks. Silicone sealants are also long-lasting and compatible with any metal roof colour. However, they come with a higher price tag. Examples of silicone sealants include Novaflex Metal Roof Sealant and GE Silicone Metal Roof Sealant.
• Butyl Sealants – Butyl sealants are known for their strong adhesion and longevity. They are effective at stopping leaks, especially around screws and overlaps. Butyl tape, a type of butyl sealant, is easy to use and provides a tight seal. It is also flexible and can withstand different temperatures. However, butyl sealants can be expensive and difficult to remove once dried.
• Acrylic Sealants – Acrylic sealants are commonly used for roofs as they offer UV protection and can handle various weather conditions. They are flexible and can withstand temperature changes without breaking. Acrylic sealants are also easy to use and clean, making them ideal for quick projects. However, they may not be suitable for flat roofs or cold climates, as they can freeze before setting. Additionally, they may not provide a completely waterproof barrier and need to be applied more frequently than silicone or butyl sealants.
• Polyurethane Sealants – Polyurethane sealants are strong and flexible, making them capable of holding up weight. They adhere well to metal and are resistant to tears and mechanical damage. However, they may not be as flexible as silicone or butyl sealants, and they require a primer for use on metal roofs, which adds time and cost.
• Sealant Tape – Sealant tape, such as butyl tape or Gibraltar butyl tape, can be applied directly to the roofing material, reducing the mess associated with other types of sealants. It is more affordable and suitable for repairing small leaks or damages. However, it should not be used for large issues.
• Other Specialty Sealants – Depending on the specific requirements of your project, there are other specialty sealants available, such as polymer sealants, water-based sealants, and more.

When choosing a sealant for a metal roof, it is important to consider factors such as the climate, the type of roof, and the level of protection needed. Additionally, it is recommended to follow the manufacturer's instructions for application and maintenance to ensure the best results.

Reviews of sealants

There are several sealants available for metal roofs, each with its own advantages and disadvantages. Here are some reviews of different sealants to help you make an informed decision:

Dicor Self-Leveling Lap Sealant: This sealant comes in easy-to-use tubes and is compatible with various materials, including vinyl, wood, aluminum, concrete, and metal. It is self-levelling and long-lasting, according to positive reviews. However, some customers have complained about cheap packaging and bubbling issues.

Liquid Rubber Waterproof Sealant: This liquid rubber sealant provides protection against water and sunlight. It is suitable for large leaks and whole-roof projects. Positive reviews highlight its ability to dry quickly and get into tight cracks. However, some reviewers noted that it didn't work well on wood and leaked easily.

Flex Seal Liquid Rubber: This non-toxic liquid rubber offers both water and UV protection. It is available in different sizes and is suitable for small or minor roof repairs. Positive reviews mention its thick coating and long-lasting, watertight seal. However, some customers found it messy and leaky.

Gorilla Waterproof Patch & Seal Tape: This sealant tape creates a permanent bond and is UV-resistant. It is easy to use and can be used to patch up vulnerable seams and leaks. Positive reviews praise its strong adhesive and user-friendly design. However, some customers felt it didn't hold up well in heavy rain and was difficult to use.

Flex Seal Spray Rubber Sealant Coating: This spray sealant is easy to apply and can handle small to medium-sized roof repairs. It protects surfaces from corrosion and can be used on wet or dry surfaces. Positive reviews highlight its strong seal and versatility. However, some customers noted that it had a strong smell and didn't stay in place.

Liquid Rubber Silicone Roof Coating: This silicone-based sealant offers excellent water resistance and UV reflectivity. It works on various roof types, including flat, sloped, and metal. Positive reviews mention its water-resistance, easy application, and ability to blend in with existing coatings. However, some users found it messy and challenging to apply.

Sikaflex Self-Leveling Sealant: This polyurethane sealant is perfect for sealing small leaks. It has a fast curing time and is paintable, sandable, and stainable. Positive reviews mention its easy application and long-lasting performance. However, some customers noted that the colour didn't blend well and that it was messy.

NovaFlex: This sealant is ideal for small leaks and gutters. It is easy to apply and blocks UV rays. It works well with aluminum, copper, and Kynar-painted metal.

Titebond: This sealant is UV-resistant and suitable for extreme weather conditions. It can be used on various materials, including copper, galvanized metal, and Kynar-painted metal.

Geocel Pro flex: This sealant is known for its durability and ability to withstand cold, heat, and UV exposure. It also has strong adhesive properties.

Geocel 4350: This sealant provides a watertight seal and doesn't shrink. It is available in different colours to match your roof. It works on various types of metal roofs, vinyl siding, and asphalt shingles.

Other notable mentions include Rain Buster, Through the Roof, Lexel, Henry's Roofing Cement, and PL® Polyurethane Roof & Flashing Sealant.

When choosing a sealant for your metal roof, consider factors such as the size of the area to be sealed, the type of roof, and the specific requirements, such as UV protection or water resistance. Additionally, take into account the application process, drying time, and longevity of the sealant.

Frequently asked questions