Henry 555 roof coating generally refers to Henry 555 Fibered Aluminum Roof Coating, a reflective, asphalt-based coating containing aluminum pigment and reinforcing fibers. It is intended for certain existing roof surfaces, but it is not a universal repair product or a substitute for fixing leaks and damaged roofing. Knowing what the coating does, which surfaces are compatible, and how to prepare and apply it can help property owners evaluate whether it fits a roofing project.
What Is Henry 555 Fibered Aluminum Roof Coating?
Henry 555 is a reflective roof coating made with an asphalt base, aluminum pigment, and fibers. The aluminum gives the cured surface its characteristic silver appearance and reflects some sunlight. The fibers help reinforce the coating film. As with other roof coatings, its function is to protect a suitable roof surface—not to correct structural problems or make every roof waterproof regardless of condition.
Henry markets products under multiple names and formulations, and packaging or technical instructions can change. Before buying, confirm that the container specifically identifies the product as Henry 555 Fibered Aluminum Roof Coating. Then consult the current product data sheet (PDS) and safety data sheet (SDS) for the exact formulation, approved substrates, application rate, temperature limits, drying guidance, and safety precautions.
What Henry 555 Roof Coating Is Used For
Fibered aluminum coatings are typically used on compatible, existing roofs where a reflective protective coating is appropriate. The product may be considered for some asphaltic roofing systems, such as certain built-up or modified-bitumen roofs, subject to Henry’s current substrate instructions. Compatibility should never be assumed from appearance alone: two roofs that look similar may use different materials or have different surface conditions.
A silver coating can reduce the amount of solar energy absorbed by a roof compared with a dark surface. However, the effect on indoor temperatures, cooling costs, or roof life depends on the whole building: insulation, ventilation, climate, roof condition, and the coating’s coverage and maintenance all matter. A coating is not a replacement for attic insulation, ventilation improvements, or repairs to a failing roof system.
Henry 555 is also not a product to use indiscriminately on shingles, wet surfaces, ponding areas, or roofs with active leaks. Some roofing materials require a different coating or no coating at all. The manufacturer’s current instructions take precedence over general guidance, and a roofing professional can help identify the roof assembly when its material is uncertain.
Benefits And Limitations
Potential benefits
- Reflective finish: The aluminum-colored surface reflects some sunlight and may help limit solar heat absorption compared with an uncoated dark roof.
- Surface protection: On a suitable, properly prepared roof, a coating can provide a protective layer against weather exposure.
- Fiber reinforcement: Fibers in the formula help reinforce the coating film; they do not replace roofing fabric, flashing, or a proper repair.
- Maintenance option: Coating may be part of a maintenance plan for an eligible roof that is still in sound condition.
Important limitations
- It will not fix underlying damage. Rot, loose roofing, failed seams, open flashing, and structural defects need appropriate repair before coating.
- It is not a guaranteed leak cure. Active leaks should be traced and repaired; simply coating over a wet or damaged area can conceal the problem and trap moisture.
- Surface compatibility matters. Incorrect use can lead to poor adhesion, incompatibility, or premature failure.
- Weather and application conditions matter. Rain, dew, low temperatures, strong wind, or a contaminated surface can affect application and curing.
- It requires maintenance. Roof coatings weather over time, and their condition should be checked as part of regular roof inspections.
Check Roof Compatibility Before Buying
The most important pre-purchase step is identifying the roof material and condition. Review the Henry 555 PDS for the listed approved uses and exclusions. If the roof has a manufacturer’s warranty, consult its terms as well; applying an unapproved coating may affect warranty coverage. When roof composition is unclear, a qualified roofer can inspect it and determine whether the coating is suitable.
Compatibility is only one part of the assessment. The roof should be sound enough to coat, with loose material removed and repairs completed using suitable methods. Water must not be trapped beneath the coating. Check for blistering, open laps, cracked or deteriorated areas, standing water, and failed details around drains, vents, edges, and penetrations.
Pay special attention to roof drainage. A coating does not correct poor slope or eliminate recurring ponding. If water remains on a roof after ordinary drainage time, the roof may need repair or redesign before a coating is considered. The PDS should be checked for limitations related to ponding water and other site conditions.
Roof Preparation Before Application
Preparation strongly affects adhesion and performance. Follow the current Henry instructions rather than relying on a generic coating procedure. In general, the roof surface should be clean, dry, stable, and free of loose debris. Dust, dirt, oil, grease, loose granules, and deteriorated coating can interfere with bonding. Do not wash a roof and coat it before it has dried fully.
Inspect the entire surface before starting. Repair leaks, open seams, damaged flashing, and other defects with materials appropriate to the roof system. Allow repair products to cure as directed. Do not assume Henry 555 itself is designed to bridge a gap or seal every roof detail; the relevant product instructions distinguish coating from repair work.
Plan the job around the weather forecast and the manufacturer’s stated conditions. The surface and air temperature limits, rain-free period, and drying time are product-specific. Avoid applying when rain, dew, or freezing conditions could affect the uncured film. Keep the work area clear and use fall protection appropriate to the roof and local safety requirements.
How To Apply Henry 555 Roof Coating
Use the current PDS and container label for the exact instructions. The following outline is general and should not replace those directions:
- Confirm the product and substrate. Check the label, product data sheet, roof type, and any applicable warranty requirements.
- Estimate the quantity. Measure the roof area and calculate the amount using Henry’s stated coverage rate. Actual use can vary with surface texture, porosity, and application method.
- Prepare the roof. Clean, dry, inspect, and repair the surface as instructed. Protect nearby areas from splatter.
- Mix as directed. Follow the label for stirring or handling. Do not add solvents or other materials unless the manufacturer explicitly permits it.
- Apply the specified amount. Use an application tool and method allowed by the PDS. Work evenly, and avoid leaving thin spots, excessive buildup, or missed areas.
- Allow proper drying. Protect the coating from rain and traffic for the period specified by Henry. Drying depends on product conditions and weather.
- Inspect the finished work. Look for missed areas, damage, or application defects after the coating has dried, and address them according to manufacturer guidance.
Do not guess at coverage. Applying too little can leave inadequate protection, while excess material may dry poorly or fail to perform as intended. Roof size, texture, and the product’s current formulation all influence the amount needed. The container label and current PDS are the reliable sources for the correct rate.
Safety, Storage, And Cleanup
Read the product label and SDS before opening the container. Asphalt-based aluminum coatings can contain ingredients that require careful handling, and the exact hazards depend on the formulation. Follow the SDS guidance for ventilation, protective clothing, eye protection, skin contact, first aid, storage, and disposal. Keep the product away from children, ignition sources, and areas where vapors could accumulate.
Use only the cleanup method specified by Henry. Do not pour leftover coating or cleaning materials into drains, onto soil, or into storm sewers. Dispose of unused product and containers according to the label and local waste rules. For a large job, enclosed work area, or uncertain exposure concern, consult the SDS and a qualified safety professional before proceeding.
How To Estimate Henry 555 Roof Coating
Start with the roof’s measured surface area, not merely the building’s footprint. Sloped roofs have more surface area than the horizontal area beneath them. Divide the measured area by the coverage figure on the current Henry label or PDS to estimate the quantity, then account for the surface condition and any application details specified by the manufacturer.
For example, if a product’s current instructions state coverage in square feet per gallon, the basic estimate is roof area divided by that coverage figure. This calculation is only a planning aid: rough or porous surfaces may consume more product, and the manufacturer may specify a particular application rate rather than a broad coverage range. Do not use an online listing as a substitute for the instructions on the actual container.
Buying Henry 555: What To Verify
Product listings can be incomplete or out of date. Before purchasing, compare the listing with the label and current manufacturer documentation. Useful checks include:
- The full product name and product number match Henry 555 Fibered Aluminum Roof Coating.
- The container size and quantity are suitable for the measured roof area.
- The current PDS confirms the intended roof type and application conditions.
- The SDS and label are available for the specific product being sold.
- The product is in good condition and has been stored according to its instructions.
- Any roof warranty or building requirements permit the proposed coating.
Prices and availability vary by retailer and location. Comparing cost per gallon alone can be misleading: the required application rate, roof preparation, repair materials, labor, and disposal can significantly affect the total project cost.
Henry 555 Compared With Other Roof Coatings
Henry 555 is an aluminum-pigmented, fibered asphalt coating, but roof coatings are not interchangeable. Other products may be acrylic, silicone, elastomeric, or designed for a specific roof material. They can differ in reflectivity, flexibility, compatibility, resistance to standing water, application requirements, and cleanup. A coating’s marketing category does not establish that it is appropriate for a particular roof.
| Comparison point | What to check |
|---|---|
| Roof material | Does the current PDS specifically allow the existing substrate? |
| Roof condition | Are repairs, drainage improvements, or replacement needed first? |
| Application conditions | What temperature, dryness, and weather limits apply? |
| Performance needs | Is reflectivity, flexibility, or resistance to ponding water important? |
| Warranty | Will the coating affect the roof-system warranty? |
Common Questions About Henry 555 Roof Coating
Does Henry 555 stop roof leaks?
It should not be treated as a guaranteed leak repair. A leak may originate at a seam, flashing, penetration, drain, or damaged roof layer. The source needs to be identified and repaired with a method compatible with the roofing system before coating is considered.
Can Henry 555 be applied to any roof?
No. Suitability depends on the roof material, surface condition, and Henry’s current product instructions. Confirm compatibility in the PDS, and ask a roofing professional if the existing roof system is unknown.
How long does Henry 555 take to dry?
Drying time is affected by the specific product formulation, application thickness, temperature, humidity, and ventilation. Use the current label and PDS rather than assuming a fixed number of hours.
How much Henry 555 is needed?
Measure the actual roof surface and use the coverage or application rate printed in current Henry documentation. Surface texture and condition can change how much coating a job consumes.
Reliable Product Information
For the most accurate details, consult Henry’s official product page and the current documentation linked there: Henry Company. Check the specific Henry 555 product data sheet and safety data sheet before planning work; third-party retailer descriptions may not reflect the latest instructions. For guidance on roof-system compatibility, warranty conditions, or repairs, consult the roof manufacturer or a qualified roofing professional.