SEBS vs Silicone vs Acrylic Roof Coatings: Why Topps Seal Wins on Elongation and Tensile Strength

Completed aerial view of a fully coated seamless bright white reflective metal roof on a large commercial building

Product Category: Commercial Roof Coatings

Topps Seal® is a premium 100% rubber ultra-elastomeric roof coating designed for discerning facility owners who need exceptional flexibility, strength, and long-term roof protection without immediately pursuing full replacement.

The Performance Challenge for Commercial Roofs

Commercial and industrial roofs experience constant movement. Daily temperature changes expand and contract metal panels, seams, fasteners, and other roofing materials.

A coating must move with the roof without cracking, splitting, or losing adhesion. It must also resist tearing when exposed to wind, maintenance traffic, impact, and substrate movement.

Two specifications help evaluate that performance:

  • Elongation: The coating’s ability to stretch before breaking.
  • Tensile strength: The force the coating withstands before it breaks or tears.

Many roof coatings offer one characteristic more effectively than the other. Topps Seal® is engineered to deliver both.

Topps Seal® at a Glance

Topps Seal® uses SEBS rubber technology to create a seamless, single-ply rubber layer over compatible roofing substrates.

Its published performance specifications include:

Performance characteristic Topps Seal® specification
Ultimate elongation 1,000% minimum
Ultimate tensile strength 2,250 psi minimum
Peel adhesion 24 pli
Adhesive bond rating 5, best rating
Water vapor permeability 0.18 perms
Moisture absorption after seven-day submersion Less than 0.356%
Service temperature -40°F to 140°F
Solar reflectivity 87.75%
Thermal emittance 0.88/0.88
Solar Reflectance Index 111/87

These values position Topps Seal® as a high-performance alternative for roof restoration projects where movement, moisture, corrosion, and long-term durability are central concerns.

Close-up of a seamless white elastomeric coating bridging a repaired metal roof seam

Why Elongation Matters

A roof coating with high elongation can accommodate movement across the roof surface. This is especially important on metal roofs, where panels and seams respond to changing temperatures throughout the year.

Topps Seal® provides a minimum ultimate elongation of 1,000%. This level of flexibility helps the coating stretch across minor cracks, seams, and areas of thermal movement without immediately splitting.

The result is a continuous protective layer that helps block moisture, ultraviolet exposure, and oxygen from reaching vulnerable roofing materials.

High elongation also supports long-term flexibility. Topps Seal® is formulated as a rubber-based coating that maintains movement capability across a service temperature range of -40°F to 140°F.

Why Tensile Strength Matters

Elongation alone does not define coating performance. A material may stretch significantly but still lack the strength needed to resist tearing.

Topps Seal® combines its 1,000% minimum elongation with a minimum ultimate tensile strength of 2,250 psi. This combination helps the membrane remain flexible while resisting mechanical stress.

High tensile strength is valuable around:

  • Roof seams and transitions
  • Fasteners and penetrations
  • Areas exposed to maintenance traffic
  • Corrugated metal panels
  • Repaired rusted sections
  • Locations subject to wind uplift or impact
  • Substrates with recurring thermal movement

The combination of stretch and strength is one of the primary distinctions between SEBS rubber technology and many conventional coating systems.

Topps Seal® vs. Acrylic Roof Coatings

Acrylic coatings remain popular because they are economical, reflective, and generally easy to apply. They also provide a breathable water-based option for substrates where moisture vapor release is important.

However, acrylic systems have limitations in demanding commercial environments.

Acrylic coatings are water-based and can lose film thickness through weathering. Their elongation may also decline over time as the coating ages and experiences ultraviolet exposure, temperature swings, and repeated wetting.

Acrylics are also more vulnerable to cracking, re-emulsification, and performance loss when exposed to recurring ponding water. Many systems require recoating every few years, depending on exposure, application thickness, substrate movement, and maintenance conditions.

Topps Seal® provides a different performance profile:

  • 1,000% minimum elongation
  • 2,250 psi minimum tensile strength
  • 0.18 perms water vapor permeability
  • Less than 0.356% moisture absorption after seven-day submersion
  • Seamless rubber membrane construction
  • Protection against rust, moisture, and ultraviolet exposure

Acrylics may be appropriate for select applications. Topps Seal® is better suited to projects where maximum flexibility, moisture resistance, and mechanical strength are higher priorities.

Topps Seal® vs. Silicone Roof Coatings

Silicone coatings are recognized for their flexibility and resistance to standing water. They can be effective in specific ponding-water applications when properly specified and installed.

Their principal limitation is that flexibility does not always equal high tensile or tear strength. Silicone coatings may also attract dirt, lose reflectivity, and offer limited compatibility for future coating applications unless the next system is silicone-based.

Topps Seal® addresses the performance comparison through its balance of flexibility and strength.

The SEBS membrane provides a minimum tensile strength of 2,250 psi while retaining a minimum elongation of 1,000%. This allows the coating to move with the roof while resisting the tearing and mechanical damage that can affect lower-strength membranes.

Topps Seal® also provides strong adhesion, with a listed peel adhesion of 24 pli and an adhesive bond rating of 5, the best rating in the referenced product data.

The appropriate choice depends on the roof assembly, drainage conditions, substrate, and project specifications. Silicone may remain a practical option for certain ponding-water conditions, while Topps Seal® offers a more robust mechanical performance profile for roofs requiring both high movement capability and high tensile strength.

Editorial illustration showing a strong, highly extensible rubber membrane compared with thinner coating materials

Broad Substrate Compatibility

Topps Seal® is designed for use over a range of commercial and industrial roofing substrates, including:

  • Metal
  • Built-up roofing
  • Modified bitumen
  • PVC
  • EPDM
  • Polyurethane foam
  • Concrete

Proper surface preparation remains essential. Existing coatings, rust, dirt, loose material, and compromised areas must be evaluated and addressed according to project requirements and the manufacturer’s application instructions.

Topps Seal® supports roof restoration by creating a seamless layer rather than adding another series of exposed seams and joints. The coating helps protect against rust, moisture intrusion, and ultraviolet degradation.

Aerial view of a large commercial metal roof being coated in sections, showing bright white finished areas beside gray uncoated panels with applicators at work

A Topps Seal® application on a large commercial metal roof, showing bright white coated sections set against uncoated gray panels as the seamless membrane is applied.

Moisture Resistance and Cool-Roof Benefits

Topps Seal® develops quick moisture resistance within approximately one to four hours. Under conditions of 77°F and 50% relative humidity, the coating dries to the touch in approximately four hours.

Actual cure time depends on weather, application thickness, ventilation, humidity, and substrate conditions.

Its reflective performance also supports cool-roof objectives. Topps Seal® provides 87.75% solar reflectivity, thermal emittance of 0.88/0.88, and an SRI rating of 111/87.

The product meets ENERGY STAR® requirements and carries a Class A fire rating under ASTM E108 / UL 790. It also meets Miami-Dade County requirements, subject to the applicable system and installation specifications.

A Cost-Effective Alternative to Full Replacement

Topps Seal® is marketed for situations where a better roof is needed rather than a new roof. A properly evaluated coating system can extend the useful life of an existing roof while reducing the disruption associated with full replacement.

The product is marketed at approximately one-third the cost of a new roof, although actual project costs vary according to roof condition, access, preparation, repairs, labor, thickness, and system design.

For facility owners and managers, the value proposition includes:

  • Reduced replacement disruption
  • Extended roof service life
  • Protection from rust and moisture
  • Improved thermal reflectivity
  • Seamless membrane coverage
  • High movement capability
  • Strong resistance to tearing
  • Compatibility with multiple roof substrates

Topps Seal® has been used across all continents, including Antarctica, demonstrating its ability to support demanding environments when properly specified and applied.

Support for Roofing Distributors and Contractors

Topps Products Inc. provides the product platform, while Veteran Group Sales & Analytics connects roofing supply distributors, contractors, and commercial buyers across its service territories.

The agency supports product positioning, quotes, budgets, samples, partner development, and sales strategy for roofing and building-product companies. Its role is to help qualified buyers identify the right product opportunity and establish meaningful connections with customers.

Topps Seal® is intended for commercial and industrial use only. Project teams should review the current product literature, safety documentation, substrate requirements, and application instructions before specifying or installing the system.

Product and Project Information

Discuss a Better Roof Strategy

Topps Seal® gives commercial and industrial decision-makers a durable SEBS alternative when elongation, tensile strength, adhesion, and moisture protection all matter.

Veteran Group Sales & Analytics helps roofing supply distributors, contractors, and facility decision-makers discuss product fit, sales opportunities, and meaningful connections with customers.