MasterLok-90 and MasterLok-FS Trapezoidal Panels

MasterLok-90 (also referred to as ML-90) is a snap together trapezoidal standing seam system designed for projects with slopes as low as 1/4:12. 

MasterLok-FS (also referred to as ML-FS) is a mechanically seamed trapezoidal standing seam system also designed for projects with slopes as low as 1/4:12. For seaming tool rental click here.  

Both panels are best suited for simple sloped roofs without dormers, hips, valleys or other special conditions. ML-90 and ML-FS can be installed over solid decking or substructural members.  

View an ML-90 installation animation

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Great for

Walls

Walls

Roofs

Roofs

Residential

Residential

Commercial

Commercial

MLFS panels are mechanically seamed.  Mechanical seamers and hand crimpers are available for rent through Developmental Industries (DI) at mcelroyseamers.com, a website created just for McElroy customers.

Specifications & Details

Details
Sealant Factory applied to improve weather-tightness
Minimum slope ML-90 1/4:12; ML-FS 1/4:12
Installation Can be over solid deck or open framing
MasterLok-FS Mechanically seamed system
MasterLok-90 Snap Together System
Note MoistureLok available on MasterLok-90
Note Oil Canning is a natural occurrence in metal panels and is not a cause for panel rejection
Testing
Fire Rating Class A
Uplift Test UL580 Class 90, ASTM E1592
Air Infiltration ASTM E1680
Water Infiltration ASTM E1646
Class 4 Impact Resistance UL2218
MasterLok-90 Florida State Approval 1832.2, 1747.1
MasterLok-FS Florida State Approval 8051.1
Testing Data For available Test Data, Section Properties or Load Tables, please visit our downloads section.
Panel Options
Panel Width 24"
Coating Kynar 500® (PVDF)
Substrate - Standard 24 GA Galvalume®
- Optional 22 GA Galvalume

Related Files

Color Charts & General Brochure

Product & Trim Information Books

Information Flyers

Good Design Practices

Technical Bulletins / ASTM E283 (Air) & ASTM E331 (Water)

Get A Submittal Package

MaskerLok-90 - 18"
Customize (Recommended)

Customize your submittal package MaskerLok-90 - 18"

Click on your desired documents below to select them for your package.

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

MaskerLok-90 - 24"
Customize (Recommended)

Customize your submittal package MaskerLok-90 - 24"

Click on your desired documents below to select them for your package.

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

MaskerLok-FS - 18"
Customize (Recommended)

Customize your submittal package MaskerLok-FS - 18"

Click on your desired documents below to select them for your package.

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

MaskerLok-FS - 24"
Customize (Recommended)

Customize your submittal package MaskerLok-FS - 24"

Click on your desired documents below to select them for your package.

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

Request

Samples & Color Charts

Request physical samples and color charts. All items will be sent out via UPS ground unless otherwise specified.

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fanned-color-swatches

Weathertightness Warranties

If your project requires a Weathertightness Warranty and you don’t already have a job specific Pre-Approval Form issued by McElroy Metal, click the button below to get started.

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Shop Drawing Service
Shop Drawing Service

Running short of time to complete your own shop drawings? McElroy Metal can help. Click the button below to provide us some basic information and we’ll be in touch soon to discuss your project specifics.

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Download Shop Drawings
Download Shop Drawings

If you’re creating your own shop drawings, click the button below to gain full access to our CAD and PDF Files.

View Drawings →

Find a Distributor/Contractor Near You

Whether you’re building a new home or planning renovations, a metal roof can deliver long-term cost savings and comfort. To explore your options and find the product that meets your aesthetic and budgetary needs, contact a McElroy Metal distributor or contractor in your area today. We can’t wait to help make your dream home a reality.

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