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Commercial

420 OmniSeal® Base/Ply

Self-Adhered, Modified Ply Sheet

Made with our industry-leading Polymer Modified (Rubberized) Asphalt, OmniSeal® Base/Ply is our premium, self-adhering, modified asphalt sheet for low-slope commercial roofing applications.

System Optionality

OmniSeal® Base/Ply is a modified asphalt sheet that is used as a base sheet to create a 2-3 layer multi-ply system that meets desired performance, cost, and warranty needs.

OmniSeal® System

Modified Asphalt Performance

OmniSeal® Base/Ply is constructed with our proprietary Polymer Modified (Rubberized) Asphalt, reinforced with fiberglass, to create a super strong, durable waterproof roof layer.

Self-Adhered Ease

OmniSeal® Base/Ply is a self-adhered membrane activated by direct sunlight, radiant heat, and applied pressure. Self-adhered roofing eliminates the use of torches and burning asphalt from the installation process.

Key Features

Modified Asphalt

Made with proprietary Polymer Modified (Rubberized) Asphalt for exceptional weathering and extra strength, flexibility, and durability to resist damage and last longer.

Self-Adhered

Sheet is self-adhered (adhesive is activated by direct sunlight and radiant heat, and applied with pressure). Self-adhered roofing eliminates potentially dangerous fire hazards and unpleasant odors from the low slope roofing process.

Multi-ply System

Can be combined with conventional or modified asphalt sheets to create multi-layer redundancy and satisfy performance need, cost, or warranty.

Strong & Durable

Modified asphalt sheets are reinforced with rubber and plastic polymers on a non-woven fiberglass mat. Combined with other sheets for redundancy, modified asphalt delivers greater tear strength than conventional built-up roofing membranes for extreme, lasting durability. Up to 240 mils thick in a 3-ply system, 6X thicker than common single ply roofing systems.

Waterproof System

Naturally waterproof asphalt, built into a multi-ply system, helps resist water penetration.

Faster Installation & Split Release

Self-adhered membranes have a factory-applied split-release film that protects the adhesive and is removed during installation.

Impact Resistant

Class 4 impact-rated when used as a system, the highest rating available from Underwriters Laboratory.

Enhanced Warranty

Enhanced warranties are available when product is used in a complete roofing system of Malarkey shingles and accessories, and installed by a Malarkey Certified Contractor.

Fire Resistance (FR)

Class A fire rated in a system assembly over a combustible or non-combustible deck.

Product Details

  Application Method Asphalt Technology Tear Strength Thickness Testing Compliance Warranties Fire Resistance (FR)
420 OmniSeal® Base/Ply
Self-Adhered Polymer Modified (Rubberized) Asphalt Enhanced 60 mils ASTM D1970; ASTM D4601; ASTM E108 Class A, B, & C; FM Approved; UL & Intertek Listed up to 17 years ASTM E108 Class A, B, & C
Self-Adhered NEX® Enhanced 65 mils ASTM D1970; FM Approved Up to Lifetime ASTM E108 Class A when paired with a Class A shingle
Mechanically Fastened Polymer Modified (Rubberized) Asphalt Enhanced 50 mils ASTM D4601 Type II; ASTM E108 Class A, B, & C; UL & Intertek Listed Up to 17 years ASTM E108 Class A, B, & C
Hot Asphalt Polymer Modified (Rubberized) Asphalt Enhanced 55 mils ASTM D4601 Type II; ASTM E108 Class A; Intertek CCRR-0333; UL Listed; FM Approved Up to 30 years Yes
 
Application Method

Self-Adhered

Self-Adhered

Mechanically Fastened

Hot Asphalt

Asphalt Technology

Polymer Modified (Rubberized) Asphalt

NEX®

Polymer Modified (Rubberized) Asphalt

Polymer Modified (Rubberized) Asphalt

Tear Strength

Enhanced

Enhanced

Enhanced

Enhanced

Thickness

60 mils

65 mils

50 mils

55 mils

Testing Compliance

ASTM D1970; ASTM D4601; ASTM E108 Class A, B, & C; FM Approved; UL & Intertek Listed

ASTM D1970; FM Approved

ASTM D4601 Type II; ASTM E108 Class A, B, & C; UL & Intertek Listed

ASTM D4601 Type II; ASTM E108 Class A; Intertek CCRR-0333; UL Listed; FM Approved

Warranties

up to 17 years

Up to Lifetime

Up to 17 years

Up to 30 years

Fire Resistance (FR)

ASTM E108 Class A, B, & C

ASTM E108 Class A when paired with a Class A shingle

ASTM E108 Class A, B, & C

Yes

420 OmniSeal Ply

Malarkey Roofing Products Roll Roofing

420 OmniSeal Ply Label

Malarkey Roofing Products Roll Roofing

Technical Specs

SKU: 420
L: 66′
W: 39-3/8″
SQ/Roll: 2
Thickness: 60 mils nominal

 

Testing Compliance

ASTM D1970
ASTM D4601
ASTM E108 Class A, B, & C
UL & Intertek Listed
FM Approved

Shipping Specifications

SQ/Roll: 2
Rolls/Pallet: 20
Rolls/Truckload: 600

PDF Documents

Videos

Warranty

Malarkey Roofing Products® offers various warranties to meet specific requirements. Contact your roofer, local distribution center or Malarkey’s Technical Services Department for full details.

Warranties

Compare Products

  Application Method Asphalt Technology Tear Strength Thickness Testing Compliance Warranties Fire Resistance (FR)
420 OmniSeal® Base/Ply
Self-Adhered Polymer Modified (Rubberized) Asphalt Enhanced 60 mils ASTM D1970; ASTM D4601; ASTM E108 Class A, B, & C; FM Approved; UL & Intertek Listed up to 17 years ASTM E108 Class A, B, & C
Self-Adhered NEX® Enhanced 65 mils ASTM D1970; FM Approved Up to Lifetime ASTM E108 Class A when paired with a Class A shingle
Mechanically Fastened Polymer Modified (Rubberized) Asphalt Enhanced 50 mils ASTM D4601 Type II; ASTM E108 Class A, B, & C; UL & Intertek Listed Up to 17 years ASTM E108 Class A, B, & C
Hot Asphalt Polymer Modified (Rubberized) Asphalt Enhanced 55 mils ASTM D4601 Type II; ASTM E108 Class A; Intertek CCRR-0333; UL Listed; FM Approved Up to 30 years Yes
 
Application Method

Self-Adhered

Self-Adhered

Mechanically Fastened

Hot Asphalt

Asphalt Technology

Polymer Modified (Rubberized) Asphalt

NEX®

Polymer Modified (Rubberized) Asphalt

Polymer Modified (Rubberized) Asphalt

Tear Strength

Enhanced

Enhanced

Enhanced

Enhanced

Thickness

60 mils

65 mils

50 mils

55 mils

Testing Compliance

ASTM D1970; ASTM D4601; ASTM E108 Class A, B, & C; FM Approved; UL & Intertek Listed

ASTM D1970; FM Approved

ASTM D4601 Type II; ASTM E108 Class A, B, & C; UL & Intertek Listed

ASTM D4601 Type II; ASTM E108 Class A; Intertek CCRR-0333; UL Listed; FM Approved

Warranties

up to 17 years

Up to Lifetime

Up to 17 years

Up to 30 years

Fire Resistance (FR)

ASTM E108 Class A, B, & C

ASTM E108 Class A when paired with a Class A shingle

ASTM E108 Class A, B, & C

Yes

Specifications & Testing

420 OmniSeal Ply

Malarkey Roofing Products Roll Roofing

420 OmniSeal Ply Label

Malarkey Roofing Products Roll Roofing

Technical Specs

SKU: 420
L: 66′
W: 39-3/8″
SQ/Roll: 2
Thickness: 60 mils nominal

 

Testing Compliance

ASTM D1970
ASTM D4601
ASTM E108 Class A, B, & C
UL & Intertek Listed
FM Approved

Shipping Specifications

SQ/Roll: 2
Rolls/Pallet: 20
Rolls/Truckload: 600

Documents & Resources

PDF Documents

Videos

Warranty Information

Warranty

Malarkey Roofing Products® offers various warranties to meet specific requirements. Contact your roofer, local distribution center or Malarkey’s Technical Services Department for full details.

Warranties