Commercial

420 OmniSeal™ Base/Ply

Self-Adhered, Modified Ply Sheet

Made with our industry-leading NEX® Polymer Modified (SBS 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 NEX® Polymer Modified 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 NEX® Polymer Modified 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 NEX Enhanced 70 mils ASTM D4601 Type II, ASTM E108 Class A & B, UL & Intertek Listed up to 25 years Yes
Self-Adhered NEX® Enhanced 55 mils ASTM D1970; FM Approved Up to Lifetime ASTM E108 Class A when paired with a Class A shingle
Self-Adhered NEX® Exceptional 138 mils ASTM D6163 Type I, Grade S; ASTM D1970; ASTM E108 Class A; Intertek CCRR-0333; UL & Intertek Listed; FM Approved Up to 30 years Yes
 
Application Method

Self-Adhered

Self-Adhered

Self-Adhered

Asphalt Technology

NEX

NEX®

NEX®

Tear Strength*

Enhanced

Enhanced

Exceptional

Thickness

70 mils

55 mils

138 mils

Testing Compliance

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

ASTM D1970; FM Approved

ASTM D6163 Type I, Grade S; ASTM D1970; ASTM E108 Class A; Intertek CCRR-0333; UL & Intertek Listed; FM Approved

Warranties+

up to 25 years

Up to Lifetime

Up to 30 years

Fire Resistance (FR)

Yes

ASTM E108 Class A when paired with a Class A shingle

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: 70 mils nominal

 

Testing Compliance

ASTM D1970
ASTM D4601
ASTM E108 Class A & B
ASTM D6163 Type I
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. The warranty packages available for systems using 420 OmniSeal™ Ply include 10, 15, 20, 25, and 30-year limited and unlimited coverage. Contact Malarkey’s Technical Services Department for approval of roof systems.

Warranties

Compare Products

  Application Method Asphalt Technology Tear Strength* Thickness Testing Compliance Warranties+ Fire Resistance (FR)
420 OmniSeal™ Base/Ply
Self-Adhered NEX Enhanced 70 mils ASTM D4601 Type II, ASTM E108 Class A & B, UL & Intertek Listed up to 25 years Yes
Self-Adhered NEX® Enhanced 55 mils ASTM D1970; FM Approved Up to Lifetime ASTM E108 Class A when paired with a Class A shingle
Self-Adhered NEX® Exceptional 138 mils ASTM D6163 Type I, Grade S; ASTM D1970; ASTM E108 Class A; Intertek CCRR-0333; UL & Intertek Listed; FM Approved Up to 30 years Yes
 
Application Method

Self-Adhered

Self-Adhered

Self-Adhered

Asphalt Technology

NEX

NEX®

NEX®

Tear Strength*

Enhanced

Enhanced

Exceptional

Thickness

70 mils

55 mils

138 mils

Testing Compliance

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

ASTM D1970; FM Approved

ASTM D6163 Type I, Grade S; ASTM D1970; ASTM E108 Class A; Intertek CCRR-0333; UL & Intertek Listed; FM Approved

Warranties+

up to 25 years

Up to Lifetime

Up to 30 years

Fire Resistance (FR)

Yes

ASTM E108 Class A when paired with a Class A shingle

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: 70 mils nominal

 

Testing Compliance

ASTM D1970
ASTM D4601
ASTM E108 Class A & B
ASTM D6163 Type I
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. The warranty packages available for systems using 420 OmniSeal™ Ply include 10, 15, 20, 25, and 30-year limited and unlimited coverage. Contact Malarkey’s Technical Services Department for approval of roof systems.

Warranties