121 Asphalt Primer

Name: 121 Asphalt Primer
Brand: MuleHide

A general-purpose penetrating asphalt primer used to promote adhesion prior to the application of hot-mopped, cold-applied and self-adhesive membrane systems, as well as roof cements, mastics and asphalt-based adhesives.

System

ModBit

M&R

Designed to be used on smooth surfaced built-up roofs, polymer-modified (APP, SBS) bituminous membranes, and roll-roofing membranes as a protective coating
DO NOT USE with PVC, TPO, EPDM or other single-ply membranes
Can be used as a protective surface for metal roofing, masonry, stucco, parapet walls, curbs and base flashings

Options

Item ID	Description	Packaging	Qty per Ctn	Weight per Ctn	Cover Rate
16MH12114	MH 121 ASPHALT SPRAY PRIMER 14 oz 30/CT	Spray Can	30	37	30 sq. ft. per can
16MH1215	MH 121 ASPHALT PRIMER 5 GAL	Metal Pail	1	41	1 gallon per 100 sq. ft.
16MH12150	MH 121 ASPHALT PRIMER 50 GAL	Drum	1	408

Videos

Self-Adhering Mod Bit: 10-Year Drip Edge

Self-Adhering Mod Bit: 10-Year Wall Flashing

Self-Adhering Mod Bit: 15- & 20-year Drip Edge

Self-Adhering Mod Bit: 15- and 20-Year Wall Flashing

Self-Adhering Mod Bit: Curb Flashing

Self-Adhering Mod Bit: Hot Stack

Self-Adhering Mod Bit: Inside Corners

Self-Adhering Mod Bit: Outside Corners

Self-Adhering Mod Bit: Pipe Flashing with Lead Sleeve

Self-Adhering Mod Bit: Roof Drain

FAQs

Mule-Hide #121 is a solvent-based bond coat and penetrating sealer for priming most surfaces prior to application of cold applied or hot mopped asphalt coatings, roof cements, adhesives, asphalt damp proofing and waterproofing. Not recommended as a stand-alone roof coating.

Application range is between 0.5-1.0 gallons per 100 sq. ft. depending on surface porosity.

Apply a thin, single coat of#104 over the entire surface with a roller or heavy-duty spray equipment. Brush out any excess immediately after application. Avoid over-application and build-up of surface film. Allow to dry thoroughly before applying adhesives or coatings. Store primer in a warm room overnight before using in cold weather.

#121 Asphalt Primer dries in approximately 2-24 hours in warm, dry weather. Drying time varies with weather conditions.

No, DO NOT use #121 Asphalt Primer on PVC, TPO, EPDM or other single-ply membranes.

With proper storage, the shelf life of Mule-Hide #121 Asphalt Primer is 24 months from the date of manufacture, for bucket goods. Aerosol cans may leak propellant over time, leading to a shortened shelf life of only 12 months. Store primer in a warm room overnight before using in cold weather.

#121 Asphalt Primer should be stored at a temperature of at least 45°F but not above 120°F. It should be stored at room temperature for at least 24 hours prior to use.

#121 Asphalt Primer should only be applied when the ambient temperature is at least 45°F and rising. Cold weather can result in uneven application and improper curing, and it will cause the product to stiffen, making application more difficult. Application is not recommended if the substrate temperature is above 140°F.

121 Asphalt Primer

System

Documents

Details

Options

Videos

FAQs

121 Asphalt Primer

System

Documents

Data Sheets

Codes / Approvals

Marketing / Bulletins / Guides

Details

Base Attachment

Corners

Curbs / Walls

Drainage

Expansion Joints

General

Pipes / Projections

Roof Edge

Seams

Tie-ins

Options

Videos

FAQs

What are the benefits/drawbacks of Mule-Hide #121 Asphalt Primer? What are the appropriate applications?

What is the coverage rate for Mule-Hide #121 Asphalt Primer?

How is Mule-Hide #121 Asphalt Primer applied?

What is the drying time for Mule-Hide #121 Asphalt Primer?

Can Mule-Hide #121 Asphalt Primer be used on single-ply roofing systems?

What is the shelf life of Mule-Hide #121 Asphalt Primer?

At what temperature should Mule-Hide#121 Asphalt Primer be stored?

What is the temperature range within which Mule-Hide #121 Asphalt Primer can be applied?

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