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241 Premium Modified Flashing Cement

241 Premium Modified Flashing Cement

A professional-grade, rubber-modified mastic designed for use as a cold-applied bonding agent in SBS modified bitumen roofing systems. A versatile performer, it can be used on all types of penetrations, on wet or dry surfaces, and in all weather conditions. Its flexibility and elasticity make it superior to standard plastic and flashing cements, particularly where there are moving joints.

  • Ideal for installing SBS modified bitumen membrane flashings to parapet walls, curbs, steep slopes, and roof penetrations.
  • Seals laps and perimeter edges of SBS modified bitumen roofing membranes.
  • Can be used on flashings around skylights and gutters and in crevices.
  • In repair applications only, it may be used as a topical application on smooth or granulated APP modified bitumen roofing products.
  • Repairs splits, breaks and small holes in asphalt-based roofing and flashings.
  • Seals joints of metal flashings and coping caps.
  • Can be used to install metal edge flanges and seal gutter seams, air-conditioning ducts and other metal joints.

System

ModBit
M&R
  • Highly flexible to accommodate the temperature-related expansion and contraction of the roofing system
  • Heavy, trowel-grade consistency
  • Great bonding strength
  • Exceptional durability and performance over a wide range of challenging temperatures and weather conditions. Will not mud crack and will remain highly resilient and durable through all seasons
  • Interlocking fiber matrix ensures uniform, excellent adhesion
  • Excellent sag resistance when used on vertical surfaces, even at high temperatures
  • Does not damage conventional asphalt-based roofing membranes
  • Meets Miami-Dade-County Standards

Documents

PDS 241 Premium Modified Flashing Cement
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SDS 241 Premium Modified Flashing Cement
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Florida Product Approval - Cements, Adhesives, Coatings
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Miami-Dade NOA - Asphalt Products NOA
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Asphalt Cements & Coatings Cross Reference Chart
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Maintenance & Repair Brochure
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Mod Bit Pocket Guide
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Mod Bit Pocket Guide (Spanish)
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Sell Sheet - 241 Premium Modified Flashing Cement
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Options

Item ID Description Packaging Qty per Ctn Weight per Ctn Cover Rate
16MH2413 MH 241 PREM. MOD. FLASHING CEMENT 3 GAL Metal Pail 1 32 8 gallons per 100 sq. ft. for 1/8"
16MH2415 MH 241 PREM. MOD. FLASHING CEMENT 5 GAL Metal Pail 1 51 8 gallons per 100 sq. ft. for 1/8"
16MH2413W MH 241 PREM. MOD. FLASHING CEMENT 3 GAL - WINTER GRADE Metal Pail 1 32
16MH2415W MH 241 PREM. MOD. FLASHING CEMENT 5 GAL - WINTER GRADE Metal Pail 1 51

FAQs

Mule-Hide #241 Premium Modified Flashing Cement differs from #231 in that it is polymer-modified, meaning it is more flexible and higher-performing in low-sloped commercial applications than #231. #241 differs from #251 in that #241 is NOT intended for use in wet applications and is contains different types of polymer modifiers. #241 is specifically designed for use with modified bitumen membranes, base sheets and ply sheets. The modified properties provide excellent adhesion, elongation and recovery characteristics. Contractors seeking a refined and premium, modified asphalt flashing cement choose this product for commercial, low-sloped or steep-sloped roofing applications.

The coverage rate for Mule-Hide #241 Premium Modified Flashing Cement is approximately 8 gallons per 100 sq. ft. for a 1/8-inch (3 mm) coat applied to both surfaces. (All values are approximate and may vary with ambient temperature and job conditions.)

Mule-Hide #241 Premium Modified Flashing Cement can be applied using a pointed trowel, a wide-edged putty knife, or a gloved hand.

No. Mule-Hide #241 Premium Modified Flashing Cement is NOT TO BE USED to adhere APP modified bitumen roofing membranes. In repair applications only, it may be used as a topical application on smooth or granulated APP products.

No. DO NOT USE Mule-Hide #241 Premium Modified Flashing Cement with PVC, TPO, EPDM or other single-ply roofing membranes.

With proper storage, the shelf life of Mule-Hide #241 Premium Modified Flashing Cement is 24 months from the date of manufacture.

Mule-Hide #241 Premium Modified Flashing Cement 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 application.

Mule-Hide #241 Premium Modified Flashing Cement should only be applied when the ambient temperature is at least are 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.