Home / Materials / Model Ultra HT Wind & Water Seal® is a nominal 45-mil thick
Model Ultra HT Wind & Water Seal® is a nominal 45-mil thick This is a listed roofing assembly. Listing 8180-2433:0001. This site cites cal-fire-bml. Match the model and orientation. A listing is not a permit.
Listed · multiple independent channels. Active CAL FIRE BML listing 8180-2433:0001, expires 2027-06-30 (verified against the live BML 2026-08-25). Multiple independent channels agree; each is shown below.
▲ CAL FIRE BML 8180-2433:0001 · active ▲ ICC-ES ESR-1737 · active
Status derived from the cited listings by a published rule, never hand-assigned. Each chip
above is one evidence channel and its direction. A listing is not a permit — the authority
having jurisdiction decides.
MFM Building Products listing 8180-2433:0001 in OSFM category 8180 (non-wood roof covering/assemblies for wildland urban interface (w.u.i)). Model Ultra HT Wind & Water Seal® is a nominal 45-mil thick, self-adhering underlayment constructed of cross-laminated polyethylene, and asphalt adhesive.
Kind: listed-assembly.
Brand: MFM Building Products . Listing evidence: OSFM WUI handbook 2026-08-25.
Page reviewed 2026-08-26. JSON (CC BY 4.0)
Documented attributes Each value below points to its field-level manufacturer, official-listing, test-report, or standard-body evidence.
Program ID / source Evidence date Expires Status CAL FIRE BML 8180-2433:0001 · Search BML for 8180-2433:0001 2026-08-25 2027-06-30 listed ICC-ES ESR-1737 · Record 2026-08-24 listed
Models named on the listing Model Application Ultra HT Wind & Water Seal®
The live BML record names no test protocol in its description; confirm the test standard and exact models on GOVmotus before specification. OSFM listing is not a permit. The authority having jurisdiction decides. Can I use this here
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Model Ultra HT Wind & Water Seal® is a nominal 45-mil thick. FireApproved. https://fireapproved.com/materials/mfm-building-products-model-ultra-ht-wind-water-seal/. Last verified 2026-08-26. Verify at the source. Every listing number and claim here links to its origin — listings change and local amendments govern, so check the current record before you specify.