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ConcealFab has partnered with Johns Manville, a global leader in the roofing industry, to co-develop reliable roofing materials able to mitigate passive intermodulation at cell sites. These materials are particularly useful at reducing PIM on sites where the base station antennas are recessed from the building edge due to zoning restrictions.

PIM Shield™ roofing is a multiply Styrene-Butadiene-Styrene (SBS) modified bitumen roof membrane manufactured by Johns Manville and sold exclusively through ConcealFab. The material includes ceramic coated granules on the top surface for solar reflectivity and membrane protection. An internal PIM Shield™ layer bonded between two SBS modified bitumen layers forms a water-tight RF barrier able to provide decades of PIM protection. The material can be installed using industry standard hot asphalt, heat weld or cold adhesive processes. PIM Shield™ roofing complies with applicable ASTM standards and carries both UL and FM approvals.

To maintain an existing or to be eligible for a new JM Peak Advantage Guarantee, the PIM Shield™ roofing material must be installed by a JM certified contractor who is approved for SBS Modified Bitumen Roofing Systems. Please contact ConcealFab customer service or JM Technical Services for additional information related to roofing guarantees.

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