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All Categories > Fire Protection Products > Tremco > Devices > TREMstop MCR  
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TREMstop MCR is a metal restricting collar to be used in conjunction with TREMstop WS to provide a field-fabricated device to firestop combustible penetrations. TREMstop MCR is designed for use where the TREMstop WS/MCR system will be fabricated or where the TREMstop D is not desired. The primary purpose of the TREMstop MCR is to direct the intumescent action of the TREMstop WS inward to fill all voids created when combustible penetrations burn.TREMstop MCR is made of 28-gauge steel, permitting easy manipulation. It is zinc coated, reducing sharp edges. TREMstop MCR is available in two profile sizes to coordinate with the TREMstop WS.

Item #

Product Name


Unit Quantity


TRTSMCR.14 TREMstop MCR Metal Restricting Collar 1.4" x 25' Per Roll NA
TRTSMCR.24 TREMstop MCR Metal Restricting Collar 2.4" x 50' Per Roll NA


Tremco TREMstop MCR Data Sheet

Tremco TREMstop MCR MSDS