Siding J-Mold

Trim Purpose

Specs, MSDS, and LEED Information for Flannery Trims & Products

Flannery’s Siding J-Mold is a termination trim for siding that allows the siding to terminate against a dissimilar wall or material. By using the Siding J-Mold you can maintain a nice clean flow of the siding and avoid any rough edges from disrupting the aesthetics of the wall system. The trim comes with a 1″ face flange, which allows the installer to slide the siding in behind the flange and cover any unfinished edges. The larger leg of the Siding J-Mold also allows for the possible expansion or contraction of the siding along a horizontal run.

Manufacturer's Specifications

Flannery’s Siding Trims are standard extruded aluminum alloy 6063 T5 and have a .050” nominal wall thickness. Aluminum panel trims come in 10′ lengths and shall have a standard Clear Anodized Finish. Mill Finish (for field priming & painting), Chem-film finish or other factory finishes and custom paint orders are available. Flannery has a limited stock of factory paint colors to match Trugrain made with Resysta stains, please call for availability.

You can view our factory finishes to see if we have what you are looking for or if you do not see the finish, you are looking for, chances are we can color-match it or we already have it! Flannery Trim wants to always make sure we can get you the right look and feel for your building project.

Part No. “A” Width “B” Width Compatible Siding Stock Item Downloads
SJM 625-100 5/8″ 1″ TGR 1/2″ Siding Flatboard Yes DWG - Siding J-MoldPDF - Siding J-Mold
SJM 875-100 7/8″ 1″ TGR 3/4″ Hollow Board Yes DWG - Siding J-MoldPDF - Siding J-Mold
SJM 1125-1250 1-1/8″ 1-1/4″ TGR 12″ Commercial Siding Yes DWG - Siding J-MoldPDF - Siding J-Mold
nt1hfhkd 300x194 - Siding J-Mold

Installation of Siding Trims must be in accordance with the Siding Manufacturer’s Instructions. For TruGrain made with Resysta Siding’s installation instructions, please visit their website,

02 details 2 Siding J Mold Install Detail Rev 3 1000 BjB 1 - Siding J-Mold