ALL OUR BRANCHES WILL BE CLOSED AT 10AM ON OCT 31, 2025 FOR COMPUTER MAINTENANCE
Pro Fastening (PFS) is excited to share that we are now officially part of Triangle Fastener Corporation (TFC) family.
PFS is a trusted fastener supplier in the midwest and this now strengthens TFC's presence to 32 locations, 3 distribution centers, and 9 paint facilities nationwide - expanding our ability to deliver innovative, proprietary brands like CONCEALOR®, BLAZER, and APS500® to customers across North America.
The PFS website will remain active during this short transition to ensure uninterrupted service but will soon forward to www.TriangleFastener.com.
Thank you for your continued support! TriangleFastener.com


MasterSeal NP 125 is a one-component, high-performance, non-priming, gun-grade, thermoplastic adhesive and sealant. It requires no mixing and bonds tenaciously to common building materials, including concrete and clay roof tiles, metal flashings and masonry.
Available in cases of 12 tubes (10.1 oz tubes)

Open (soft) cell backer rod is a soft, gray, pliable non-gassing backup material for construction joints and applications that require sealants.
Available in multiple diameters and sold per hundred lineal feet

FillPro® Open Cell Backer Rod (formerly Tundra Foam) is a pliable open-cell polyurethane foam material used for filling irregular joints. It is chemically inert and will resist oil, gasoline and most other solvents. The material will not stain, or adversely adhere to sealant or caulking materials.
Available in multiple diameters and sold per hundred lineal feet

DOWSIL™ 791 Weatherproofing Sealant is a one-part, medium-modulus, neutral-curing silicone elastomeric sealant for weathersealing applications. It is available in multiple colors and cures to form a flexible and durable silicone rubber weatherseal joint for the building.
Available in cases of 12 cartridges (10.3 oz cartridges) or 16 sausages (20 oz sausage packs) in a variey of colors

DOWSIL™ 999A Silicone Glazing Sealant is an easily applied, one-part sealant that cures in the presence of atmospheric moisture to produce a durable and flexible glazing and curtainwall seal.
Available in cases of 12 cartridges (10.3 oz cartridges) in aluminum, black, bronze, clear, light bronze, white

DOWSIL™ 732 Multi-Purpose Sealant is a general-purpose acetoxy RTV sealant.
Available in cases of 12 cartridges (10.3 oz cartridges) in aluminum, black, clear, white

DOWSIL™ Contractors Weatherproofing Sealant is a one-part, moisture cure, medium modulus sealant that provides durable, flexible, watertight joints and offers outstanding unprimed adhesion to most non-porous substrates. It is specifically developed for sealing dynamically moving joints.
Available in cases of 12 cartridges (10.3 oz cartridges) or 16 sausages (20 oz sausage packs) in a variey of colors

Surebond SB-190 is a versatile, high-strength, one-part, hard-setting, pick-proof adhesive sealant. Superb tensile strength with excellent impact resistance. Water- and weather-proof.
Available in cases of 12 cartridges (10.3 oz cartridges)

Spectrem® 3 is a single-component, neutral-cure, low-modulus, construction grade sealant with patented silicone technology. Non-staining and low polar attraction to dirt increases aesthetic appearance. Spectrem 3 has a patented chemistry that has been specifically formulated to seal porous stone, EIFS, metal panels, masonry, and precast concrete joints.
Available in cases of 30 tubes (10.1oz tubes) or 15 sausages (20 oz sausage pack) in a wide variety of colors

Tremsil® 200 is a single-component acetoxy silicone sealant that cures to a flexible rubber when exposed to moisture present in the air, creating a weathertight seal.
Available in cases of 30 tubes (10.1oz tubes) in Aluminum, Black, Clear, Dark Bronze, Gray, and White

Dowsil 756 one-part, medium-modulus, neutral-curing silicone elastomeric sealant for weathersealing sensitive substrates where the aesthetic performance of the sealant is important. The sealant is intended for weathersealing skylights, glass facades, porous natural stone, and panel systems where staining and residue rundown streaking must be minimized. It is available in a variety of colors.
Available in cases of 16 sausages (20 oz sausage packs) in a variey of colors

DOWSIL™ 790 Silicone Building Sealant is a one-part, ultra-low-modulus, neutral-curing silicone elastomeric sealant for use in high-movement weathersealing applications. It has excellent primerless adhesion to concrete and most porous substrates and is available in a wide variety of colors.
Available in cases of 12 cartridges (10.3 oz cartridges) or 16 sausages (20 oz sausage packs) in a variey of colors