A family-owned maker of sealants and stains for windows, logs, siding and other exterior and interior surfaces.
Sashco is a family-owned company that makes sealants and stains for homes. Its products include flexible caulks for joints between windows and siding, trim and masonry, and finishes for wood. Sealant matters most where materials meet and move, which describes the border of nearly every window.
We are an independent contractor and pick the sealant that suits each joint, the surface and the climate. We remove failed material, clean the joint, add backer rod when the gap is deep and tool a neat bead. If wood trim needs a finish as well, we discuss stain or paint options with you.
Visit the official Sashco website
Made for joints that expand and contract.
Suited to windows, siding and trim.
Stains and finishes for wood surfaces.
The company is family-owned.
Clean joints and backer rod help a seal last.
Product choice depends on the materials.
Window Sash ReplacementReplace a damaged or worn sash inside your existing frame, keeping the frame and trim and refreshing the…Explore 
Window Balance ReplacementNew spring or cord balances so double-hung windows lift easily and stay open instead of slamming down.Explore 
Stuck or Painted-Shut Window RepairFree windows that will not open because of paint, swollen frames or dirty tracks, without damaging the sash.Explore 
Drafty Window RepairFind where air leaks in around windows and fix it with seals, caulk, foam and adjustments.Explore 
Exterior Capping and WrapAluminum capping or wrap around exterior window trim, for a clean, low-maintenance finish that sheds water.Explore 
Window Insulation and Air SealingLow-expansion foam and sealant in the gap around the frame, closing a path for drafts and energy loss.Explore 
Window Sill and Frame RepairRepair soft, cracked or rotted sills and frames with wood replacement, fillers and primers, saving original windows.Explore Check problems, pick a style or ballpark a budget.
Window Problem Checker: What Is Wrong?Pick what you see or hear from a window to get likely causes, what to do first and the service page that fits.Try it 
Window Style PickerAnswer a few questions about your home, rooms, ventilation and view to see which window styles usually fit best.Try it 
Window Replacement Budget PlannerPick a window type or repair, set the quantity and add extras to see a ballpark planning range for your project.Try it Many owners check every year and reseal when caulk cracks or pulls away.
Paintable caulk can be painted. Some sealants are meant to stay as they are.
No. We are an independent window company, and Sashco is a trademark of its owner. We work with many brands and are glad to install the product you prefer.
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