Sashco at Spectra Pro Supply
What we carry from Sashco, at our stores in Carbondale, Basalt, Silverthorne and Breckenridge.
About Sashco
Sashco is a Colorado family-owned manufacturer of caulks, sealants and log home stains, and its company page says it has been in business since 1936. Contractors pick Sashco when a joint has to move: Big Stretch for siding, trim and windows, Lexel for kitchens and baths, Through the Roof! for leaks, Mor-Flexx for stucco and mortar, and Log Jam, Conceal and Capture for log homes.
Our catalog lists Sashco Big Stretch. Ask the store nearest you about Lexel, Through the Roof!, Log Jam, Conceal, Mor-Flexx and Capture, because stock varies by location.
What Spectra carries from Sashco
Our catalog lists 1 Sashco product line across caulk, fillers & compounds, including Sashco Big Stretch Caulk. Stock varies by store, so call to confirm the product, size and sheen before you visit.
Where to find Sashco near Aspen and in Summit County
Our Carbondale and Basalt stores serve the Roaring Fork Valley, and Basalt also serves Aspen and Snowmass. Our Silverthorne and Breckenridge stores serve Summit County. Spectra Pro Supply offers pro and contractor accounts for painters, builders and designers, so ask the store nearest you or read about the contractor program.
Manufacturer information: Sashco.
Sashco sealants, caulks and log home products
Descriptions below come from Sashco's own product pages. Stock, colors and sizes vary by store, so call before you visit. This site does not list prices or take orders.

Big Stretch
Sashco describes Big Stretch as a professional-grade elastomeric sealant for residential building and remodeling, with flexibility, elasticity and adhesion that let it move with the house. It is listed for windows, doors, siding, vents, trim, soffits, eaves and crown moulding, with up to 500% maximum stretch.
- Not for roofs, high foot or vehicle traffic, or under water
- Many colors, including White, Clear, Almond, Tan and Woodtone

Lexel
Sashco calls Lexel the tough elastic sealant for every job. It seals around tubs and showers, sinks and countertops, window and door frames, PVC and metal drain pipes, indoors and out, on wet or dry surfaces. Sashco says it handles up to 747% joint movement and that clear Lexel is 19 times clearer than silicone and will not yellow or cloud.
- Paintable and scrubbable
- Clear and White

Through the Roof!
A co-polymer rubber elastomeric sealant for roofers and contractors who need to seal leaks asphalt cannot, including in wet conditions. Sashco lists it as UV-resistant, crystal clear and paintable, for flashing, vent pipes, skylights, gutters, chimneys, glue-down shingles and roof tiles.
- Not for EPDM rubber roof membranes
- Clear, White and Black

Log Jam Chinking
Synthetic chinking for log and wood homes, in new construction or a refresh of an older home. Sashco calls its formula the log chinking industry's recognized standard for synthetic chinking. It is textured to simulate old-time mortar and stretches up to 250% to keep weather and bugs out.
- Interior and exterior log and wood joints
- 30 oz. cartridges and 5 gal. pails

Conceal Textured Caulk for Wood
An elastic, lightly textured caulk made to blend into wood grain so you see wood, not caulk lines. Sashco lists it for log checks and cracks, wood siding butt joints, around wood doors and windows, corner boards, baseboards and crown molding, in colors that match log home stains.
- Interior and exterior wood
- 10.5 oz. and 30 oz. cartridges and 5 gal. pails

Mor-Flexx
Mortar and stucco repair in a caulk tube. Sashco says Mor-Flexx is textured like mortar and stretches like rubber, stays elastic, cleans up with water and can be painted. It is listed for mortar, stucco, stone, faux stone and tile.
- Not for concrete under 6 months old, under water, or high foot or vehicle traffic
- Gray, White, Beige, Charcoal and Ironstone

Capture Log Stain
A VOC-compliant log home stain that Sashco says is safe to use indoors and out and will not crack, peel or blister. It is made for log homes, timber frame homes, wood siding, log and wood handrails, and Sashco pairs it with Cascade exterior clear coat.
- Not for walking surfaces such as decks, floors and stairs
- Sold in 1 gal. and 5 gal. pails
Images: Sashco
Sashco product lines
- Sashco Big Stretch CaulkCaulk, fillers & compounds
Find a store near you
Call to confirm Sashco products and sizes. Pro and contractor accounts are available.
Frequently asked questions
- Where can I buy Sashco near Aspen?
- Our Basalt store at 133 Park Ave serves Aspen and Snowmass. Call (970) 279-5738 to ask about Sashco products and availability.
- Where can I buy Sashco in Summit County?
- Our Silverthorne store at 795 Blue River Pkwy ((970) 423-2991) and our Breckenridge store at 0056 County Road 450 ((970) 423-6664) serve Summit County. Call the store first to confirm the product and size you need.
- Do you carry Sashco in the Roaring Fork Valley?
- Ask at our Carbondale store, 2401 Dolores Way ((970) 963-8699), or our Basalt store ((970) 279-5738). Stock varies by location, so call before you go.
- Can I order Sashco products on this website?
- No. This page shows what Spectra Pro Supply carries and does not take orders or list prices. Call or visit a store, and ask about a pro account if you buy regularly as a contractor.
- What is Sashco Big Stretch used for?
- Sashco lists Big Stretch for windows, doors, siding, vents, trim, soffits, eaves and crown moulding. It says Big Stretch is not for roofs, high foot or vehicle traffic, or areas under water. Ask at the store for the color you need.
- What is the difference between Sashco Big Stretch and Lexel?
- Sashco lists Big Stretch for exterior building joints such as windows, doors, siding and trim, in many colors. It lists Lexel for tubs, showers, sinks, countertops and window and door frames, indoors and out, in Clear and White. Read the label and ask a store which fits your joint.
- Which Sashco products are made for log homes?
- Sashco makes Log Jam chinking, Conceal textured caulk for wood and Capture log stain, with Cascade as the exterior clear coat. Ask a store about colors and sizes.
