Sashco calls themselves an “87 years-young family company” out of Colorado, and they’ve built their reputation on one simple idea: making premium performance products instead of “Good, Better, Best” product ranges. That philosophy shows up in their caulking and sealing solutions, particularly their tintable systems that solve real jobsite problems.
The eXact Color System Changes the Game
The eXact color 9.5 oz tintable acrylic latex caulk deserves attention because it solves the color-matching headache that drives callbacks. Mix in approximately 10ml of any water-based paint or stain, and you’ve got caulk that matches your finish exactly. No more painting over caulk lines. No more hoping the “almond” matches the customer’s trim.
The performance numbers back up the innovation:
| Specification | Value |
|---|---|
| Maximum Stretch | 100% |
| Recovery Rate | 96% in 5 minutes |
| Joint Movement at -15°F | 12.5% |
| VOC Content | 79.4 g/L |
| Tack Free Time | < 30 minutes |
| Full Cure | 4-5 days |
| Application Temperature | 40°F to 90°F |
That 12.5% joint movement capability at -15°F matters when you’re dealing with Montana’s temperature swings. Most caulks crack when joints move in cold weather. This one stretches and recovers.
The kit includes a syringe and thickener — everything needed to tint and apply without special equipment. Once mixed, it holds up to 1 year when stored properly, so contractors can mix batches for specific jobs without waste.
Where it works: wood, drywall, plaster, tile, brick, stucco, fiber cement, glass, metals (aluminum, brass, steel), plastics (PVC, vinyl, ABS, polycarbonate), stone, masonry, concrete, Formica, and Corian. That covers nearly every substrate you’ll encounter.
Where it doesn’t: water submersion areas, high traffic floor joints, or surfaces like Kynar, polypropylene, waxes, polyethylene, or silicone. Know the limitations.
Filler Rope That Actually Works
Sashco’s Filler Rope comes in 3/8”, 1/2”, and 3/4” diameters with a critical difference from standard backer rod — it’s soft and pliable instead of rigid. The closed-cell foam construction repels water while staying flexible enough to push into irregular joints without fighting you.
Key specifications:
| Size | Length | Features |
|---|---|---|
| 3/8” | 20 ft | Closed-cell, water-resistant |
| 1/2” | 100 ft | Prevents 3-point adhesion |
| 3/4” | 50 ft | Soft, pliable, grey color |
The foam prevents 3-point adhesion — the number one cause of sealant failure. When caulk sticks to the bottom of a joint plus both sides, it can’t move properly and tears. This backer rod ensures the sealant only bonds to the joint walls, allowing proper movement.
It’s designed for joints 1/4” wide and 1/2” deep or larger. The closed-cell structure means it won’t absorb your caulk like open-cell alternatives, giving you consistent joint depth and saving material.
Why Colorado Gets Montana
Founded in 1936 and still family-owned, Sashco manufactures everything in Brighton, Colorado. That high-elevation location means they understand UV damage, freeze-thaw cycles, and extreme temperature swings — the same challenges Montana contractors face daily.
Their focus on “high-performance formulations for specialized and conventional applications” shows in products tested for real-world conditions. That -15°F joint movement test isn’t theoretical — it’s based on what actually happens when the temperature drops.
The temperature service range from -30°F to 250°F after cure covers everything Montana can throw at a building. From January deep freezes to south-facing metal roof temperatures in July, these products keep working.
Sashco specializes in both log home products and conventional construction caulking. Their rejection of tiered quality levels means you’re getting their best formulation whether you’re sealing a log home or patching trim on a rental.
Frequently Asked Questions
Q: How much paint or stain do I need to tint the eXact Color caulk?
Approximately 10ml of any water-based paint or stain tints a full 9.5 oz cartridge. The kit includes a syringe for precise measurement and a thickener to maintain proper caulk consistency after adding the colorant.
Q: Can I use standard backer rod instead of Sashco’s Filler Rope?
You can, but you’ll fight it the whole way. Sashco’s version is soft and pliable compared to traditional rigid backer rods, making installation faster and more forgiving in irregular joints. The closed-cell construction that repels moisture prevents water problems behind your sealant.
Q: What’s the working time after tinting the eXact Color caulk?
Once mixed, the tinted caulk remains usable for up to 1 year when stored in cool, dry conditions. On the job, you’ve got a 30-minute tack-free time, giving you plenty of working time even in cold conditions.
Q: Does the tintable caulk work with oil-based stains?
No. The system requires water-based paint or stain. Oil-based products won’t mix properly with the acrylic latex base. Stick to water-based colorants for reliable results.
Q: What’s the actual stretch capability at Montana winter temperatures?
The caulk maintains 12.5% joint movement capability at -15°F. Combined with 100% maximum stretch elongation and 96% recovery in 5 minutes, it handles thermal movement without cracking when properly installed with appropriate joint design.
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