Description
The Stone Seam 5020 hardener ships in a 2 ounce clear pump dispenser as the catalyst half of Chem-Set’s Stone Seam acrylic adhesive system used for seaming granite, marble, and engineered quartz countertops. Fabricators pump a measured dose of the hardener into the base adhesive or pigment pump to trigger cure at the seam.
What the Stone Seam 5020 hardener does in the system
Stone Seam adhesive is a two-part acrylic system, and this component controls how fast the seam sets once the parts are combined. A pump-metered dose keeps the ratio consistent from seam to seam, which matters because too little hardener leaves a soft, slow-curing joint and too much shortens the open time before the fabricator can align and clamp the slabs. The clear formulation will not tint the finished seam color, so the visible shade comes entirely from whichever Stone Seam pigment pump is blended in alongside it, and Chemical Concepts also stocks the same hardener in a 4 ounce pump and a 1 gallon pail for higher-volume shops.
Working with the Stone Seam 5020 hardener on the job
Dispense the hardener into the working mix just before running the seam, since acrylic seam adhesive open time is short once combined. Keep the pump capped between uses and store the bottle at room temperature away from direct sun to protect shelf life. A 2 ounce dispenser is sized for shop restocking alongside the color pigment pumps rather than as a standalone bulk purchase, and fabricators running a single seam type at a time often keep both a fresh and a backup pump on the bench during a job.
Chemical Concepts carries the full Stone Seam hardener and pigment pump lineup in the specialty adhesives category. For seam mixing ratios and application demonstrations, see the Chemical Concepts YouTube channel. For questions on hardener ratios for a specific stone type, call (800) 220-1966 or email [email protected].
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