Description
The Chem-Set 741K mounts undermount sinks to solid surface, quartz, and engineered stone without drilling into the countertop. The 1-1/2 inch stud base bonds to the underside of the top with the included 605 Quick Set Acrylic, then the Z-shaped sink clip, flat washer, and wingnut carry the sink. 605 is a two-part methacrylate that dispenses as a non-sagging gel and builds strength fast, reaching 1,000 psi in 15 minutes at room temperature. This version ships with a 50ml cartridge, a Pak-50 dispense gun, and static mixers.
Kit Contents
| Qty | Item | Component SKU |
|---|---|---|
| 1 | Chem-Set 605 Quick Set Acrylic, 50ml cartridge | CCA605-50CL |
| 4 | M1-RB38 glue-on studs, 1/4-20 x 0.75 in | CCH-M1B38-1/4-20 |
| 4 | Z-Shaped stamped metal sink clips | CCH732G |
| 4 | Stamped wingnuts, 1/4-20 thread | CCH730S |
| 4 | Flat washers, 1/4-20 thread | CCH731 |
| 1 | Pak-50 50ml dispense gun | CCH50G |
| 2 | 50ml 1:1 static mixers | TAH190-620 |
| 1 | Printed installation instructions |
Installation Steps
- Place the 50ml cartridge into the dispense gun without the static mixer attached. Dispense a small amount until both sides come out at the same time, then attach the mixer and dispense a 6 to 8 inch bead onto scrap material to purge the cartridge.
- Clean the area to be bonded and the base of the glue-on fastener with alcohol. Both surfaces must be clean and dry for good adhesion.
- Apply 605 Acrylic to the base of the glue-on fastener and set it in position on the underside of the countertop around the sink cut-out. Position the fastener before the 3 to 6 minute working time expires.
- Leave the fastener undisturbed until fixture time is reached. Allow 45 minutes to 1 hour before hanging the bowl and putting weight on the anchor.
- Once the adhesive reaches handling strength, place the sink into position, mount the Z-shaped sink clip onto the fastener, add the washer, then tighten with the wingnut.
Full instructions are included in every kit and available as a download above.
Cure Timeline
| Stage | Time at 74°F |
|---|---|
| Working Time | 3 to 6 minutes |
| Fixture Time | 12 to 15 minutes |
| 500 psi Reached | 12 minutes |
| 1,000 psi Reached | 15 minutes |
| Ready to Hang the Sink | 45 minutes to 1 hour |
Key Product Details
| Property | Value |
|---|---|
| Kit SKU | CCH741K |
| Adhesive Included | Chem-Set 605 Quick Set Acrylic, 50ml cartridge |
| Adhesive Type | Two-part methacrylate (MMA) |
| Mix Ratio | 1:1 by volume and weight |
| Mixed Consistency | Non-sagging gel |
| Component Viscosity | 40,000 to 70,000 cP |
| Tensile Strength | 3,000 to 4,000 psi (ASTM D638) |
| Lap Shear Cohesive Strength | 3,000 to 3,800 psi at 0.012 in gap (ASTM D1002) |
| Gap Filling | 0.012 in to 0.125 in |
| Operating Temperature | -67°F to 250°F |
| Application Temperature | 65°F to 85°F |
| VOC During Cure | Less than 10 g/L |
| Certification | GREENGUARD Gold, UL 2818 |
| Shelf Life | 13 months |
| For Use On | Solid surface, quartz, engineered stone |
| Anchor Sets | 4 |
| Stud Base | 1-1/2 in (38mm) round |
| Storage | 55°F to 77°F |
Working Notes
- Working time is 3 to 6 minutes, so dispense and place each stud before moving to the next one rather than dispensing for all four at once.
- After the working time expires, leave the fastener undisturbed until fixture time is reached. Moving it in between costs bond strength.
- Non-sagging gel consistency holds position on the underside of the top rather than running off the stud base during set.
- Apply between 65°F and 85°F. Colder slows the cure significantly and hotter speeds it up, which matters on winter and summer jobsites.
- Clean up before the adhesive cures. Soap and water works, as do citrus terpene or NMP-based cleaners. Cured material has to be scraped.
- Burp the cartridge until both sides come out uniform before attaching the mixer, so no air is pulled into the mix.
- GREENGUARD Gold certification and VOC under 10 g/L support use on schools, healthcare, and other projects with indoor air quality requirements.
Common Applications
- Undermount kitchen sink installation on quartz and engineered stone
- Solid surface and Corian sink mounting
- Bathroom and vanity sink mounting on solid surface
- Sink remounts and field repairs
- Projects with indoor air quality or low-VOC requirements
Available Sizes or Variants
Related Products
- Chem-Set 743K Quartz & Solid Surface Sink Anchor Kit – 25ml Syringe
- Chem-Set 740K Natural Stone Sink Anchor Kit – 50ml Cartridge
- Chem-Set 755K bulk glue-on anchor hardware, 100 sets
- Chem-Set 605 Quick Set Acrylic, sold separately
- TAH190-620 replacement static mixers for 50ml cartridges
- Chem-Set CCH732G Z-Shape sink clips
- Glue-On Undermount Sink Anchors collection
- Glue-On Undermount Sink Installation Guide
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