Description
The Chem-Set 742K mounts undermount sinks to natural stone without drilling into the countertop. The 1-1/2 inch stud base bonds to the underside of the top with the included 633 Epoxy Gel, then the Z-shaped sink clip, flat washer, and wingnut carry the sink. This version ships with a 25ml hand syringe and mixing supplies instead of a cartridge and gun, so no dispensing equipment is needed. It suits jobsite work, smaller shops, and crews who would rather not carry a gun.
Kit Contents
| Qty | Item | Component SKU |
|---|---|---|
| 1 | Chem-Set 633 Epoxy Gel, 25ml hand syringe | CCA633-25 |
| 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 |
| 2 | F1-CT38 dishwasher fasteners, 10-32 thread | CCH-F1CT38-10-32 |
| 2 | 3/16 in Phillips screws for dishwasher clips | CCH735P |
| 2 | Wooden mixing sticks | CCH-MIXSTICK |
| 2 | Polypropylene mixing cups | CCS-MIXCUP-04 |
| 1 | Printed installation instructions |
Installation Steps
- Remove the cap and push adhesive out in equal amounts into the provided mixing cup. Mix thoroughly with the mixing stick for one full minute until the color is completely uniform.
- 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 633 Epoxy to the base of the glue-on fastener and set it in position on the underside of the countertop around the sink cut-out.
- Allow the adhesive to set. The gel skins over and hardens in about 5 minutes, but wait 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 72°F |
|---|---|
| Working Time | 4 to 7 minutes |
| Skins Over and Hardens | About 5 minutes |
| Fixture Time | 10 to 15 minutes |
| Ready to Hang the Sink | 45 minutes to 1 hour |
| Full Cure | 48 hours |
Key Product Details
| Property | Value |
|---|---|
| Kit SKU | CCH742K |
| Adhesive Included | Chem-Set 633 Epoxy Gel, 25ml hand syringe |
| Adhesive Type | Two-part epoxy gel, thixotropic |
| Mix Ratio | 1:1 by volume and weight |
| Color | Opaque |
| Mixed Viscosity | Gel |
| Lap Shear Strength | 2,500 psi at 0.010 in bondline, cured 7 days at 75°F |
| Gap Fill | Up to 0.250 in |
| Shore Hardness | 80 Shore D |
| Service Temperature | -40°F to 200°F |
| For Use On | Granite, marble, concrete, wood |
| Anchor Sets | 4 |
| Stud Base | 1-1/2 in (38mm) round |
| Dispensing | Hand syringe, no gun required |
| Storage | Cool, dry place |
Working Notes
- Mix for a full minute before applying. Working time is 4 to 7 minutes total, so the mixing minute is part of your window, not on top of it.
- The kit includes two cups and two sticks, which supports mixing in two batches of two anchors rather than trying to place all four from one batch.
- The gel skins over in about 5 minutes, so have the bonding areas already cleaned and the studs ready before you mix.
- Non-sagging gel consistency holds position on the underside of the top rather than running off the stud base during set.
- Gap fill to 0.250 in helps on tops with an uneven or textured underside where the stud base will not sit perfectly flat.
- No dispense gun, cartridge, or nozzles to carry, which makes this the better choice for service calls and single-sink jobs.
Common Applications
- Undermount kitchen sink installation on granite and marble
- Bathroom and vanity sink mounting on natural stone
- Dishwasher bracket mounting without drilling the underside of the top
- Concrete countertop sink mounting
- Jobsite installs, service calls, and sink remounts
Available Sizes or Variants
Related Products
- Chem-Set 740K Natural Stone Sink Anchor Kit – 50ml Cartridge
- Chem-Set 743K Quartz & Solid Surface Sink Anchor Kit – 25ml Syringe
- Chem-Set 755K bulk glue-on anchor hardware, 100 sets
- Chem-Set 633 Epoxy Gel, sold separately
- Chem-Set CCH732G Z-Shape sink clips
- Glue-On Undermount Sink Anchors collection
- Glue-On Undermount Sink Installation Guide
Reviews
There are no reviews yet.