- Sku: 3120
- Vendor: Seachem
Seachem CoralCrete
Two-part epoxy putty that locks coral and rockwork in place. Seachem CoralCrete is a reef-safe bonding putty for securing coral frags to rock and plugs, or for fusing rockwork into a stable aquascape. You get about 5 minutes of working time, then it fully cures underwater or in air within 24 hours. It is ideal for heavier frags, branching corals, and large-polyp stony corals, and it works in freshwater, marine, and reef aquariums.
Pair it with Seachem Reef Glue for a fast-tack super glue plus epoxy combo, and browse our corals to mount.
Why CoralCrete
- Strong two-part bond that holds larger, heavier frags and rock that thin glues cannot.
- Five-minute working time, enough to position carefully before it sets.
- Cures underwater or in air, fully hardening within 24 hours.
- Reef safe for corals, invertebrates, and fish.
- Freshwater and saltwater, use it for reef frags or freshwater hardscape.
Choose Your Color
| Color | Best for |
|---|---|
| Grey | Blends with natural live rock and dry rock |
| Purple | Matches synthetic reef rock and coralline algae |
Each color comes in 2 oz and 4 oz sizes. Choose 2 oz for occasional frag mounting and 4 oz for larger aquascaping projects.
How to Use
- Cut off equal parts of the two-tone putty and knead it until the color is uniform.
- Press the putty onto the base of the frag, or into the joint between the rocks you are joining.
- Hold it in place for a minute, then leave it to fully cure over the next 24 hours.
Tip: wet your fingers first to keep the putty from sticking to your hands while you work.
Specifications
| Product | Two-part epoxy putty adhesive |
| Colors | Grey and Purple |
| Sizes | 2 oz and 4 oz |
| Working time | About 5 minutes |
| Full cure | Within 24 hours, submerged or in air |
| Best for | Coral frags, branching and LPS corals, rockwork |
| Compatibility | Freshwater, marine, and reef |
Recommended Pairings
- Seachem Reef Glue for fast-setting super glue to tack frags before the epoxy cures.
- Seachem Flourish Epoxy for planted-tank hardscape bonding.
- Browse our corals and saltwater livestock.
Frequently Asked Questions
Can I use it underwater?
Yes. CoralCrete cures fully whether it is submerged or in the air, so you can apply it right in the tank.
Grey or purple?
Grey blends with natural live and dry rock, while purple matches synthetic reef rock and coralline algae. Pick whichever hides best in your scape.
Is it reef safe?
Yes. Once mixed and applied it is safe for corals, invertebrates, and fish.
How much working time do I get?
About 5 minutes, which is plenty to position a frag or rock before it sets, then it fully hardens over 24 hours.
Have a question?
Seachem CoralCrete
