CaribSea Rock Lock 2 Minute Cement 500g (17oz) | Reef-Safe Quick-Setting Cement for Corals & Rocks

Overview

CaribSea Rock Lock 2 Minute Cement is a fast-setting bonding cement designed for reef builders and aquascapers. The 500g (17oz) tub provides ample material for securing corals, filling gaps, and shaping rock features without prolonged downtime. Its compact packaging makes it a practical addition to both in-tank projects and out-of-water prep sessions.

How it works

This cement is formulated to bond quickly to rock, ceramic, and live rock surfaces. With a short working window in typical aquarium conditions, you’ll be able to position pieces and rework small sections before the mix begins to cure. When cured, it forms a steady, reef-friendly bond that supports delicate pieces while minimizing disruption to your display.

What you can do

Use Rock Lock to attach corals, fill gaps between rocks, or craft cohesive reef scapes. It’s versatile enough to be employed inside the tank or used out of water for preparatory placements, enabling precise alignment before final immersion.

Key benefits

• Can be used in or out of water for flexible workflows
• Safe for fish, corals, and other invertebrates when used as directed
• Use to attach corals and secure delicate frags with confidence
• Ideal for creating rock structures and reef scapes with a clean finish

Practical tips

• Prepare surfaces, apply cement, and hold pieces until it sets
• Allow full cure before adding livestock; follow the packaging for cure times

Whether you’re building a vertical reef wall, bridging gaps between live rocks, or mounting new frag plugs, Rock Lock 2 Minute Cement offers a practical, reliable option for quick, controlled placement. It complements a thoughtful reef-keeping approach by combining strength, ease of use, and reef compatibility in one convenient product.