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Marco Rock

Marco E-Marco 400 Aquascaping Cement

Marco E-Marco 400 Aquascaping Cement

Regular price Sale price £38.95
Regular price £38.95
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100% Non-Toxic - Triton ICP TestedBuild stunning, reef-safe aquascapes with this complete aquascaping mortar kit designed specifically for marine and reef tanks. Formulated to resist brittleness in...  Read More
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100% Non-Toxic - Triton ICP Tested

Build stunning, reef-safe aquascapes with this complete aquascaping mortar kit designed specifically for marine and reef tanks. Formulated to resist brittleness in saltwater, the mix blends into a smooth, paste-like consistency that bonds rock securely for a permanent, long-lasting structure.

Unlike many glues, epoxies, and polymer-based adhesives that can inhibit coverage, this mortar allows coralline algae to spread naturally—helping seams disappear faster for a more natural look. Ideal for intricate layouts, larger reef builds, arches, and stable foundations, it delivers professional results with hobbyist-friendly simplicity.

  • Reef-safe and 100% non-toxic
  • Specially modified for saltwater use
  • Ideal for larger reef aquascapes
  • More economical than many adhesives
  • Sets in about 20 minutes
  • Cures underwater for easy in-tank work
  • Approx. 2-hour handle time for adjustments


Choose the finish that best complements your rock and desired aesthetic—whether blending seamlessly with dry rock or enhancing a natural coralline appearance on established structures.

What’s Included?

Complete Mortar Kit
1x Mixing Spatula
1x Liquid Polymer Additive

Tips for best results:

  • Pre-fit your rockscape dry, then mark contact points.
  • Mix small batches to maintain workable time.
  • Apply to clean, dust-free rock for maximum bond strength.
  • Allow initial set before moving or adding heavy weight.


Perfect for saltwater aquariums, reef aquascaping, live rock bonding, and secure, natural-looking builds that mature beautifully over time.