Marco Rocks E-Marco 400 Solid Bond Aquatic Rock Mortar Complete Kit

Marco Rocks E-Marco 400 Solid Bond Aquatic Rock Mortar Complete Kit

Brand: Marco Rocks
Item Number: MRCO-E400

Regular price $42.00 On Sale

Only 8 left in stock!

Estimated Arrival: Between Aug 05 and Aug 11. *ETA for USA only. For accurate lead times, call us at 727-214-7750

Large, Custom, Or Backorder: Arrival Times May Vary.

Shipping Policy: Little or No Shipping Charges for Regular-Sized Items; We Cover Part of the Freight Costs for Large Items Shipped Nationally. See Shipping Policy.

Function: provide a readily mixable, easily applied, and concrete-strength mortar for binding rocks together for marine aquascape. Once the mortar dries and cures, it binds the multiple pieces of rock together into one solid stone piece. This mortar is also able to cure underwater if needed.

Mortar Malleable Work Time: 15 minutes after mixing

Mortar Hardening Time: 2-4 hours after setting structure in place

Mortar Full Cure Time (to fuse rocks together completely): 24 hours

  • If curing underwater, multiply the above time frames by 2
  • If mortaring large rocks together or working on overhangs, follow the "Mortar Full Cure Time" of 24-48 hours before moving or adding new pieces

What's Included:

  • 5 lbs of Mortar Powder
  • (1) Mixing Solution of Liquid Polymer
  • (1) Mixing Spatula
  • (1) Storage Bucket

What Else is Needed:

  • (1) Pair of Nitrile Gloves
  • (1) Work Surface Cover
  • (1) Disposable Plastic Cup for Mixing


  • Cover work surface
  • Put on gloves
  • Unpack all components
  • Add water to the bag of liquid polymer until almost full (ideally RO water)
  • Shake the bag until same consistency
  • Add appropriate amount of mortar powder to plastic mixing cup
  • Add in some liquid polymer solution to plastic mixing cup
  • Mix with mixing spatula until correct "pasty / wet clay" consistency is achieved
  • Add small amounts of mortar powder if too wet, and small amounts of liquid polymer if too dry
    • There's no specific measurements for this to follow, just experiment and have some fun with it :)
  • Apply mortar generously to contact points between each rock
  • Let cure for the appropriate time frame listed above
  • Once the entire structure is fully cured, it's ready to go into your tank

Have any further questions that aren't answered here? We'd love to hear from you, and learn how we can help you be as successful as possible in this wonderful hobby.

You can call in to 727-214-7750 to speak with Tyler from our team to determine how to create your Ideal Aquarium Build.

Also feel free to reach out to us at and we will aim to respond back within the next few hours.


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