---
product_id: 260332831
title: "Aquarium Systems AIOHF1 Holdfast Epoxy Stick, 4USoz./113g"
brand: "instant ocean"
price: "¥7796"
currency: JPY
in_stock: true
reviews_count: 5
category: "Instant Ocean"
url: https://www.desertcart.jp/products/260332831-aquarium-systems-aiohf1-holdfast-epoxy-stick-4usoz-113g
store_origin: JP
region: Japan
---

# Safe for freshwater & marine tanks 4 oz epoxy stick for sturdy builds Dries white, sandable & drillable Aquarium Systems AIOHF1 Holdfast Epoxy Stick, 4USoz./113g

**Brand:** instant ocean
**Price:** ¥7796
**Availability:** ✅ In Stock

## Summary

> 🧩 Build your underwater masterpiece with confidence!

## Quick Answers

- **What is this?** Aquarium Systems AIOHF1 Holdfast Epoxy Stick, 4USoz./113g by instant ocean
- **How much does it cost?** ¥7796 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/260332831-aquarium-systems-aiohf1-holdfast-epoxy-stick-4usoz-113g)

## Best For

- instant ocean enthusiasts

## Why This Product

- Trusted instant ocean brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Customizable Finish:** Dries white and can be sanded, filled, or drilled to match your aquascape vision.
- • **Fish & Invertebrate Safe:** Non-toxic formula ensures a healthy environment for all aquatic life.
- • **Rock-Solid Aquarium Sculpting:** Create caves, arches & walls with confidence using superior bonding strength.
- • **Versatile for Fresh & Saltwater:** Perfectly bonds rocks, corals, and slate in any aquarium setup.
- • **Pro Tips for Perfect Application:** Use water to ease mixing and shaping, then cure for 2+ days for maximum durability.

## Overview

Instant Ocean HoldFast Epoxy Stick is a 4 oz non-toxic epoxy designed for freshwater and marine aquariums. It bonds rocks, corals, and slate into durable, custom structures that are safe for fish and invertebrates. The epoxy dries white and can be sanded or drilled, allowing for seamless aquascape customization. Trusted by hobbyists for creating sturdy, intricate underwater environments.

## Description

Instant Ocean HoldFast Epoxy Stick, Fish Safe 4 oz

Review: Excellent
Review: Bought two of these little tubes to "cement" my rockwork together in my saltwater tank and used about a tube an a half. I had about 120 pounds of rock that I wanted to form into a few structures in my 75 gallon tank and this stuff worked beautifully! I had been letting my rock cure in large tubs with a circulation pump for a few weeks, so they were still very wet when I used this epoxy to hold them together and it still became rock hard and my structure is SO sturdy. I created a large archway and a complete hollow circle through the rocks. Neither of these are very sturdy structure alone, but with the epoxy I could grab the center of the archway and pick it up with no breaking and no worries. I would absolutely use this product again if I ever need to do another aquascape. It dries stark white, but will soon enough be covered by beautiful coralline algae, so no worries. A few notes: -This is NOT glue. It is NOT sticky. It will NOT "hold" two pieces of rock together. You cannot simply plop a piece of this epoxy on the bottom rock and shove your other rock on top and expect it to hold. It will NOT hold. I found the best way to ensure a sound structure was to position the two pieces of rock exactly how I wanted them and then completely encircle the seam of the two pieces with this epoxy being sure to shove as much as possible into nooks and crannies on each piece of rock as I went around and then smoothing the epoxy a bit up the side of each piece of rock. It works the best if the two pieces of rock can already stay balanced on top of each other without moving without the epoxy. Otherwise you'll just have to hold them until the epoxy begins to harden. -Keep a cup of water close by while you work. As you are mixing the epoxy, dip a finger or two in the water and continue working it. The little bit of water helps it mix much easier and faster and allows it to soften up just a bit so you can get more into the nooks and crannies of each rock. When you get the epoxy mixed and are ready to place it around your rock, dip a finger or two back in the water. Use these fingers to work with the epoxy on the rock. This helps the epoxy stick to the rock and not your fingers and allows you to smooth it out around the rock pieces and into the nooks and crannies. -Let the epoxy harden a couple of days before moving the rock or submerging it in water. I let mine cure about 35ish hours before doing anything with it. I did want my rocks to stay moist, so I poured a bit of saltwater over them periodically and this did not seem to mess up the epoxy at all, but I would be cautious about completely submerging it too soon. I know this was long, but I wanted yall to have an honest review and a few helpful tips! I hope it helped yall out!

## Features

- Instant Ocean HoldFast Epoxy Stick, Fish Safe 4 oz
- SAFE FOR ANIMALS: Non-toxic epoxy is safe for all fish and invertebrates.
- FOR FRESHWATER & MARINE aquariumS: Bonds rocks, corals, slate and more.
- SUPERIOR BONDING: Lets you create caves, cliffs, steps and walls for aquarium animals to enjoy.
- DRIES WHITE: Once dry, epoxy can be sanded, filled or drilled.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001JSXBYO |
| Assembly Required | No |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #6,742 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #26 in Epoxy Adhesives |
| Color | Turquoise |
| Customer Reviews | 4.3 4.3 out of 5 stars (2,450) |
| Date First Available | 8 August 2012 |
| Item model number | HF-1 |
| Material Type(s) | cotton |
| Number of Puzzle Pieces | 1 |
| Product Dimensions | 3.18 x 15.24 x 23.83 cm; 113.4 g |

## Product Details

- **Brand:** Instant Ocean
- **Item form:** Stick
- **Material:** cotton
- **Special features:** Non Toxic
- **Specific uses for product:** Aquarium, Underwater, Marine Environment

## Images

![Aquarium Systems AIOHF1 Holdfast Epoxy Stick, 4USoz./113g - Image 1](https://m.media-amazon.com/images/I/81Ie2BwBgAL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***R on 6 July 2017*

Excellent

### ⭐⭐⭐⭐⭐ Review
*by C***E on 19 July 2020*

Bought two of these little tubes to "cement" my rockwork together in my saltwater tank and used about a tube an a half. I had about 120 pounds of rock that I wanted to form into a few structures in my 75 gallon tank and this stuff worked beautifully! I had been letting my rock cure in large tubs with a circulation pump for a few weeks, so they were still very wet when I used this epoxy to hold them together and it still became rock hard and my structure is SO sturdy. I created a large archway and a complete hollow circle through the rocks. Neither of these are very sturdy structure alone, but with the epoxy I could grab the center of the archway and pick it up with no breaking and no worries. I would absolutely use this product again if I ever need to do another aquascape. It dries stark white, but will soon enough be covered by beautiful coralline algae, so no worries. A few notes: -This is NOT glue. It is NOT sticky. It will NOT "hold" two pieces of rock together. You cannot simply plop a piece of this epoxy on the bottom rock and shove your other rock on top and expect it to hold. It will NOT hold. I found the best way to ensure a sound structure was to position the two pieces of rock exactly how I wanted them and then completely encircle the seam of the two pieces with this epoxy being sure to shove as much as possible into nooks and crannies on each piece of rock as I went around and then smoothing the epoxy a bit up the side of each piece of rock. It works the best if the two pieces of rock can already stay balanced on top of each other without moving without the epoxy. Otherwise you'll just have to hold them until the epoxy begins to harden. -Keep a cup of water close by while you work. As you are mixing the epoxy, dip a finger or two in the water and continue working it. The little bit of water helps it mix much easier and faster and allows it to soften up just a bit so you can get more into the nooks and crannies of each rock. When you get the epoxy mixed and are ready to place it around your rock, dip a finger or two back in the water. Use these fingers to work with the epoxy on the rock. This helps the epoxy stick to the rock and not your fingers and allows you to smooth it out around the rock pieces and into the nooks and crannies. -Let the epoxy harden a couple of days before moving the rock or submerging it in water. I let mine cure about 35ish hours before doing anything with it. I did want my rocks to stay moist, so I poured a bit of saltwater over them periodically and this did not seem to mess up the epoxy at all, but I would be cautious about completely submerging it too soon. I know this was long, but I wanted yall to have an honest review and a few helpful tips! I hope it helped yall out!

### ⭐⭐⭐⭐⭐ Review
*by L***O on 17 July 2021*

Not easy to use

## Frequently Bought Together

- Instant Ocean HoldFast Epoxy Stick, Fish Safe 4 oz
- Seachem Reef Glue Cyanoacrylate Gel Coral Frag Mounting, 20g (001167)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-15*