--- product_id: 2023024 title: "HoldFast Epoxy Stick, Fish Safe 4 oz" brand: "instant ocean" price: "₱1899" currency: PHP in_stock: true reviews_count: 8 category: "Instant Ocean" url: https://www.desertcart.ph/products/2023024-holdfast-epoxy-stick-fish-safe-4-oz store_origin: PH region: Philippines --- # Dries bright white, sandable finish Safe for freshwater & marine tanks Superior rock bonding strength HoldFast Epoxy Stick, Fish Safe 4 oz **Brand:** instant ocean **Price:** ₱1899 **Availability:** ✅ In Stock ## Summary > ⚡ Cement your reef dreams with rock-hard confidence! ## Quick Answers - **What is this?** HoldFast Epoxy Stick, Fish Safe 4 oz by instant ocean - **How much does it cost?** ₱1899 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/2023024-holdfast-epoxy-stick-fish-safe-4-oz) ## 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, drilled, or filled for a flawless look. - • **Fish & Frag Friendly:** Non-toxic formula ensures a safe environment for all aquatic life. - • **Pro-Level Durability:** Withstands moisture and weight—perfect for complex reef designs and heavy rockwork. - • **Versatile Application:** Bonds rocks, corals, and slate seamlessly in both saltwater and freshwater tanks. - • **Unbreakable Aquascapes:** Create rock-solid underwater structures that hold firm under pressure. ## Overview Instant Ocean HoldFast Epoxy Stick is a 4 oz non-toxic, fish-safe epoxy designed for freshwater and marine aquariums. It bonds rocks, corals, and slate with superior strength, dries white for easy finishing, and supports durable, customizable aquascapes that last. ## Description Instant Ocean HoldFast Epoxy Stick, Fish Safe 4 oz Review: My rockwork isn't moving. AT ALL. - 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: Works great for me and can't beat the price as a budget reefer. - I use this to secure my dry rock together when creating a reef aquascape and also for attaching frags. When attaching frags to live rock, you must add superglue gel to both the epoxy side and the live rock side of the epoxy. You basically sandwich the epoxy between superglue gel or it's not going to adhere correctly. It's aggravating at first but if you continue to attach your frags this way you will get better at it. I find when the epoxy is used in water never gets totally hard but stays somewhat gummy. However when used on dry rock and allowed to cure for 24 hours it becomes rock hard. I had to remove a rock from another after 24 hours and it took me beating the rock with a hammer to get the cured epoxy to break. I've also let balls of just epoxy dry accidentally and they next days they are basically rocks themselves. Tips for aquascaping with dry rock: use the little broken pieces from the rock to stick into the epoxy joints you make to help hide the epoxy. Do this under 10 min or so or it will be too hard by then. On rocks that just aren't stable enough and want to roll, you can add little "feet" that stabilize the rock, to keep the "feet" from sticking to the surface they are sitting on, just apply some of the rock dust particles that fall off the dry rock. I've never tried one of the other brands of reef epoxy as this one is cheap ( on desertcart anyway never in any of my local stores) and I've had good luck with it. The only negative is the color, it dries totally white. Which is fine if you are aquascaping with white dry rock but it does show badly on live rock under frags. In the attached pic, most all of the rock is epoxied together, some of these rocks weigh several pounds and didn't balance very well, where the where natural holes in the rock (back side) I did use some zip ties to also help stabilize the rock. Update 9/11/2018- Was almost out so I ordered more and it appeared I would be receiving the new coralline purple color, product came and it was the green dries to white version, so not really happy I wasn't sent the pictured product. Update 3/6/2019- Still using this product, I've used numerous tubes since beginning the hobby and will continue to do so, as this stuff holds up well and is inexpensive. Update 8/18/2020- I still use the same exact method of attaching frags and have not had any issues with my reef aquascape coming apart. If anything, I have difficulty getting frags off, if I decide to move something later. ## 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 | | ASIN | B001JSXBYO | | Best Sellers Rank | #19,952 in Pet Supplies ( See Top 100 in Pet Supplies ) #193 in Aquarium Water Treatments | | Brand Name | Instant Ocean | | Color | White | | Compatible Material | Rocks, Corals, Slate | | Container Type | Tube | | Customer Reviews | 4.3 4.3 out of 5 stars (2,590) | | Date First Available | October 2, 2001 | | Global Trade Identification Number | 00051378056007 | | Is Discontinued By Manufacturer | No | | Item Form | Stick | | Item Package Quantity | 1 | | Item Type Name | Instant Ocean HoldFast Epoxy Stick 4USoz./113g | | Item Weight | 4 Ounces | | Item model number | HF-1 | | Manufacturer | Instant Ocean | | Manufacturer | Instant Ocean | | Manufacturer recommended age | 1 month and up | | Material Type | Epoxy Resin | | Model | HF-1 | | Other Special Features of the Product | Fish Safe, Superior Bonding | | Product Dimensions | 1.25 x 6 x 9.38 inches; 4 ounces | | UPC | 051378056007 | | Unit Count | 1 Count | | Viscosity | High | | Volume | 118.28 Milliliters | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** Instant Ocean - **Color:** White - **Item Form:** Stick - **Material:** Epoxy Resin - **Special Feature:** Fish Safe, Superior Bonding ## Images ![HoldFast Epoxy Stick, Fish Safe 4 oz - Image 1](https://m.media-amazon.com/images/I/81Ie2BwBgAL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ My rockwork isn't moving. AT ALL. *by C***E on July 19, 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! ### ⭐⭐⭐⭐⭐ Works great for me and can't beat the price as a budget reefer. *by H***N on July 26, 2018* I use this to secure my dry rock together when creating a reef aquascape and also for attaching frags. When attaching frags to live rock, you must add superglue gel to both the epoxy side and the live rock side of the epoxy. You basically sandwich the epoxy between superglue gel or it's not going to adhere correctly. It's aggravating at first but if you continue to attach your frags this way you will get better at it. I find when the epoxy is used in water never gets totally hard but stays somewhat gummy. However when used on dry rock and allowed to cure for 24 hours it becomes rock hard. I had to remove a rock from another after 24 hours and it took me beating the rock with a hammer to get the cured epoxy to break. I've also let balls of just epoxy dry accidentally and they next days they are basically rocks themselves. Tips for aquascaping with dry rock: use the little broken pieces from the rock to stick into the epoxy joints you make to help hide the epoxy. Do this under 10 min or so or it will be too hard by then. On rocks that just aren't stable enough and want to roll, you can add little "feet" that stabilize the rock, to keep the "feet" from sticking to the surface they are sitting on, just apply some of the rock dust particles that fall off the dry rock. I've never tried one of the other brands of reef epoxy as this one is cheap ( on Amazon anyway never in any of my local stores) and I've had good luck with it. The only negative is the color, it dries totally white. Which is fine if you are aquascaping with white dry rock but it does show badly on live rock under frags. In the attached pic, most all of the rock is epoxied together, some of these rocks weigh several pounds and didn't balance very well, where the where natural holes in the rock (back side) I did use some zip ties to also help stabilize the rock. Update 9/11/2018- Was almost out so I ordered more and it appeared I would be receiving the new coralline purple color, product came and it was the green dries to white version, so not really happy I wasn't sent the pictured product. Update 3/6/2019- Still using this product, I've used numerous tubes since beginning the hobby and will continue to do so, as this stuff holds up well and is inexpensive. Update 8/18/2020- I still use the same exact method of attaching frags and have not had any issues with my reef aquascape coming apart. If anything, I have difficulty getting frags off, if I decide to move something later. ### ⭐⭐⭐⭐ Solid. 👌 *by E***S on January 20, 2026* Turns solid as stone when used as directed. Mixing together takes patience and it does smell quite terrible but this stuff works really well for bonding and sealing. Safe for invertebrates when cured(used some to seal sharp decorations in a jumping spider enclosure once). ## Frequently Bought Together - Instant Ocean HoldFast Epoxy Stick, Fish Safe 4 oz - Seachem Reef Glue Cyanoacrylate Gel Coral Frag Mounting, 20g (001167) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ph/products/2023024-holdfast-epoxy-stick-fish-safe-4-oz](https://www.desertcart.ph/products/2023024-holdfast-epoxy-stick-fish-safe-4-oz) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-04-25*