{"product_id":"seachem-coral-crete","title":"Seachem Coral Crete","description":"\u003cp\u003e\u003cstrong\u003eSets rock solid underwater in twenty-four hours.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeachem Coral Crete is a two-part epoxy putty for securing coral to rockwork and fusing loose rock into a stable aquascape. It gives about five minutes of working time, firms up at roughly fifteen, and reaches full cure at twenty-four hours — submerged or in air. Four options are stocked: grey and purple, each in 57 g and 114 g.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCures underwater or dry\u003c\/strong\u003e — the same 24-hour cure whether the join is submerged or above the waterline, so you can work in the tank without draining it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive minutes of working time\u003c\/strong\u003e — long enough to knead, cut and place a piece properly, short enough that you are not holding a frag for an hour.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePresses into pore structure\u003c\/strong\u003e — worked firmly around a base or contact point, the putty keys into the rock rather than just sitting on it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo colours, one formula\u003c\/strong\u003e — grey and purple are functionally identical. Seachem lists the choice as aesthetic, so pick the one that disappears into your rockwork.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo sizes\u003c\/strong\u003e — 57 g for frag work and single joins, 114 g for larger aquascaping sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResealable storage tube\u003c\/strong\u003e — cut off what you need and return the rest to the tube, so a part-used stick keeps.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWorking time and cure\u003c\/h3\u003e\n\u003cp\u003eThe useful figure here is not a single cure time but the whole timeline, because what you can do with the putty changes minute by minute after it is kneaded.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eTime from mixing\u003c\/th\u003e\n\u003cth\u003eState of the putty\u003c\/th\u003e\n\u003cth\u003eWhat you can still do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e0–5 minutes\u003c\/th\u003e\n\u003ctd\u003eSoft and workable\u003c\/td\u003e\n\u003ctd\u003eKnead to a uniform colour, cut to size, shape and place\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAbout 5 minutes\u003c\/th\u003e\n\u003ctd\u003eBegins to harden\u003c\/td\u003e\n\u003ctd\u003eFinal positioning only — stop reshaping\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e5–15 minutes\u003c\/th\u003e\n\u003ctd\u003eFirming\u003c\/td\u003e\n\u003ctd\u003eSmall adjustments to alignment; hold the piece steady\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAbout 15 minutes\u003c\/th\u003e\n\u003ctd\u003eHard to the touch\u003c\/td\u003e\n\u003ctd\u003eLeave it alone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e24 hours\u003c\/th\u003e\n\u003ctd\u003eFully cured, submerged or in air\u003c\/td\u003e\n\u003ctd\u003eSafe to rely on structurally\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eWear gloves — latex or nitrile — particularly if your skin is sensitive.\u003c\/li\u003e\n\u003cli\u003eCut off only the amount you need and return the rest to the plastic storage tube straight away.\u003c\/li\u003e\n\u003cli\u003eRemove the film and knead the two parts together until the colour is completely uniform. Streaks mean it is not mixed, and unmixed putty does not cure properly.\u003c\/li\u003e\n\u003cli\u003ePress firmly around the base or contact point of the coral or rock, working it into the pores rather than smoothing it over the surface.\u003c\/li\u003e\n\u003cli\u003eSupport the piece for the first fifteen minutes, then leave it undisturbed for twenty-four hours.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhat to expect in the tank\u003c\/h3\u003e\n\u003cp\u003eSeachem notes that protein skimmers may over-activate during the cure. If your skimmer starts overflowing shortly after you use Seachem Coral Crete, that is the expected behaviour, not a fault — turn it down or off for a few hours and set it back afterwards.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSeachem\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eTwo-part epoxy putty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColours\u003c\/th\u003e\n\u003ctd\u003eGrey and purple — functionally identical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSizes\u003c\/th\u003e\n\u003ctd\u003e57 g (2 oz) and 114 g (4 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking time\u003c\/th\u003e\n\u003ctd\u003eApproximately 5 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHard to the touch\u003c\/th\u003e\n\u003ctd\u003eApproximately 15 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFull cure\u003c\/th\u003e\n\u003ctd\u003e24 hours, submerged or in air\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCures underwater\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eMarine and reef aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003eOriginal plastic tube, tightly closed, away from heat and flame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eThe four options\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eColour\u003c\/th\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eWhere it fits\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eGrey\u003c\/th\u003e\n\u003ctd\u003e57 g\u003c\/td\u003e\n\u003ctd\u003eA handful of frags or a single rock join. Disappears into fresh, uncoloured dry rock.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGrey\u003c\/th\u003e\n\u003ctd\u003e114 g\u003c\/td\u003e\n\u003ctd\u003eA full aquascaping session with several joins, on grey or freshly cured rock.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePurple\u003c\/th\u003e\n\u003ctd\u003e57 g\u003c\/td\u003e\n\u003ctd\u003eSmall jobs on established rock, where coralline has already coloured the surface.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePurple\u003c\/th\u003e\n\u003ctd\u003e114 g\u003c\/td\u003e\n\u003ctd\u003eLarger work in a mature reef, where grey putty would show against the coralline.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhich one do I need?\u003c\/h3\u003e\n\u003cp\u003eEvery version of Seachem Coral Crete is the same putty. Colour is purely about how visible the join is. Grey blends into dry rock and newly cycled aquascapes; purple blends into established rock that coralline algae has already covered. There is no performance difference between them.\u003c\/p\u003e\n\u003cp\u003eSize is about how much you will use before the tube is opened too often. A frag session of five or six pieces sits comfortably inside 57 g. Building or repairing a structure — arches, overhangs, joining several rocks into one piece — is a 114 g job, and running out mid-build with five minutes of working time on the clock is worse than having some left over.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMounting coral frags to plugs, rock and the aquascape\u003c\/li\u003e\n\u003cli\u003eJoining loose rock into stable structures\u003c\/li\u003e\n\u003cli\u003eFilling and disguising gaps between rocks\u003c\/li\u003e\n\u003cli\u003eRepairs made in the tank without draining it\u003c\/li\u003e\n\u003cli\u003eWork above the waterline, where the same 24-hour cure applies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSealing leaks or bonding glass — that is a silicone job, not an epoxy one. See \u003ca href=\"\/products\/seachem-silicone-seal-85g\"\u003eSeachem Silicone Seal\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eCarrying the load of a large rock structure on its own. Epoxy holds pieces together; it does not replace a properly built, well-supported base.\u003c\/li\u003e\n\u003cli\u003eInstant bonds. If you need a frag stuck in seconds rather than minutes, \u003ca href=\"\/products\/seachem-reef-glue-20g\"\u003eSeachem Reef Glue\u003c\/a\u003e is the right tool.\u003c\/li\u003e\n\u003cli\u003eFreshwater and planted aquascaping, where \u003ca href=\"\/products\/seachem-flourish-epoxy-114g\"\u003eSeachem Flourish Epoxy\u003c\/a\u003e is the matched product.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety and handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCauses skin irritation and serious eye irritation. Wear protective gloves and eye protection.\u003c\/li\u003e\n\u003cli\u003eKeep the tube tightly closed and away from heat and open flame.\u003c\/li\u003e\n\u003cli\u003eIf it contacts skin, wash with water. If it enters the eyes, rinse cautiously with water for several minutes and seek medical attention if irritation persists.\u003c\/li\u003e\n\u003cli\u003eKeep out of reach of children.\u003c\/li\u003e\n\u003cli\u003eSeachem publishes a Safety Data Sheet for this product at sds.seachem.com.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCare and storage\u003c\/h3\u003e\n\u003cp\u003eReturn unused putty to its plastic tube and seal it. Left in the open, the exposed surface skins over and is wasted. Stored properly, a part-used stick keeps for further sessions.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-reef-glue-20g\"\u003eSeachem Reef Glue 20 g\u003c\/a\u003e — cyanoacrylate gel that bonds in seconds underwater, for frags rather than structures\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-flourish-epoxy-114g\"\u003eSeachem Flourish Epoxy 114 g\u003c\/a\u003e — the freshwater and planted-tank equivalent\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-silicone-seal-85g\"\u003eSeachem Silicone Seal 85 g\u003c\/a\u003e — for glass and sealing work, which epoxy will not do\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-reef-dip\"\u003eSeachem Reef Dip\u003c\/a\u003e — for treating frags before they are mounted\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-reef-plus\"\u003eSeachem Reef Plus\u003c\/a\u003e — trace and vitamin supplement for the corals once they are placed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty, delivery and Australian notes\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable aquarium product, so no manufacturer equipment warranty applies. Your rights under the Australian Consumer Law apply in addition to anything the manufacturer states, including the guarantees that goods are of acceptable quality and fit for the purpose described.\u003c\/p\u003e\n\u003cp\u003eBoth sizes ship as ordinary parcels. Store away from heat, and keep the tube sealed in transit and on the shelf.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes Coral Crete really cure underwater?\u003c\/h4\u003e\n\u003cp\u003eYes. Seachem specifies a 24-hour full cure for Seachem Coral Crete whether the putty is submerged or in air, which is why it can be used inside a running tank without dropping the water level.\u003c\/p\u003e\n\u003ch4\u003eIs there any difference between the grey and the purple?\u003c\/h4\u003e\n\u003cp\u003eNo functional difference. Seachem lists the two colours as an aesthetic choice only — grey blends into fresh dry rock, purple blends into rock already coloured by coralline algae.\u003c\/p\u003e\n\u003ch4\u003eWhy did the protein skimmer overflow after using it?\u003c\/h4\u003e\n\u003cp\u003eSkimmers commonly over-activate while Coral Crete cures. Seachem notes this directly. Turn the skimmer down or off for a few hours and restore the setting once the cure is complete.\u003c\/p\u003e\n\u003ch4\u003eHow much working time is there once it is mixed?\u003c\/h4\u003e\n\u003cp\u003eAbout five minutes from the point the two parts are kneaded to a uniform colour, then roughly ten more minutes of firming during which only small positioning adjustments are practical.\u003c\/p\u003e\n\u003ch4\u003eWhat happens if it is not mixed thoroughly?\u003c\/h4\u003e\n\u003cp\u003eStreaks of unmixed material do not cure correctly, and the join stays soft where they are. Knead until the colour is completely even before placing it.\u003c\/p\u003e\n\u003ch4\u003eHow should leftover putty be stored?\u003c\/h4\u003e\n\u003cp\u003eCut only what you need and return the remainder to the original plastic tube, sealed and away from heat. That is Seachem's stated storage method and it keeps the unused portion usable.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"Grey \/ 114g","offer_id":55242269196579,"sku":"AA0532","price":24.95,"currency_code":"AUD","in_stock":false},{"title":"Grey \/ 57g","offer_id":55335265665315,"sku":"AA0531","price":16.5,"currency_code":"AUD","in_stock":false},{"title":"Purple \/ 114g","offer_id":55335265698083,"sku":"AA0530","price":24.95,"currency_code":"AUD","in_stock":false},{"title":"Purple \/ 57g","offer_id":55335265730851,"sku":"AA0529","price":16.5,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/3123-coralcrete-114_g-purple-scaled.png?v=1782710605","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/seachem-coral-crete","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}