{"product_id":"woodland-scenics-lightweight-hydrocal-casting-plaster-2-lb-pourable-fast-setting-half-weight","title":"Woodland Scenics Lightweight Hydrocal casting plaster, 907 g — pourable, fast-setting, half-weight","description":"\u003cp\u003e\u003cstrong\u003eWoodland Scenics Lightweight Hydrocal C1201 is a half-weight casting plaster formulated for model terrain builders to cast rocks, create hard-shell terrain and fill around scenery with less bulk.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis powder plaster mixes into a pourable, fast-setting compound that produces detailed, durable castings while weighing roughly half as much as standard hydrocal. Its lighter density makes it easier to handle large scenic pieces, reduces dead weight on structures, and is especially useful for hobbyists who need realistic rock formations without adding excessive mass to dioramas, model railroads, or display bases. Each 2 lb bag yields approximately 1\/2 gallon (104 cubic inches) of mixed material when prepared per the manufacturer's directions.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I prepare Lightweight Hydrocal for casting rocks?\u003c\/h3\u003e\n\n\u003cp\u003eMixing reliably gives clean, detailed casts. Use room-temperature water, gradually add powder while stirring to avoid lumps, and follow recommended water-to-powder ratios provided by Woodland Scenics. Work promptly: Lightweight Hydrocal sets faster than some modelling compounds, so pour into moulds while still fluid.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMeasure water and powder precisely for consistent pours and curing times.\u003c\/li\u003e\n  \u003cli\u003eMix until smooth and lump-free for fine surface detail transfer.\u003c\/li\u003e\n  \u003cli\u003ePour into rock moulds and tap or vibrate to remove trapped air bubbles.\u003c\/li\u003e\n  \u003cli\u003eAllow full cure time before demolding and sanding or painting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat scenic techniques work best with this lightweight casting plaster?\u003c\/h3\u003e\n\n\u003cp\u003eLightweight Hydrocal adapts to several modelling uses, from full rock casts to thin hard-shell terrain layers. It bonds well to plaster, foam, and existing castings, and can be used to fill gaps between cast rocks or to skim over armatures for cliff faces. Because it’s lighter, it reduces strain on lightweight frames and minimizes warping of foam supports.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFull rock casts from moulds for boulders and outcrops.\u003c\/li\u003e\n  \u003cli\u003eHard-shell terrain—thin layers applied over formers or foam.\u003c\/li\u003e\n  \u003cli\u003eGap filler between pre-made rock castings for seamless transitions.\u003c\/li\u003e\n  \u003cli\u003eSanded and painted for natural-looking texture and colour.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I finish and paint cast pieces for realism?\u003c\/h3\u003e\n\n\u003cp\u003eAfter the Hydrocal has fully cured, lightly sand any rough edges and seal porous surfaces if needed. Use acrylic washes, dry-brushing, and multiple tinted layers to bring out details and depth. Seal finished pieces with a matte or satin sealer to protect paint and reduce powdery residue.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSand edges and seams once fully cured to blend joins.\u003c\/li\u003e\n  \u003cli\u003ePrime or seal porous casts to prevent paint soak-in and flaking.\u003c\/li\u003e\n  \u003cli\u003eApply base coats, washes, and dry-brushing to highlight texture.\u003c\/li\u003e\n  \u003cli\u003eFinish with a protective clear coat for durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there practical tips for saving and extending mixed Hydrocal?\u003c\/h3\u003e\n\n\u003cp\u003eBecause the mix sets relatively quickly, mix only what you’ll use within the working time. For small amounts, measure and mix in disposable cups; for larger projects, prepare multiple small batches. Clean tools promptly before the plaster hardens to avoid permanent buildup.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eOnly mix quantities you can pour within the working time.\u003c\/li\u003e\n  \u003cli\u003eUse chilled water to slow setting slightly in warm conditions.\u003c\/li\u003e\n  \u003cli\u003eKeep spare moulds prepped so you can pour efficiently between batches.\u003c\/li\u003e\n  \u003cli\u003eWash tools immediately after use to prevent hardened residue.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this product is for: Woodland Scenics Lightweight Hydrocal C1201 is aimed at modelers, railroaders, diorama builders, and hobby sculptors who need finely detailed rock and terrain castings without heavy bulk. It suits anyone creating large scenic elements, modular display pieces, or lightweight diorama components where weight, detail, and ease of finishing matter. Note: follow label instructions for mixing and safety, and avoid using on load-bearing structural elements where plaster strength limitations apply.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eProduct specifics:\u003c\/em\u003e 2 lb bag, yields roughly 1\/2 gallon (104 cubic inches) mixed volume; formulated for pouring into rock moulds, creating hard-shell terrain, and filling around castings. Includes highly detailed casting capability for realistic scenic results.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How much mixed volume does a 2 lb bag yield?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A 2 lb bag yields about 1\/2 gallon or approximately 104 cubic inches of mixed Hydrocal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Lightweight Hydrocal over foam armatures?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—it's suitable for hard-shell terrain over foam, but avoid heavy structural loads and use an appropriate adhesive or primer.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Woodland Scenics","offers":[{"title":"Default Title","offer_id":55255016603985,"sku":"B0006NARVI","price":54.54,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/5567\/3681\/files\/woodland-scenics-front-packaging-lightweight-hydrocal.jpg?v=1791695835","url":"https:\/\/craftiche.co.uk\/products\/woodland-scenics-lightweight-hydrocal-casting-plaster-2-lb-pourable-fast-setting-half-weight","provider":"Craftiche","version":"1.0","type":"link"}