Most adhesives get applied straight from the container, but an inorganic binder is often the raw ingredient a formulator mixes into a custom refractory cement, coating, or casting compound — the binder itself isn’t the finished product, it’s what holds the finished product together. Incure’s Epo-Weld™ high temperature inorganic binder line spans ten grades built for that formulation role, plus a smaller group of phosphate-bonded grades structural enough to function as finished potting and casting compounds in their own right.
Five Liquid Binders Formulate Custom Refractory Cements and Coatings
HTIB-101, 104, 105, 109, and 116 are all liquid inorganic binders used to formulate custom high-temperature cements, coatings, and wash coats rather than applied as a finished product on their own — differentiated mainly by viscosity and chemistry. HTIB-104 runs thinnest among this group at 200–500 cP, built for thin-film coatings and deep impregnation of porous substrates. HTIB-101 sits at a general-purpose 400–800 cP for formulating custom refractory cements and potting compounds broadly. HTIB-109 shares that same 400–800 cP range and is built for deep impregnation and sealing of porous ceramics and fibrous insulation — worth noting precisely because it isn’t actually the lowest-viscosity grade in this group despite its own description emphasizing penetration; HTIB-104 and, further below, HTIB-110 both run thinner. HTIB-105 steps up to 600–1,000 cP with high alkalinity specifically for stabilizing dispersions of basic refractory oxides like magnesia and alumina, preventing the settling and agglomeration a less compatible binder would allow. HTIB-116 is the thickest of this group at 3,000–4,000 cP and chemically distinct — an acidic alumina binder formulated to avoid silicon contamination entirely, positioned specifically for nuclear and aerospace applications where that purity requirement is non-negotiable.
110 Is a Standalone Fiber-Rigidizing Binder, the Thinnest in the Line
HTIB-110 breaks from the formulation-ingredient role of the five grades above it: a colloidal silica binder at just 10–20 cP — genuinely the thinnest grade in the entire line — built specifically to rigidize and harden refractory fiber boards and blankets. Rather than being mixed into a new compound, it’s applied directly onto a soft, friable fiber surface to convert it into a hard, erosion-resistant shell that stops dusting at elevated temperature. That’s a meaningfully different job than the five formulation binders above: those are ingredients for building something new, while HTIB-110 treats and strengthens a surface that already exists.
Email Us with your formulation goal, target viscosity, and whether the binder needs to go into a new compound or treat an existing surface, and Incure’s engineers can confirm which Epo-Weld™ inorganic binder grade actually fits.
Four Phosphate-Bonded Grades Are Structural, Not Just Formulation Ingredients
HTIB-117, 118, 125, and 126 all carry real cured mechanical specs — Shore D80–D85 hardness and roughly 9,600–10,500 PSI flexural strength — setting them apart from the liquid formulation binders above, which mostly show no hardness or flexural rating at all since they’re additives rather than finished materials. HTIB-117 is built for the investment casting industry specifically, replacing standard colloidal silicas in shell building and core making with better green strength and dimensional stability. HTIB-118 is unique in the line as a high-purity aluminum phosphate powder rather than a liquid — mixed with water and aggregates on-site, it trades a liquid’s shorter shelf life for extended storage and lower shipping cost, used in refractory mortars and investment casting molds. HTIB-125 is the hardest of the four at Shore D85 and thinnest at 100–200 cP, formulated for vibration-resistant potting on automotive and aerospace sensors where the cured binder itself has to survive sustained mechanical vibration, not just heat. HTIB-126 stands apart on cure schedule alone — a three-stage heat cure (2 hours at 77°F, 1 hour at 200°F, 1 hour at 700°F) rather than the line’s usual simple 24-hour room-temperature set — built specifically to seal ultra-fine porosity in thermal spray coatings on plasma-sprayed sensors and aerospace components, where that final high-temperature cure step is what actually locks the sealing barrier in place.
Where the Line Fits
Custom refractory cement and coating formulators draw on the five liquid binders, choosing primarily by viscosity and, for high-purity nuclear or aerospace work, HTIB-116’s silicon-free chemistry specifically. Fiber board and blanket rigidization relies on HTIB-110 rather than any of the formulation-ingredient grades. Investment casting and foundry operations favor HTIB-117 or the powder-form HTIB-118 depending on storage and mixing preferences. Vibration-exposed sensor potting and thermal-spray-coating porosity sealing are each HTIB-125 and HTIB-126’s specific niche respectively, chosen for their distinct cure and mechanical profiles rather than interchangeably. Facilities already running Incure’s high temperature glass coatings line for finished refractory sealing and repair products can add these inorganic binders specifically where the requirement shifts to formulating a custom compound rather than applying a ready-made one.
Contact Our Team to confirm the Epo-Weld™ inorganic binder grade for your formulation or application.
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