A deep-section casting resin that skins over on top while the center stays soft doesn’t fail at the surface — it fails underneath, where a two-part system’s slow cure and long pot life leave uncontrolled shrinkage and trapped bubbles no amount of surface polish can hide. Incure’s Cast-Max™ line replaces that wait with a single-component urethane acrylate that cures on demand under UV light, across twelve grades built for depth, hardness, and service temperature independently rather than as one fixed formula.

Twelve Grades Split Across Two Service-Temperature Bands

Eight grades — 1045, 1049, 1404, 2013, 2033, 2063, 2613, and 2664 — are rated −55°C to 80°C, the standard band for indoor electronics, decorative doming, and general encapsulation work. The remaining four — 6755, 7653, 7673, and 7693 — extend to 125–150°C, formulated for potting and casting applications that see sustained heat the standard-band grades aren’t rated for, such as encapsulation near power components or under-hood assemblies. Picking a temperature band first narrows the field to roughly a third of the line before viscosity or hardness even enters the decision.

Viscosity Runs 400 to 8,600 cP, and It Sets Cavity Depth

The two lowest-viscosity grades, 6755 and 7653 at 400–800 cP, are thin enough for shallow, self-leveling fills where bubble release matters more than gap-bridging depth. At the other end, 1049 (4,300–8,600 cP) and 1045 (4,100–8,200 cP) hold their shape in deeper cavities without running off before cure. 2013, at a moderate 1,000–2,000 cP, sits in the range best suited to glob top work over bare dies and wire bonds — flowable enough to self-level around delicate wire geometry without the higher-viscosity grades’ resistance to filling tight gaps.

Hardness and Elongation Diverge Sharply Across the Line

2013 is the outlier worth naming directly: 120% elongation at Shore D30–D40, by far the most flexible and impact-resistant grade in the range, built to absorb mechanical shock over fragile electronic assemblies rather than resist deformation. 1049 sits at nearly the opposite extreme — just 6% elongation at Shore D81–D91, paired with a 10,300 PSI metal-glass tensile figure that’s the highest in the line — a hard, scratch-resistant finish suited to decorative doming where surface durability matters more than flex. 7693, one of the high-temperature grades, reaches 6,500^ PSI tensile on plastics at only 3.5% elongation and uses a cationic epoxy cure mechanism rather than the free-radical acrylate chemistry the rest of the line runs on — a genuinely different cure pathway, not just a different formulation of the same chemistry, worth flagging separately when a process is being qualified around it. Selecting a grade for a specific mechanical outcome means checking where it actually sits on this spread rather than assuming “Cast-Max™” describes one consistent hardness profile.

One Grade in the Line Isn’t a Casting Resin at All

1404 carries the Uni-Weld™ series name rather than Cast-Max™, and its spec profile reflects that: 5,500 PSI tensile on plastics and 6,000 PSI on metal-glass at just 6% elongation, a structural bonding profile rather than a self-leveling casting fill. It’s included on this page for glass assembly work where a structural bond, not a cast fill, is the actual requirement — worth distinguishing from the other eleven grades before specifying it for a doming or potting application it wasn’t formulated for.

Email Us with your cavity depth, service temperature, and whether the application needs flex or rigidity, and Incure’s engineers can confirm which Cast-Max™ grade actually fits.

Dual-Cure for Shadow Areas

For assemblies with true shadow areas — geometry a UV lamp’s line of sight can’t reach directly — Incure’s related Quad-Cure™ formulation adds a secondary cure mechanism alongside the UV path, the same shadow-area problem addressed in Incure’s Ultra-Illumina™ UV conformal coating line. Where a casting geometry is fully exposed to the lamp, the single-cure Cast-Max™ grades above are the simpler and faster-curing choice.

Cure Equipment

Cast-Max™ grades cure in the 365–405 nm UVA range, compatible with Incure’s L9000™ UV LED spot lamp, L-Series™ UV LED flood lamps, and B/C-Series™ cure chambers for enclosed batch curing of deeper cavity fills.

Where the Line Fits

Decorative doming over labels, nameplates, and branding panels draws on hard, scratch-resistant grades like 1049 for a durable three-dimensional finish that holds up to handling. Glob top encapsulation of bare dies and wire bonds favors 2013’s high elongation, cushioning delicate wire geometry against vibration and thermal-cycling stress rather than locking it rigidly in place. Deep-section potting uses the higher-viscosity grades’ resistance to running, achieving cure depth with controlled shrinkage in place of a two-part resin’s long oven cure. Glass assembly work — glass-to-glass, glass-to-metal, and glass-to-plastic — draws on 1404’s structural tensile profile specifically, distinct from the casting grades, a pairing worth checking against Incure’s UV glass & metal bonder grade guide when a joint needs both structural strength and optical clarity. Lens casting and light guide encapsulation lean on the line’s non-yellowing optical clarity, a concern that runs in parallel with index and viscosity selection covered in Incure’s Optik™ optical adhesive grade guide.

Contact Our Team to confirm the Cast-Max™ grade for your cavity depth and service temperature.

Visit www.incurelab.com for more information.