Soldering, sandblasting, and solvent cleaning all put localized stress on a part, and the surfaces next to the work zone need protection that stays put and then peels away clean. Incure Litemask™ 1123G is a light-curable peelable gel maskant designed for exactly that kind of temporary, high-contrast protection.

Why a gel form

A gel maskant behaves differently from a thin resin. It holds its shape on a vertical wall, does not run off an edge, and forms a defined boundary where it is placed. That makes 1123G suited to spot masking: covering a connector next to a soldering operation, protecting a machined face during grit blasting, or shielding an area from solvent splash without coating the whole part.

The gel is applied by brush or dispense, cured in place, and removed by hand. It carries no adhesive, so there is no residue to clean off the protected surface afterward.

Cure options

1123G cures under UV, visible, or LED light. The reaction is a radical photopolymerization driven by energy near 365–405 nm. A repeatable result depends on the delivered dose, measured in millijoules per square centimeter with a radiometer, and on every masked surface seeing that light. Shadowed regions behind standing features cure slowly and may need repositioning under the lamp or a supplemental pass.

Because UV output falls as sources age, intensity should be verified rather than assumed. Batch work cures under Incure L-Series UV LED flood lamps at a set distance, and enclosed curing fits an Incure B/C-Series UV cure chamber.

Protection during soldering, blasting, and cleaning

The cured film resists the conditions of soldering processes, sand-blasting media, and a range of chemicals and solvents. For soldering, the film has to tolerate localized heat at the work zone without breaking down at the mask edge. For blasting, it has to absorb media impact rather than chip away. The gel’s toughness and elongation give it the give it needs for both.

That same elongation and toughness provide passive vibration isolation, which is why 1123G is also used where a protective layer needs to damp shock and vibration on a component during handling or transport.

Removal

1123G is removed by soaking the masked component in hot water for about a minute, which relaxes the film so it peels away in one piece without breakage. Clean removal is a design goal of the grade: the film should not split into fragments that lodge in tight features or leave a skin behind on the protected surface.

The maskant is also usable as a bonder for various substrates when a compliant, peelable-strength joint is wanted rather than a permanent structural bond.

For help matching Litemask™ 1123G to a soldering profile, blast setup, or cleaning chemistry, Email Us with the process details and the substrate.

Failure modes

Tacky residue after removal is a cure symptom: add dose or reposition the part so shadowed areas get light. Tearing on peel that leaves gel in a recess usually means the film was applied too thin for the feature. Edge lift during blasting points to a feathered boundary; apply the gel with a defined edge and confirm that edge is fully cured. Heat damage at the mask line during soldering means the film was too close to the work or exposed too long, so the masked boundary should be set back from the heat zone.

Building it into the process

Treat spot masking as a controlled step. Specify the surface cleanliness before application, the film placement and thickness, the cure dose and verification method, the exposure limits for the downstream process, and a removal-and-inspection check for residue and torn edges. Because a fully cured film leaves no ionic residue, the gel suits cleanliness-sensitive electronic assemblies as well as general hardware.

Used this way, a peelable gel maskant removes a frequent source of scrap: heat marks, blast frosting, or solvent attack on a surface that was supposed to be protected.

Frequently asked questions

Q: Why choose a gel maskant over a liquid one?
A: A gel holds its shape where the operator places it. It does not run off vertical walls, does not creep past the intended line, and does not pool in low spots. That control matters when the masked and exposed areas sit close together and a wandering edge would spoil the result.

Q: How does hot-water removal work?
A: Soaking the masked component in hot water for about a minute relaxes the cured film so it peels away in one piece rather than tearing. It also helps flush any film fragments out of tight features.

Q: Can the same material be used as an adhesive?
A: Yes. 1123G can bond various substrates where a compliant, peelable-strength joint is wanted instead of a permanent structural bond. Its elongation and toughness also give it passive vibration isolation, which is useful when a component needs a protective, shock-damping layer during handling or transport.

Q: What temperature can it tolerate during soldering?
A: The film resists localized soldering heat at the work zone, but the masked boundary should be set back from the heat source. Prolonged or direct exposure at the mask line will degrade the edge.

Getting support

Incure can help select a maskant grade, define the cure and removal steps, and troubleshoot edge or residue problems. Contact Our Team to discuss your masking application and request technical data.

Visit www.incurelab.com for more information.