Markal Cool Gel Heat Barrier Spray 16 oz — clear, non-staining insulating gel for soldering

Markal Cool Gel Heat Barrier Spray is a clear, non-staining gel spray that clings to surfaces to protect nearby finishes and components from heat during soldering, brazing, and welding.

When you work with open flame or torches near finished parts, unprotected paint, plastics, and delicate components can discolor or warp from stray heat. Markal’s Cool Gel delivers a tacky, water-based barrier that stays put without running, so it shields adjacent areas during localized high-heat tasks and cleans up easily afterward. The 16 oz aerosol provides convenient coverage for shop and field use and is made in the U.S.

How does this product reduce heat transfer during soldering and brazing?

The gel formula creates a thin insulating layer that slows heat conduction to adjacent surfaces. Because it clings instead of flowing, it stays over the area you want to protect for the duration of the operation.

• Gelled, tacky consistency prevents drip and migration
• Forms a temporary thermal barrier between torch and nearby parts
• Clear finish avoids hiding markings or measurement lines

Will it stain painted or finished surfaces and is cleanup difficult?

Cool Gel is designed to be clear and non-staining so it won’t discolor paint or metal finishes. After the job, the gel wipes away without aggressive solvents, minimizing post-job cleanup time.

• Non-staining, clear residue that’s easy to remove
• Wipes off with cloths or mild cleaners—no grit or abrasive scrubbing
• Leaves no sticky film once removed

Is the product safe for use around skin, indoor shops, and sensitive parts?

Formulated to be non-toxic and odorless, the gel is intended to be safe for typical shop environments. As with any aerosol product, use good ventilation and avoid prolonged skin contact by wearing gloves.

• Non-toxic, odorless formula suitable for enclosed workspaces
• Harmless to skin under normal incidental contact—use gloves as standard practice
• Doesn’t corrode or chemically attack metals and most finishes

How do I apply and how much coverage does one 16 oz can give?

Shake the can and spray a light, even coat on the surfaces you want to protect, holding it several inches away to avoid puddling. Coverage depends on layer thickness and application style but is suitable for multiple small jobs or several medium-sized areas per can.

• Shake well, apply even coats from 6–12 inches away
• Thin, tacky films give the best protection without waste
• One 16 oz can covers repeated spot jobs in a typical workshop

Who is this for: Technicians, plumbers, HVAC installers, metal fabricators, jewelers, and anyone who uses torches or heat tools near painted, plastic, or heat-sensitive parts will find Markal Cool Gel Heat Barrier Spray useful. It’s made for professionals and hobbyists who need a reliable, no-drip protective barrier that’s easy to apply and remove, and is produced in the United States for consistent quality.

Features: Made in US. Pack of 1, 16 oz aerosol. Intended for temporary protection during localized heating operations; follow standard safety precautions for torch work and aerosols.