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One Source for Maintenance & Installation Solutions

Founded in 1937, RectorSeal started as a manufacturer of specialty chemical sealants. One of our first products, RectorSeal Number 5, became a staple of the plumbing industry, becoming the most common thread sealant throughout the U.S. Since these beginnings, we have continued to grow by expanding our offering of chemical and mechanical products to support the tradesman in their work.

Our growth has centered around a simple mission: To provide innovative solutions to the professional trades. We want to help professionals in the heating & cooling, plumbing, electrical and construction industries perform their work faster and with greater reliability.

Featured Products:

RSH-50 Surge Protective Device (SPD) for Single-Phase System

The permanently-installed RSH Series is designed to protect all single phase, 120/240-V air conditioning, heat pumps and ductless mini-split systems (DMSS) from transient over-voltage and natural-cause surges.

The UL 1449 listed RSH Series’ inaugural products are the RSH-50 that protects from up to 50,000-amp single surges and up to 10,000-amp repetitive surges

The RSH Series is weather-rated under NEMA 4X and can be installed within minutes to the nearby outdoor disconnect box’s knockout access with an included 1/2-inch (12.7-mm) nipple and wired to the contactors. The RSH-50 can also be mounted inside the condenser with an included stainless steel bracket and wired directly.


Lifetime Warranty

Long-Lasting Gas Discharge Tube Technology

For Residential or Commercial Use

TFMOV Technology

Green LED Indicates Protection

AC Leak Freeze PRO

NANO leak sealant formula is reliable, safe and polymer free. Magic Frost adds an anti-friction lubricant to reduce noise/vibration so system runs smoother, more efficient. UV adds the ability for a UV light source to detect larger leaks for system assessment.

PRO Nano

Reliable, safe and polymer-free*

Leak seeking nano particles.

PRO Nano with Magic Frost:

Magic Frost formula enhances system performance reducing compressor noise and extend compressor life.

Magic Frost adds anti-friction lubricant to reduce noise/vibration.

System runs smoother, more efficient.


UV adds the ability for a UV light source to detect larger leaks for system assessment.


Single use – disposable



OEM approved

Infuse into system using standard HVAC manifold

Nylon hose, brass fittings and copper reservoir are all 100% recyclable