Description
Master sealing washer, gasket, valve core/cap & 1234yf kit
The all-in-one sealing solution for the modern A/C bench — a professional-grade master kit that brings together sealing washers, gaskets, valve cores and caps, and 1234yf components in one organized, labeled case. It covers R-12, R134a, and R1234yf service across a wide range of makes, so the right seal, core, or cap is always on hand.
The whole sealing bench, one case
Everything to seal a system, in one box
Truly comprehensive
Sealing washers, gaskets, valve cores, and service caps together — the parts you reach for on almost every A/C repair.
Three refrigerants
Components for R-12, R134a, and R1234yf systems, including the 1234yf-specific caps and primary seals.
Wide make coverage
GM, Ford, Chrysler, Honda, Hyundai/Kia, Caterpillar, Peterbilt, and European applications are all represented.
Tools in the box
Includes valve-core removal tools so you can service cores without hunting for the right driver.
Organized & labeled
Everything is compartmented and labeled for fast identification and fewer wrong-part mistakes.
Pro-grade materials
Built to take the pressures and temperatures of modern automotive and HVAC systems.
Four sealing categories in one kit
Grouped for quick reference:
Sealing washers
Thick, thin, slimline, and Stat-O-Seal washers, including GM color-coded, Honda-specific, and Caterpillar types.
Gaskets
Discharge, suction, and drier gaskets — with and without O-rings — including Chrysler / Nippondenso 10S.
Valve cores & caps
GM/Peterbilt, Ford/JRA import, standard-port, large-bore European, and Hyundai/Kia cores, plus service caps for R-12, R134a, and R1234yf (high & low side, retrofit).
1234yf & tools
1234yf-specific caps and primary seals, plus valve-core removal tools.
Buy a focused kit instead
If you don’t need the full master, these companion kits each cover one area:
Sealing Washer Master · 233-3000
The 48-compartment sealing-washer and gasket master on its own.
View washer kit →Valve Core/Cap/Port · 233-6034
The master valve core, cap, and service-port kit for R134a & R-12.
View core kit →1234yf Caps & Cores · 233-6101
The R1234yf universal service caps and valve core kit.
View 1234yf kit →Kit details
Master sealing kit FAQ
What’s in the kit?
Which refrigerants does it cover?
Who is it for?
Is there a smaller/focused kit?
Shop A/C service kits
Browse O-ring, sealing-washer, and valve-core kits and set your quantities in one place.
| Image | Product Name | SKU | Price | In Stock | Quantity | Add To Cart |
|---|---|---|---|---|---|---|
|
Air Tech Master O-Ring Kit 160 part numbers & 936 pieces | 233-3180 | $197.28 | In stock | ||
|
Master Sealing Washer, Gasket, Valve Core /Cap And 1234YF Cap & Core Kit | 233-3181P | $341.50 | In stock | ||
|
(Most Popular) O-Ring Start Up Kit 48 Compartments | 233-3179 | $50.50 | In stock | ||
|
(Smaller Sizes) O-Ring Master Kit 48 Compartment | 233-3176 | $54.42 | In stock | ||
|
(Medium Sizes) O-Ring Master Kit 48 Compartment | 233-3177 | $54.42 | In stock | ||
|
(Larger Sizes) O-Ring Master Kit 24 Compartment | 233-3178 | $65.18 | In stock | ||
|
1234YF Universal Service Caps and Valve Core Kit | 233-6101 | $99.00 | In stock | ||
|
Sealing Washer Master 48 Compartment Kit | 233-3000 | $197.14 | In stock |
Add the master sealing kit
In stock and ready to ship. Want just one section, or a custom shop assortment? See the focused kits above, or call and we’ll help you choose.
Add to cart ↑ Contact usVehicle and manufacturer names are used for identification only and do not imply affiliation or endorsement. Confirm the correct washer, gasket, core, cap, or seal for your vehicle and refrigerant before installing.
