Is this the same as SP-20?

It is not the same, however, PAG 46 is also for R134a systems

If I use this in my auto a/c, do I have to also buy a refrigerant with (additional) dye to test for leaks? or is this a one and done for the dye?

This has the dye included. But to check for leaks you still need the light and glasses or you can take to a shop who has these

Can this product soluble in 3M FC72?

Hello, is for R134a A/C systems

Is this the same SP-10?

Hello, You could use SP-15. SP-15 is compatible with SP-10. Here the link https://www.amazon.com/dp/B0B5LTSZHF?ref=myi_title_dp.

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P46-32D PAG 46-Viscosity Plus U/V Dye Oil - 32 oz

P46-32D PAG 46-Viscosity Plus U/V Dye Oil - 32 oz

Product ID: 301474693

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Details

Material
Synthetic
Brand
TSI Supercool
Package Information
Bottle
Liquid Volume
32 Fluid
Item Weight
975 g

🔦Built-in U/V Dye for Leak Detection

🌡️Flash Point 442°F for Extreme Heat Resistance

🛠️46 Viscosity High-Performance Synthetic PAG

Description

❄️ Keep your cool with the ultimate A/C lubricant—because your ride deserves the best!

SUPERIOR MOISTURE RESISTANCE - Advanced formula protects your system from moisture damage and corrosion.
UV DYE FOR INSTANT LEAK DETECTION - Spot hidden leaks fast with vibrant U/V dye—stay ahead of costly repairs.
ANTI OXIDANTS COMBAT SLUDGE BUILD UP - Keeps your compressor clean and efficient, extending system life.
PRECISION ENGINEERED FOR R 134 A SYSTEMS - Optimized synthetic PAG oil ensures peak A/C compressor performance and longevity.
HIGH FLASH POINT FOR SAFETY DURABILITY - Withstands extreme temperatures up to 442°F without breaking down.

TSI Supercool P46-32D is a 32 oz synthetic PAG 46 viscosity oil designed for R134a automotive A/C systems. Featuring a high flash point of 442°F and integrated U/V dye, it offers superior moisture resistance and anti-oxidant protection to prevent sludge and extend compressor life, meeting OEM performance standards.

Specifications

Material	Synthetic,Plastic
Brand	TSI Supercool
Package Information	Bottle
Liquid Volume	32 Fluid Ounces
Item Weight	975 g
Recommended Uses For Product	Lube
Upper Temperature Rating	1.4E+2 Degrees Fahrenheit
Flash Point	442 Degrees Fahrenheit
Specific Uses For Product	Automotive Air Conditioning System Maintenance
Item Form	Oil
Manufacturer	SUPERCOOL
Net Quantity	946.352 Milliliters
UPC	672264003884
Number of Items	1
Model number	P46-32D
Product Dimensions	22.35 x 8.64 x 8.13 cm; 975.22 g
Item model number	P46-32D
Item Height	3.2 Inches
Item Width	3.4 Inches
Included Components	Unit^Instruction Guide
Are batteries included?	No

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