Will this adhere to plastics to form a gasket

Yes, asssuming the substrate is clean. Please make sure that blue is the strength rating you want as it is one of the weakest "less permanent" types of gasket maker.

I intend to use this to repair a pentair 2" multiport valve spider gasket. will i be able to take the valve apart again if needed after using this?

You do need to be careful applying this product as it sets up quick & is very messy, so make sre you have a rag nearby. I think I may have put too much on & would spply it more sparingly. There are Youtube videos showing proper installation. You can remove the top of the valve for inspection, however, it may be difficult to remove the gasket without damaging it & it would be more difficult to clean the the gasket than to teplace it with a new one. Once it is on, there should be no need to remove it.

How long will it last ?

RTV silicone is made for use with cars or trucks not a home water system or portable water system you need to purchase a user friendly silicone

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Description

🛠️ Seal Like a Pro, Drive with Confidence!

SENSOR SAFE FORMULA - Coats pre-cut gaskets without fouling oxygen sensors—perfect for modern vehicles.
DURABILITY THAT LASTS - Resists cracking, shrinking, and migrating to ensure long-term reliability.
VERSATILE APPLICATION - Ideal for valve covers, oil pans, timing covers, water pumps, thermostat housings, and transmission pans.
UNIVERSAL FIT FOR EVERY JOB - Effectively replaces almost any cut gasket, making repairs seamless and hassle-free.
UNMATCHED THERMAL ENDURANCE - Withstands extreme temps from -65°F to 500°F, keeping your engine sealed under pressure.

Permatex 80022 Sensor-Safe Blue RTV Silicone Gasket Maker is a high-performance, universal-fit silicone sealant designed to replace cut gaskets with durable, formed-in-place seals. It resists cracking, shrinking, and fluid damage while operating reliably across a wide temperature range (-65°F to 500°F). Its sensor-safe formula ensures no interference with oxygen sensors, making it ideal for critical automotive applications such as valve covers, oil pans, and transmission pans.

Specifications

Brand	Permatex
Specific Uses For Product	Automotive, Industrial, Mechanical
Material	Silicone
Item Form	Liquid, Pen, Stick
Special Feature	High-temperature resistance, pressure resistance, thermal cycling resistance, and formed-in-place gasket creation
Color	Blue
Item Package Quantity	1
Package Information	Tube
Viscosity	High
Water Resistance Level	Water Resistant
Unit Count	3.0 Ounce
UPC	686226800220
Number of Pieces	1
Global Trade Identification Number	00686226800220
Manufacturer	Permatex
Model	Permatex 80022
Item Weight	1.6 ounces
Product Dimensions	1.25 x 3.81 x 8 inches
Item model number	80022
Is Discontinued By Manufacturer	No
Exterior	Painted
Manufacturer Part Number	80022
OEM Part Number	80022
Special Features	High-temperature resistance, pressure resistance, thermal cycling resistance, and formed-in-place gasket creation
Voltage	12 Volts
National Stock Number	8030-01-323-4503

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