Are they re-usable? Can I re-use it to connect a different set of wires later? Thanks.

As mentioned, some of the Dielectric grease is displace by the wires and pressed into the wires. If you are adding one more wire to the bunch, I see no reason why you can't reuse in this case as you are adding mass to the cavity. If you want to be anal, you could add more Dielectric grease to the nut and wires (after twisting them) prior to reuse of the wire nut; cost is about $0.50 per nut if you are considering material cost. But in a pinch, if you run out of nuts, you can add Dielectric grease to finish the job.

Does the silicone inside harden over time to help keep the wires inside tight and contained? Thanks!

No the silicone in the wire caps are like Vaseline never gets solid. I have a jar of Vaseline that is around 50 or so years old and it's just like they we bought it.

How many 12 or 16 gauge wires can these hold in one cap? Thanks

I don't know any thing about 12 gauge wire, but for 16 gauge wire it can hold at least 2 .

I need to join a bundle of three #14 stranded copper wire. is the wpconn10 the right choice?

The package lists 2 #14 along with other combinations. 3 #14 is not listed.

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Rain Bird WPCONN10 Waterproof Grease Cap Wire Connectors, 10-Pack, Black/Green

Rain Bird WPCONN10 Waterproof Grease Cap Wire Connectors, 10-Pack, Black/Green

Product ID: 315108451

Details

Colour
Black/Green
Connector type
Snap Connector
Contact material
Silicone
Insulation material
Nylon
Terminal
Twist Terminal

⚡600V surge resistant

💧Silicone gel waterproof seal

☀️UV & chemical resistant

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฿995

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Description

🔌 Seal the deal with waterproof power—connect like a pro!

SILICONE GEL SEALANT - Mess-free waterproofing that protects your wires from moisture and corrosion.
HIGH VOLTAGE ENDURANCE - Built to withstand up to 600 volts, ensuring reliable performance under pressure.
BULK 10 PACK CONVENIENCE - Keep your projects flowing with a ready supply of connectors at your fingertips.
DURABLE UV CHEMICAL RESISTANCE - Designed to last outdoors without degrading from sun or chemicals.
EFFORTLESS ONE STEP INSTALLATION - No pre-twisting needed—just insert and twist for a secure connection.

Rain Bird WPCONN10 Waterproof Grease Cap Wire Connectors offer a quick, mess-free solution for securing valve and controller wires. Filled with silicone gel, these connectors provide a durable waterproof seal that withstands wet conditions, UV exposure, and chemical damage. Rated for up to 600 volts, they ensure safe, long-lasting electrical connections. The 10-pack format is perfect for professionals and DIYers seeking reliable, hassle-free wire management.

Specifications

ASIN	B0046735LO
Brand Name	Rain Bird
Color	Black/Green
Colour	Black/Green
Connector Gender	Female
Connector Type	Snap Connector
Connector type	Snap Connector
Contact Material	Silicone
Contact material	Silicone
Customer Reviews	4.6 out of 5 stars 1,011 Reviews
Global Trade Identification Number	00077985013370
Insulation Material Type	Nylon
Insulation material	Nylon
Item Dimensions L x W x H	34.9L x 34.9W x 25.4H centimeters
Item Type Name	Rain Bird WPCONN10 Waterproof Grease Cap Wire Connectors, 10-Pack
Item Weight	0.01 Ounces
Manufacturer	Rain Bird
Material	Plastic Metal
Material Type	Plastic Metal
Maximum Voltage	600 Volts
Model	N90300
Number of Items	1
Part Number	WPCONN10
Specification Met	Ul 486a
Stud Size	1/2, 3/8
Temperature Rating	40-221 C
Terminal	Twist Terminal
UPC	077985013370
Unit Count	10 Count

Reviews

H**N

17.04.2026

S**R

26.08.2024

M**A

6.12.2019

W**E

13.07.2019

B**R

28.03.2026

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