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Alltrade Supply Inc
Quality products since 2014
7/8"–2.5" Silicone Blind Hole Plugs Push-In Auto Firewall Panel Choose Size
Each order contains one selected size only. This is not an assortment.
If you need multiple sizes, add each required size to your cart before checkout.
Product Description
Seal unused panel openings with durable silicone blind hole plugs.
Designed for automotive firewalls, body panels, electrical enclosures,
and equipment cabinets.
High temperature silicone remains flexible over time.
Resists heat, moisture, UV exposure, and vibration.
Tool-free push-in installation creates a clean finished appearance.
Select the plug size that matches your panel hole diameter.
Each plug is sized by the hole it fits.
Choose the required size from the drop-down menu before checkout.
Specifications
Hole fit: Choose size (see drop-down for available options)
Material: Black silicone rubber
Hardness: 50–55 Shore A
Design: Blind hole plug / solid panel plug
Head style: Flat, flush-mount
Stem type: Smooth push-in compression stem
Function: Hole sealing, dust protection, moisture barrier
Surface types: Steel, aluminum, painted body panels
Use environment: Automotive, outdoor, high-temp areas
Operating temperature: -40 °C to 200 °C (-40 °F to 392 °F)
Hole Size
Top Diameter
Flange Thickness
Length of Stem
7/8”
1 1/8”
1/8”
.350
1”
1.200
1/8”
.350
1 1/8”
1 3/8”
1/8”
3/8”
1 1/4"
1 1/2"
1/8”
3/8”
1 3/8”
1 11/16”
1/8”
3/8”
1 1/2"
1 3/4"
1/8”
3/8”
1 7/8”
2 1/8”
.140
1/2"
2”
2 1/4”
.140
1/2"
2 1/2”
2 3/4"
.155
.600
7/8" hole – Head 1-1/8" – Stem 0.35"
1" hole – Head 1.20" – Stem 0.35"1-1/8" hole – Head 1-3/8" – Stem 0.38"
1-1/4" hole – Head 1-1/2" – Stem 0.38"
1-3/8" hole – Head 1-5/8" – Stem 0.38"
1-1/2" hole – Head 1-3/4" – Stem 0.38"
1 7/8" hole Head 2 1/8 – Stem 0.38"2" hole – Head 2-1/4" – Stem 0.50"2-1/2" hole – Head 2-3/4" – Stem 0.60"
Key Uses
Automotive firewall hole sealing
Body panel closure and restoration
Engine bay cleanup and sealing
Interior bulkhead closure
Off-road and powersports repair
Common Applications
Firewall and engine bay openings
Inner fender and body panel holes
Cab bulkheads and interior panels
Automotive restoration and rebuild projects
ATV, UTV, and motorcycle body panels
Marine bulkheads and equipment panels
Package Options
• Multiple sizes available – choose from 10 hole size options
• Each pack contains one selected size only (not an assortment)
• To order multiple sizes, add each required size to your cart before checkout
Service
Ships from California, USA warehouse
Same-day handling on most weekday orders
Tracking uploaded quickly after shipment
51,000 buyers' reviews
99.8 percent positive response
Free shipping with tracking included
$9.85
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$24.5
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$11.75
$10.29
$10.95
$13.5
$10.75
$55 Add suggested items to your listings - Check it out on 3Dsellers.com ShippingPaymentReturns
We ship every day Monday - Friday.
PayPal is the preferred payment method.
We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.
We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.
We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.
We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.
We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.
We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.
Featured Products
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These silicone blind hole plugs are designed to seal unused openings in automotive firewalls, body panels, and enclosures where a secure, flush fit is required. Sized by hole diameter from 7/8" to 2-1/2" (22–64 mm), each plug installs with a smooth push-in stem and forms a tight compression seal without tools.
High-grade silicone maintains flexibility and sealing force under heat, vibration, and outdoor exposure. Unlike lower-cost rubber, it resists hardening, cracking, and shrinkage, making it ideal for engine bays, restoration work, and long-term sealing applications.
Commonly used by automotive technicians, restoration shops, and powersports repair professionals for firewall sealing, body panel repair, and enclosure closure. Designed for MRO teams and technicians working in inch and metric systems.
