Does this also work on my iphone

Only if you glue the iPhone to the windshield of your car first.

This thing just fills the resin to make the crack less visible, am I correct? It doesn't really prevent the crack to run any further, right?

Incorrect. It actually does help prevent the spreading of the cracks (depending on the size of the damage). If the damage is contained within the circular area of the applicator tool, you should be good to go. But if the damage extends beyond the boundry of the applicator, extra steps or applications could be needed. This resin works especially well to prevent further spidering due to extreme temperature changes.

Can this product be used on a house window?

As an addendum to my answer, I want to add the fact that windshield repair resins come in various viscosities. The #25 resin is a good, all around viscosity, but the higher the #, the less visible the crack will be after the repair, but the more difficult it will be to introduce the resin into the crack. As a rule of thumb, the thicker densities should only be used on hot days when their viscosity is reduced. What I would do is first try using a higher viscosity resin for a crack, like 50 for example. I would continue using it as long as it flowed evenly into the crack, but when I reached a point where the crack was so narrow that 50 stopped filling the crack entirely, I would switch over to 25, and sometimes even thinner on cold days. Getting at least some resin into the crack is better than not getting any at all.

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Permatex 16067 Bullseye Windshield Repair Kit.025 oz. Syringe

Product ID: 258211060

Details

Brand
Permatex
Specific uses for product
Automotive
Material
Plastic
Compatible material
Glass
Item form
Liquid

🔒Advanced spring-lock delivery system

☀️Resin cures naturally in sunlight

🛠️Permanent airtight repair ≤1.25"

$56.84

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Description

🛡️ Seal the crack, save the ride—repair like a pro!

PRECISION DELIVERY - Redesigned syringe with spring-lock for mess-free application
ALL IN ONE REPAIR KIT - Complete with step-by-step photo instructions for instant confidence
SUNLIGHT POWERED CURE - Eco-friendly resin that hardens naturally under daylight
DAMAGE CONTROL MASTERY - Seals bullseye and star cracks up to 1 1/4"—keep your windshield flawless
FLAWLESS FIX IN MINUTES - Professional-grade repairs with zero mixing hassle

The Permatex 16067 Bullseye Windshield Repair Kit offers a professional, permanent airtight fix for bullseye and star windshield damage up to 1.25 inches. Featuring a state-of-the-art spring-lock syringe, this all-in-one kit requires no mixing and cures naturally in sunlight, making it the go-to solution for quick, reliable windshield repairs with easy-to-follow photo instructions.

Specifications

ASIN	B000ALJ4MY
Batteries	1 Unknown batteries required.
Best Sellers Rank	#12,807 in Automotive ( See Top 100 in Automotive ) #23 in Automotive Windshield & Glass Repair Tools
Brand	Permatex
Customer Reviews	4.0 4.0 out of 5 stars (12,853)
Date First Available	7 August 2012
Exterior	Machined
Item Weight	0.28 g
Item model number	9103
Manufacturer	Rain-X
Manufacturer Part Number	09103
Model	09103
OEM Part Number	09103
Position	Front
Product Dimensions	3.18 x 17.25 x 8.69 cm; 0.28 g
Special Features	Easy-to-follow instructions with photographs

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$56.84

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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