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 09103 Automotive Windshield Repair Kit For Chipped And Cracked Windshields. Permanent Air-Tight Repairs, With Repair Syringe & Plunger, 9-piece Kit

Product ID: 1747416

Details

Brand
Permatex
Specific Uses For Product
Automotive
Material
Plastic
Compatible Material
Laminated
Item Form
Product

☀️Natural daylight curing

⚙️Spring-lock pressure control

🛠️9-piece all-in-one kit

95.97 DT

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Description

🛡️ Fix your windshield like a pro—no shop, no stress, just crystal-clear results!

SAVE BIG ON REPAIRS - Permanent air-tight fixes up to 1¼" bullseye damage—ditch costly replacements.
EFFORTLESS APPLICATION - Spring-lock syringe auto-controls pressure—no mixing, no guesswork, no experience needed.
SUNLIGHT DOES THE WORK - Skip UV lamps—just 15 minutes in natural daylight seals the repair perfectly.
COMPLETE KIT ZERO HASSLE - Everything you need in one box—tools, resin, and step-by-step photo instructions included.
FLAWLESS CLARITY EVERY TIME - Precision resin restores strength and optical clarity with zero cloudiness or bubbles.

The Permatex 09103 Windshield Repair Kit offers a professional-grade, permanent repair solution for bullseye cracks up to 1¼" on laminated windshields. Featuring a unique spring-lock syringe for precise resin application and curing naturally in daylight, this 9-piece kit includes all necessary tools and instructions to save you hundreds on replacements with a nearly invisible, air-tight finish.

Specifications

ASIN	B000ALJ4MY
Batteries	1 Unknown batteries required.
Best Sellers Rank	#211 in Automotive ( See Top 100 in Automotive ) #2 in Windshield & Glass Repair Tools
Brand	Permatex
Customer Reviews	4.0 4.0 out of 5 stars (13,047)
Date First Available	June 16, 2006
Exterior	Machined
Item Weight	0.01 ounces
Item model number	9103
Manufacturer	Rain-X
Manufacturer Part Number	09103
Model	09103
OEM Part Number	09103
Position	Front
Product Dimensions	1.25 x 6.79 x 3.42 inches
Special Features	Advanced spring-lock feature, natural daylight curing

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95.97 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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