Best DIY Windshield Repair Kit for Home Mechanics

A stone flicks up off the truck ahead and ticks against the glass. By the time you park, a small star break sits in the lower corner of the windshield, too small to book a glass shop around, too visible to ignore. The best DIY windshield repair kit is a small set of resin and an applicator that fills that break at home and seals it against spreading.

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Below: what damage these kits handle, the 4 kits ranked, how to use one, and what to do when the damage is past what a kit can fix.

#	Product	Shop Score	Buy
1	AMNOOVA Windshield Chip Repair Kit	9.7/10	Buy on Amazon
2	WLIIOC Windshield Chip Repair Kit	9.7/10	Buy on Amazon
3	Windshield Chip Repair Kit	9.6/10	Buy on Amazon
4	J-B Weld 2100 Windshield Saver Repair Kit	9.6/10	Buy on Amazon

1

AMNOOVA Windshield Chip Repair Kit

AMNOOVA·9.7/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A windshield chip repair kit with a UV light and an applicator that guides the formula into chips and cracks up to 12 inches.

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Pros

• UV light included, so the resin sets under sunlight or the lamp
• Applicator guides the formula into the damaged spot
• 2 Year Manufacturer warranty
• Handles bullseyes, star-shaped marks and small chips

Cons

• No suction cup mount in the kit
• One bottle in the box
• Formula amount suits occasional minor care only
• Only for minor damage; larger cracks need a glass shop

2

WLIIOC Windshield Chip Repair Kit

WLIIOC·9.7/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 4-piece windshield repair kit with a vacuum holder, suction cup and UV lamp that sets resin in 5-10 minutes on cracks less than 12 inches.

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Pros

• Vacuum holder and suction cup for placing the resin
• UV lamp with 2 timer settings and 2 light modes
• Repairs small damage in 5-10 minutes with no mixing
• Handles cracks less than 12 inches and round damage under 1 inch

Cons

• No warranty term is stated
• Only suits laminated windshields
• Only for damage less than 12 inches
• 4 pieces to store between jobs

3

Windshield Chip Repair Kit

NASILOOP·9.6/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A windshield chip repair kit with a suction cup and 2 bottles of resin for bulls-eye, half-moon and star-shape damage.

Check price on Amazon

Pros

• 2 bottles of resin in the box
• Suction cup holds the kit over the break
• Cracks up to 12 inches; round damage 1 inch across
• Resin flows into fine cracks and bonds after setting

Cons

• No warranty term is stated
• No UV light in the kit
• Round damage is limited to 1 inch across
• 2 bottles to store once opened

4

J-B Weld 2100 Windshield Saver Repair Kit

J-B Weld·9.6/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A small windshield repair kit from J-B Weld for small chips and star breaks on laminated windshields.

Check price on Amazon

Pros

• Made for all laminated windshields
• Minimizes the appearance of chips and star breaks
• Keeps small damage from spreading further
• Easy-to-use system for small damage repairs

Cons

• No warranty is given
• Single 0.025 fl. oz tube in the box
• Only for small damage; larger breaks need a glass shop
• No suction cup mount in the kit

Best DIY Windshield Repair Kit: What These Kits Handle

The kits in this guide all work the same way: resin fills the break and seals it. Between them, the kits cover small chips, bulls-eye breaks, half-moon crescents and star breaks, with cracks up to 12 inches long where a length is stated.

• Damage size. Chips and cracks up to 12 inches where a length is stated; round damage is limited to 1 inch across on the kits that state a 1-inch limit, and 1-1/4 inches on the J-B Weld kit.
• Light. 2 of the kits include a UV light; check the box contents of the others before ordering.
• Mount. Two of the kits use a suction cup or vacuum holder to keep the applicator over the break.
• Glass type. 2 of the kits state they suit laminated windshields.

Best DIY Windshield Repair Kit Picks for Home Mechanics

The 4 kits below all fill the break with resin; they differ in how the resin is placed and what the box includes.

How to Use a Windshield Repair Kit

Read the instructions in your kit before starting, since each kit names its own order.

1. Clean and dry the glass. Start with a clean, dry surface around the break.
2. Place the applicator over the break. Set the suction cup or vacuum holder over the chip where the kit includes one, so the resin feeds into the break.
3. Squeeze the resin into the crack. Guide the resin into the damaged spot.
4. Cover with the film where the kit includes one. Apply the film over the filled break, as the kit directs.
5. Set the resin with light. Use the UV lamp where the kit includes one, or sunlight where the maker allows it. One kit with a lamp lists 5-10 minutes, with a choice of 2 timer settings.
6. Scrape off the leftover resin where the kit includes a scraper. Remove the leftover resin with the scraper, as the kit directs.

What These Kits Cannot Fix

A kit is for small damage. A crack longer than 12 inches is past the longest range any kit here states, and damage with no single break to fill is past what resin can do. In those cases a glass shop is the next step.

FAQ: garage tools

Can a DIY kit fix a cracked windshield?

Yes, if the crack is small. Between them, the kits here handle small chips and cracks up to 12 inches where a length is stated, and round damage up to 1 inch across on the kits that state a 1-inch limit; the J-B Weld kit states 1-1/4 inches. A crack past 12 inches needs a glass shop.

How long does a windshield chip repair take?

The kit that states a time lists 5-10 minutes for small damage, once the glass is clean and dry. Allow the time the instructions in your kit state.

Is sunlight needed to set the resin?

Not always. A kit here sets its formula under sunlight or a UV light, and 2 of the kits include a UV light in the box.

What kinds of windshield damage can a kit handle?

Between them, the kits cover small chips, bulls-eye breaks, half-moon crescents, star breaks and short cracks, with cracks up to 12 inches where a length is stated.

Will the repair disappear completely?

No kit here promises that. The makers state the resin minimizes the appearance of the damage, and a maker describes the result as near new condition.

Can a kit be used on any windshield?

The kits that state a limit are made for laminated windshields. Check the instructions in your kit if your glass is anything else.

Related: bumper crack repair kits and plastic repair welder kits.