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GLO-1 : GLO-2 : GLO-3 : GOODSON Glow Crack Detection Sprays : GOODSON

GOODSON Glow Crack Detection Sprays


Use the GOODSON Glow Crack Detection sprays to find surface cracks in cast iron and aluminum.

GOODSON Glow Cleaner (GLO-1) is used to pre-clean area to be checked by spraying thoroughly only. Wipe clean and repeat if necessary. Do not abrasive clean area as it closes cracks

GOODSON Glow Penetrant Dye (GLO-2) is used to show where cracks may be. Generously spray on pre-cleaned area to be checked. Allow penetrant dye to stand 1 to 5 minutes for normal cracks and 20 minutes or more for extremely fine cracks. After penetration time, Wipe off excess dye to avoid false readings. To remove excess dye, spray cleaner (GLO-1) on clean shop towel, and wipe area.

GOODSON Glow Developer (GLO-3) is used to develop the dye color. Shake can well until agitator rattles. Spray a thin even layer of developer over entire area to be inspected. Several light applications are better than one heavy application. Allow developer 30-60 seconds to dry thoroughly. INSPECT for location of crack indicator as a florescent yellow. Inspect: Under black light, cracks will show up as bright, glowing florescent yellow on white background.

Download the Safety Data Sheets: GLO-1 | GLO-2 | GLO-3

A Hazardous Materials Fee is required to ship by air. Please call or email Goodson for more information.


Proposition 65 Warning WARNING: This product (GLO-1) can expose you to chemicals including Ethyl Benzene, which is known to the State of California to cause cancer. For more information go to

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Order No. Description Price Quantity
GLO-1 Cleaner | GLO-1 $22.99
GLO-2 Penetrant | GLO-2 $30.99
GLO-3 Developer | GLO-3 $48.99

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To return an item:
1. Write a brief note describing the reason for the return. Please be sure to include your name or company name or account number.

2. Return the item freight prepaid within 60 days from the invoice date. For best results, please ship return merchandise by UPS or Federal Express. Please keep your receipt because it may be necessary to track the package if it is lost in transit.

3. A 10% restocking fee applies on all returns unless the problem was the fault of Goodson. If so, the restocking charge is waived and shipping costs are reimbursed. Credits will be made to the account originally billed.

Send the completed Product Return Form along with the product to:

Goodson Shop Supplies
156 Galewski Drive
Winona, MN 55987

Read our complete return policy.


Goodson strives to ship orders the same day they are received. In fact, we track this on a daily basis and we are currently shipping 99.97% of orders on the same day.

We use most major carriers including FedEx, UPS, USPS and regional carrier, SpeeDee.

For more information, check out our Shipping & Delivery page.

International Sales

Goodson ships F.O.B. Winona, Minnesota, USA to most countries around the world. To find a distributor near you visit our Distributor Listing.

If there is not a distributor in your area, you can contact Goodson by phone (1-507-452-1830) or order online. Please note some items (such as Sunnen) are not available for shipping outside of the United States & Canada. If you have these items in your shopping cart, your order cannot be processed. You must remove those items from the cart to continue.

Proposition 65 Information

"Proposition 65 requires businesses to provide warnings to Californians about significant exposures to chemicals that cause cancer, birth defects or other reproductive harm." -  

So, what does this mean for Goodson customers? It means that many of common products used in manufacturing contain products known to the state of California to cause cancer and/or reproductive harm. Components such as stainless steel, galvanized wire, brass, bronze, etc. can be found in the Prop 65 list and require us to provide the warning. 

You can find a complete list at the Proposition 65 website.

Proposition 65 WarningWARNING: Cancer and Reproductive Harm -