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PRK-99 | Intake Port-Reshaping Kit

PRK-99 | Intake Port-Reshaping Kit


Withstands up to 500 degrees! Modify ports for hi-performance by adding material in the right places.

Superior formula uses 2-part epoxy that won't shrink when dry. Mix ratio is 1:1 by weight. Mix and knead the parts together by hand until the black and yellow colors have combined to make a uniform olive green color. 

Working time at 70ºF: Golfball size 40 minutes max.; Baseball to softball size 30 minutes max.

Cure time at 70ºF: Full hardness in 6 to 8 hours. Once cured it forms a hard coating resistant to abrasion, impact, water, chemicals and solvent.

Kit includes epoxy, gloves and mixing sticks. Yields 16 oz. of material. 24 month shelf life.

View or download the Safety Data Sheet.

Tech Tips from the Techxperts

Adhesion of PRK-99 Intake Port Reshaping Material will only be as good as the cleanliness and soundness of the substrate. Remove all dirt, oil and grease. Sandblasting is acceptable. Scraping, wire brushing and other manual cleaning methods may also work. NOT for use in contact with potable water or exhaust ports.


Proposition 65 Warning WARNING: This product can expose you to chemicals including Carbon Black, which is known to the State of California to cause cancer. For more information go to

More information


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 -