Deacon 990 Injectable Sealant

What is the Deacon 990 Injectable Sealant?

Heat curing, thick fibrous injectable compound. Good travel. Below 550ºF (288ºC), speed up the cure by adding 103-P Accelerator (always use accelerator when sealing boiler feed water). Shelf life is 6 months in closed container. Refrigerated storage recommended.

What are the specifications of the 990 Injectable Sealant?

• Service Rating 250ºF to 950ºF (121ºC to 510ºC)
• 5/8" x 3" Plugs, J-Sticks, 7/8" x 6" Sticks, Bulk Gallons

What are the characteristics of the 990 Injectable Sealant?

• Excellent bridging, cures with heat to a semi-flexible material that will still expand and contract with the joint

Where is the 990 Injectable Sealant used?

• Flanges, enclosures. For use on boiler feed water, condensate, high pressure steam, killing or plugging lines and valves (not for use as a valve packing)

Which Deacon 990 Injectable Sealant do I order?

• J-Stick: part number 111-990 J-STICK
• Gallon: part number 111-990 GALLON
• Plug (Pack of 100): part number 111-990 PLUG

Some options here are sold by the pack and some as a single item, and the price follows the option: Plug (Pack of 100) is pack of 100. Every other option is one item.

What should you check before ordering the 990 Injectable Sealant?

[PROOF: FIELD OBSERVATION, COST COMPARISON OR FAILURE MODE FOR THIS PRODUCT, WITH DATE AND CONDITIONS]

How do I order or get a quote?

PE Energy supplies the Deacon 990 Injectable Sealant from the 2026 manufacturer catalogue. Order the part number for the option you need, or send us the part number with your application details and we return pricing and lead time.