Deacon 990 Injectable Sealant

Description

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.

How does this grade compare with the rest of the Deacon range?

Across the 55 Deacon injectable sealants and compounds PE Energy stocks, this one is rated 250°F to 950°F (121°C to 510°C). That places it above 22 of the other 54 on upper service temperature: HF-700 Rubber Compound stops at 700°F, and 909 continues to 1000°F.

Deacon publishes these ratings one product page at a time, so the comparison above is the part that is hard to assemble before you order. If your service condition sits near a boundary, send us the temperature and the medium with your enquiry and we will confirm the grade against the 2026 manufacturer catalogue before quoting.

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.