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Wednesday, April 27, 2016

Powercrete J Application Instructions

How To Apply Powercrete J

Power crete J

The "Standard Kit" contains an installation guide, SDS and a 2 part epoxy coating (Powercrete J) in premeasured kits.  Part A (the large container) is the base and Part B (smaller container) is the curing agent.  
Power crete J
Insure that surfaces are clean of grease, oils, salts and other contaminents.  If necessary, use Acetone, MEK or other suitable solvent.  Perform cleaning when pipe is 3C above the dew point.

powercrete J
Blast clean surfaces to be coated with Powercrete J to a near white SIS Sa 2 1/2 or white SSPC-SP 5 using particle blasting.  Sweep blast adjacent FBE or CTE coating 50mm to either side of the cutback (the bare steel area).

Power crete J
A 70 to 80 micron (2.7 to 3 mil) surface profile is ideal.  Burnishing or polishing must be avoided.  Surface preparation can be controlled using surface profile tape.  Dry surface and insure ideal surface preparation. 
Power crete J
While not always necessary when applying Powercrete J, preheating can be useful just prior to application:  A: To eliminate moisture, preheat the cutback area to approximately 40C and B: to accelerate curing, preheat the cutback area to approximately 90C.

Power crete J
Warm parts A & B of the Powercrete J to 20C and mix by pouring all of part B into part A.  Thoroughly scrape container and lid of B.  Slowly begin mixing to avoid introducing air into the mixture.

Power crete J
Use a mixing speed when mixing the Powercrete J that uniformly blends the 2 parts, but does not create a vortex in the mixture or spillage.

Power crete J
 Reconfirm that the temperature is above 10C and 3C above the dew point.  Then slowly pour the Powercrete J (mixed) onto the pipe. 

Power crete J
 Use trowels, brush or roller to apply required minimum thickness of coating to the field joint.  Cover at least 50mm of the adjacent mainline coating. 

Power crete J
 Use a wet film gauge to measure that the desired thickness of Powercrete J has been achieved.  Double check around the weld to insure minimum desired thickness. 

Power crete J
 The curing rate for the Powercrete J will vary according to pipe and ambient application temperature.  Refer to a curing chart for Powercrete J to determine when to perform a Shore D check. 

Tuesday, April 26, 2016

Powercrete J and Powercrete R65/F1 Now In Stock

In Stock Powercrete Shipping

     Joint Specialists is proud to announce that we are now stocking and shipping (same day shipping on Powercrete) Powercrete J and Powercrete F1 in multiple different sizes. 

     Powercrete J is a solvent free epoxy polymer concrete mainline pipeline coating operating at a maximum temperature of 60C (140F).  Used for pipeline repairs and rehabilitation projects and other other steel structures, Powercrete J is used as a girth weld coating for FBE and CTE coated pipelines. 

  • 100% Solids Epoxy
  • no VOC
  • Exceeds AWWA C210
  • Excellent adhesion to FBE and CTE
  • Excellent Mechanical Properties
  • Suitable for pipeline operating temperatures to 60C
  • Exceptional adhesion and soil stress resistance on bare steel
  • Can be sprayed and hand applied up to 20 mils in one multi pass layer
General Application Procedure for Powercrete:
  • Area to be coated with Powercrete has to be clean, dry and free from oil, grease and dust.  All contamination that could interfere with the adhesion of the coating has to be removed according to SSPC-SP1.
  • Prior and during surface preparation, the temperature of the substrate must be at least 5F above the dew point.
  • Abrasive blasting should be to minimum SA 2 1/2 (SSPC-SP10/Nace2)
  • 3-4 mil recommended surface profile.
General Powercrete J Information:
  • Powercrete J Color:  Brown
  • Powercrete J Finish:  Glossy
  • Powercrete J is self priming
  • Coverage rate for Powercrete J is 81.5 square feet per gallon at 20 mils thickness
  • 100% Solid
  • Flash point of Powercrete J: >200F
  • Mixing ratio of Powercrete J: 4.8: 1 (a to b)
  • Potlife of Powercrete J is 20 minutes at 77F
  • Powercrete J Gel Time 30 minutes
  • Dry time of Powercrete J 1.7 hours
  • 65 Shore D is generally met within 4.2 hours
  • 75 Shore D is generally met in 5.2 hours (this is a full cure of Powercrete J)
Kit Sizes for Powercrete J:
20 pound Kit (1.32 gallons)
10 pound kit Powercrete J (.66 gallons)
5 pound kit Powercrete J (.26 gallons)
2 pound kit Powercrete J (.13 gallons)


Monday, April 25, 2016


DIRAX for Corrosion Protection System for Directional Drilling and Crossing

     This report states the requirements and test methods for heat shrinkable wrap around sleeve systems to be used in directional drilling applications for corrosion protection and sealing of joints in pipe structures with a maximum operating temperature of 60C or less.

    The DIRAX system comprises two heat shrinkable wraparound sleeves closed with a patch closure and a two component solvent free epoxy primer.  The main sleeve is fabricated from a minimal 1.4mm thick irradiation crosslinked thermally stabilized, fiberglass reinforced heat shrinkable woven polyolefin backing that is coated internally with a minimal 1.0mm thick high performance hotmelt adhesive.  Adhesion to bare steel pipe surfaces is enhanced by the application of the primer. 

     The sleeve is closed using a special low profile closure patch.  The closure provides sufficient strength to withstand the shrink forces during installation. 

     The main sleeve edge profile that enters the soil first is smoothed by the application of an additional narrow wrap around sleeve of the same construction as the main sleeve. 

     The systems are installed using propane gas torches.  First the primer is mixed and applied.  While still wet, the wraparound sleeves are shrunk down onto it.  When heated above 125C, the sleeves shrink tightly around the substrate onto the wet primer. During recovery, the adhesive softens and flows to form an intimate bond with the primer and curing of the primer is initiated.  The bond strength builds up during cooldown and is fully retained after completion of the job. 

     The heat shrinkable sheets are manufactured from a radiation crosslinked, thermally stabilized, UV resistant heat shrinkable fabric, composed of a fiberglass reinforcement and polyolefin fibers embedded in a polyolefin matrix. 

     The inner surface of the heat shrinkable sheets is coated with a controlled thickness of a hotmelt adhesive.