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< back to home | Sherwin Products - Penetrant

Sections on this page - Visible Penetrant products | Fluorescent Penetrant products

Sherwin Incorporated has manufactured its Dubl-Chek line of liquid dye inspection penetrants and related products since 1964.

Dubl-Chek products are approved by governing agencies worldwide, including the US Government, ASME, ASTM, as well as the prime aerospace and military contractors and OEM's. Dubl-Chek fluorescent penetrants are used widely in aerospace, while Dubl-Chek visible penetrants are used throughout the welding and nuclear power industries.

VISIBLE PENETRANT PRODUCTS
Approved to MIL-I-25135 & AMS-2644

Visible Penetrants
DP-40 Nonwater-washable, use with emulsifier or solvent wipe-off
DP-51 Water-washable, remove with water or solvent
DP-54 Water-washable, contains no petroleum distillates, more acceptable to sewage treatment facilities. Remove with water or solvent
K-017 Specially formulated and approved for high temp applications, such as welds. Use with Hi-Temp K-019 Cleaner and with D-350 or D-100 Developers.
By-Lux Dual response: indications are red under normal light; orange under black light

 

Removers/Cleaners
DR-60 Clear non-chlorinated solvent for pre-cleaning and penetrant wipe-off.
DR-62 Similar to DR-60; evaporates more readily
K-019 Foam cleaner especially formulated for use at high temperatures. Use with other Hi-Temp products. Also, use when wide, shallow cracks are suspected

 

Emulsifiers for Visible Penetrants
ER-85 Method B, lipophilic, oil-based. Use with nonwater-washable penetrants
ER-83A Method D, hydrophilic, detergent-based, "non-aggressive." Use after plain water pre-rinse to emulsify nonwater-washable penetrants

 

Developers for Visible Penetrants
D-100 Nonaqueous, "form d," alcohol suspension, spray application
D-106 Nonaqueous, "form d," similar to D-100, evaporates more readily; spray application
D-350 Approved: use with other Hi-Temp products on heated surfaces

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FLUORESCENT PENETRANT PRODUCTS
Approved to MIL-I-25135 & AMS-2644

Water Washable Fluorescent Penetrants
Level/2 HM-1 For relatively non-critical work
Level 1 HM-2D Recommended for magnesium and aluminum casting with difficult surfaces
HM-220 Free rinsing; use on difficult surfaces. No petroleum distillates
WB-100 Water-based; environmentally friendly. Also shipped as concentrate; user adds water
Level 2 HM-3A Versatile, general purpose material; used extensively on Al and Mg castings; competitively priced
HM-406 Widely used in aerospace on magnesium, aluminum and titanium castings and extrusions. More sensitive than HM-3A.
HM-412 - Similar to HM-406, only more sensitive
HM-420 - Free rinsing. Contains no petroleum distillates
HM-602 - Resists over-washing. Contains no petroleum distillates
WB-200 - Water-based; environmentally friendly. Also shipped as concentrate; user adds water
Level 3 HM-430 - High sensitivity; formulated for rough surfaces
HM-604 - Widely used. Competitively priced. No petroleum distillates. Resists over- washing
HM-607 - Similar to HM-604 except slightly more sensitive
Level 4 HM-704 - Ultra-high sensitivity. Used on smooth surfaces. No petroleum distillates

 

Nonwater-Washable Fluorescent Penetrants
Level 1 RC-29 - Competitively priced
Level 2 RC-50 - Widely used
Level 3 RC-65 - Also in spray cans
Level 4

RC-77 - Also in spray cans
RC-88 - Ultra-high sensitivity; increases visibility of microscopic flaw indications

 

Emulsifiers for Fluorescent Penetrants - Methods B & D
ER-85 Method B lipophilic, oil-based, used in post-emulsification processes
ER-83A Method D hydrophilic, detergent-based, "non-aggressive," used after plain-water Pre-rinse, recommended for use with RC-77 on highly critical rotating parts

 

Cleaners and Removers for Fluorescent Penetrants - Method C
DR-60 Clear, non-chlorinated solvent for pre-cleaning and penetrant wipe-off.
DR-62 Similar to DR-60; evaporates more readily
LA-1 Alkali-based, hot tank pre-cleaner. Replaces solvent-based pre-cleaners

 

Developers for Fluorescent Penetrants
D-90G Dry powder, "form a," excellent surface cling
D-100 Nonaqueous, "form d," alcohol suspension, spray application.
D-106 Nonaqueous, "form d," similar to D-100, evaporates more readily; spray application.
D-113G.1 Water soluble powder, "form b," normally used with nonwater-washable penetrants
D-110A.1 Water suspendable powder, "form c."

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