Conformal Coating Stripper FAQ

How do I remove conformal coatings from PCBs?

It depends on the coating’s chemistry. For thermoplastic materials such as acrylics or silicone coatings, the cured film can easily be removed with common solvents like acetone or n-butyl acetate. For more durable thermoset coatings such as polyurethane, epoxy and UV cure, use a more aggressive stripper like MG’s 8309 liquid or 8310A gel. The table below summarizes most effective methods for removing coatings of different chemistries.

Material                                      Method
AcrylicsEasily removed using common solvents like Ketones (e.g., acetone) or esters.
PolyurethanesCan be removed using 8309 or 8310A stripper. Takes 5-10 minutes.
SiliconesEasily removed using common solvents like acetone or esters.
EpoxyRemove using 8309 or 8310A stripper. May take up to 2 hours.
UV CureRemove using 8309 or 8310A stripper. May take several hours.
ParyleneMust be removed with micro-abrasion. Very difficult.
Ultra-ThinEasily removed using common solvents like Ketones
Styrenated Block co-polymerEasily removed using common solvents like Ketones