DO NOT USE WD-40. WD-40 WILL DAMAGE O-RINGS AND SEALS.

LACO oil is the most advanced product for plunger cup seals. It's special
anti-foam, anti-wear blend, conditions seals and prevents drag.

Directions for Use:  
Lubricate with 3-5 drops of LACO
HI PERFORMANCE OIL.  Oil pump by
unscrewing end cap and place oil
on rubber cup or through air hole
in end cap.  Assemble pump, then pump
several times to distribute oil evenly.