Gilligan
Contributor
I spoke with Jason Bradley, a professional photographer at Backscatter.com regarding Olympus PT-010 main O-ring grease.
He stated the main O-ring is made of silicone rubber and therefore pure silicone grease cannot be used on it. The O-ring will absorb the grease and it will break it down resulting in the O-ring stretching.
Jason went on to explain the Olympus grease is not pure silicone grease. The Olympus tube states "SILICONE GREASE, ONLY FOR SILICONE RUBBER O RINGS". This does not mean the grease is silicone grease but instead means it is grease for silicone O-rings. He said the O-ring grease for the blue Sea & Sea O-rings is okay to use on Olympus O-rings because the Sea & Sea O-ring is also silicone rubber and their grease is compatible.
I have 64 dives on my current PT-010 with the original O-ring. It shows no signs of stretching. I use only the Olympus grease on the main O-ring.
I got about 50 dives on my older PT-010 before the O-ring stretched out to the point it would not stay in the groove and had to be changed. I used generic pure silicone grease on those O-rings
Does this all make sense!
Any O-ring experts want to reply?
He stated the main O-ring is made of silicone rubber and therefore pure silicone grease cannot be used on it. The O-ring will absorb the grease and it will break it down resulting in the O-ring stretching.
Jason went on to explain the Olympus grease is not pure silicone grease. The Olympus tube states "SILICONE GREASE, ONLY FOR SILICONE RUBBER O RINGS". This does not mean the grease is silicone grease but instead means it is grease for silicone O-rings. He said the O-ring grease for the blue Sea & Sea O-rings is okay to use on Olympus O-rings because the Sea & Sea O-ring is also silicone rubber and their grease is compatible.
I have 64 dives on my current PT-010 with the original O-ring. It shows no signs of stretching. I use only the Olympus grease on the main O-ring.
I got about 50 dives on my older PT-010 before the O-ring stretched out to the point it would not stay in the groove and had to be changed. I used generic pure silicone grease on those O-rings
Does this all make sense!
Any O-ring experts want to reply?