Silicone rocker cover gaskets

Andy Higham · 2026-03-01T05:36:19-0700

£45 + VAT (I get it back) will get 1m x 0.5M. How many gaskets out of that?
Scalpel, a hole punch and a little bit of care

Fast Eddie · 2026-03-01T10:02:55-0700

Andy Higham said:
£45 + VAT (I get it back) will get 1m x 0.5M. How many gaskets out of that?
Scalpel, a hole punch and a little bit of care

Book your slot in A&E for stitches now mate

Reminds me of a shopping trip to Halfords a while back….

I asked the 12 year old behind the counter if they stocked gasket paper.

He answered “what’s the make and model of the vehicle sir”? I jest not.

There followed a brief Monty Python style chat as I tried, in vain, to explain.

Eventually the manager came out, I asked him and he almost laughed as he said “Ohhh! No-one does that these days sir” as if I wanted to make a flint axe !!

If I cudda reached over I’d have written “chocolate” and “teapot” on their respective name badges !!

Andy Higham · 2026-03-01T10:25:41-0700

Cutting rocker box gaskets will be easy, I timing cover gasket somewhat more difficult.
A pair of sharp scissors may get close to the shape, punch the bolt holes then assemble the gasket and rocker covers and nip up.
Then trim the gaskets in place using a scalpel

NorTriDuc · 2026-03-01T15:40:33-0700

Andy Higham said:
Cutting rocker box gaskets will be easy, I timing cover gasket somewhat more difficult.
A pair of sharp scissors may get close to the shape, punch the bolt holes then assemble the gasket and rocker covers and nip up.
Then trim the gaskets in place using a scalpel

The old hammer wacker using the metals edge will cut the gasket material.

jseng1 · 2026-03-01T18:00:22-0700

An exacto knife works but you have to be very carefull. An electric engraving tool with a sharpened blade instead of a point works best. A hole punch or piece of sharpened tubing will cut the holes. I made some fiberglass reinforced silicone gaskets that way when I was getting started. It got old real fast.

NorTriDuc · 2026-03-01T18:03:17-0700

jseng1 said:
An exacto knife works but you have to be very carefull. An electric engraving tool with a sharpened blade instead of a point works best. A hole punch or piece of sharpened tubing will cut the holes. I made some fiberglass reinforced silicone gaskets that way when I was getting started. It got old real fast.

Shell casings also work good for gasket hole cutters

Andy Higham · 2026-03-02T00:44:31-0700

There is something strangely satisfying about trimming gaskets in situ. Not quite OCD

franko · 2026-03-02T07:38:18-0700

A shell casing, flattened on the end, also is good at cleaning out the valleys of files. Much better than a file card. After a few strokes, the casing is profiled to fit into the groves

Andy Higham · 2026-03-02T08:06:08-0700

In the UK we tend not to have shell casings hanging around

Fast Eddie · 2026-03-02T09:26:09-0700

Andy Higham said:
In the UK we tend not to have shell casings hanging around

A shotgun cartridge isn’t likely to have quite the same effect is it ?!

Andy Higham · 2026-03-02T09:58:43-0700

Tubular leather punches are good for thicker gasket holes. For thin paper gaskets, a single hole paper punch used upside down is easy to centre on the marked hole.

Amazon.co.uk

olympus · 2026-03-02T10:32:34-0700

Andy Higham said:
There is something strangely satisfying about trimming gaskets in situ. Not quite OCD

Oh yes it is

but it just has to be done

Silicone rocker cover gaskets

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