PILOT LIDPACK® 3801L consists of a elastomeric core, surrounded by a cushion of Polypropylene, which has been spirally wrapped, with layers of PTFE tape to give maximum chemical resistance.
A second layer of braided of PTFE yarn gives the finished packing strength and resists abrasion. The final outer layers of unsintered PTFE tape gives complete impermeability to liquids and chemicals.
The construction ensures excellent recovery after compression from continual opening\closing of the tank lid.
All Beldam Crossley products are manufactured to an incredibly high standard. To do this, we manufacture from two locations based in the northern part of the UK. We operate to international global standards including BS EN ISO 9001 and BS EN ISO AS 9100.
We work within industries where quality is paramount, and we take this responsibility very seriously. Many of the products we provide are used to protect lives – failure is not an option.




We have been innovators in our industry for over a century. Since 1876 we have a solid track record of providing industrial sealing & bearing technology that protects lives, investments and environments.