Not sealing - Tilia FoodSaver VAC420

remove gear box and flywheel for starters if the rear seal is in a case then remove that case and fit new seal. If it is a lip seal the remove the old seal and check the crank shaft for a groove. IT is grooved use a "speedie" sleeve ( trade mark name) from a bearing /seal supplier and then fit the new seal using a quality seal fitting tool.

If the rear main seal is the old two piece seal/ felt seal then you will have to virtually remove the crank to do the job properly.

In situations such as yours it is advisable to firstly go to the manufacturers spares department and enquire if one is available.. If not remove the seal and along with the measurement of the dia of the slip yoke go to a shop that sells bearing and seals only and they will be able to match up the correct seal. If you look closely at the seal there should be a make and seal number stamped /moulded on the outside face and this will identify the seal. All seals are made by seal makers and bearing makers so that is the best place to look

I don't know why you want to seal your attic but www.tydenbrooks.com provides wide range of industrial seal so you might want to go through it to find which suits best for you since you don't want any bolts or locks. People usually use good quality and high strength locks or bolts to seal the attic. But it is your choice whatever you want to use. Security Seals High Quality Tamper Evident Seals Bolt Seals Cable Seals...

I don't know why you want to seal your attic but some companies provides wide range of industrial seal so you might want to go through it to find which suits best for you since you don't want any bolts or locks. People usually use good quality and high strength locks or bolts to seal the attic. But it is your choice whatever you want to use.
You could try this link to get some good seal for your door.
Security Seals High Quality Tamper Evident Seals Bolt Seals Cable Seals... Security Seals High Quality Tamper Evident Seals Bolt Seals Cable Seals...

Taking out product from the store is the common case.We cannot blame our workers and we are sure that the amount was correct. All seals aren't reliable.I guess you aren't using the correct seal for your store.
You should use some more secured seals for your store.
I hope you will get some more help with this following site.
Try this companies seals.Those are more secured.


Security Seals High Quality Tamper Evident Seals Bolt Seals Cable Seals...

You would save yourself alot of headache to just get a new or rebuilt pump. But most ring seals can be replaced by taking off the pulley, then any retaining plate over the bearing/seal/shaft to expose the seal. Then pry out working around the seal with a seal pulling tool or small flat screwdriver. To install new seal, coat outer race and inner seal rubber of seal with a very thin coating of fresh motor oil, tap lightly around seal to get it started in seal cavity be sure it is even all the way around. Then get a socket or sleeve the same diameter as the outer diameter of the seal, place over the seal and tap it down gently until fully seated. Re-assemble casing and pulley.
Mike

Need to get at the crankshaft seal, usually by removing the crankshaft pulley and using a seal remover to take out the old seal, then put a new seal in.

Here are some instructions on how to do the 'rear' seal:
Rear Main Seal Removal & Installation 2.4L, 3.3L & 3.8L Engines To Remove:

1. Remove the transaxle and flexplate. CAUTION
   Make sure not to damage the crankshaft sealing surface when removing the oil seal.
   
2. Insert a flat-bladed pry tool or equivalent through the dust lip at an angle.
3. Carefully pry the oil seal out of the engine. Pry against the chamfered edge of the crankshaft, do not damage the sealing surface of the crankshaft or an oil leak may occur.

To Install:
CAUTION
Smooth any burr or rough edge on the crankshaft with 400 grit sandpaper to prevent seal damage during installation.
NOTE: When installing seal, no lube on seal is needed.

1. Place special tool 6926-1 seal guide or equivalent on crankshaft.
2. Place the seal on the guide. Make sure the seal lip is facing the crankshaft and the guide tool remains on the crankshaft. Rear crankshaft seal installation (2.4L engine shown, 3.3L & 3.8L engines similar)
   
   CAUTION
   Do not drive the seal into the block past flush. An oil leak may occur.
   
3. Drive the seal into the block using a seal driver or special tool 6926-2 and handle C-4171 until the tool bottoms out against the block and the seal is flush.
4. Install the flexplate and transaxle.

3.0L Engine To Remove:

1. Remove the transaxle and flexplate. CAUTION
   Make sure not to damage the crankshaft sealing surface when removing the oil seal.
   
2. Remove the oil seal with housing from the rear of the engine block.
3. Remove the oil seal from the housing.

To Install:

1. Clean the sealing surfaces on the seal housing and engine block.
2. Use a commercial seal installer to install the seal in the seal housing.
3. Apply a light film of motor oil to the seal lip.
4. Apply silicone sealant to the oil seal housing sealing surface and install the housing with seal on the engine block. Tighten all bolts to 104 in. lbs. (12 Nm).
5. Install the flexplate and transmission.