How do I open sentry H4100 file safe

To order replacement keys, for small chests and files, you will need to know the key numbers which can be found right around where the key goes in. It should be a stamped number, letters, or both located around the keyhole. For Personal, Home and Home/Office Safes, you will need the model number and serial number. I think that the most economical place to buy keys is from www.SentrySafeShop.com. You can do a search for "lost keys" and it will give you a screen where you can enter your model number and key number. They key ordering screen is: www.sentrysafeshop.com/Keys-Sentry-Safe-Replacement-Keys-p/keys.htm
They just need 1.)Model # and 2.)Serial or Key #.)

In Summary:
For Small Chests or Files: A lock reference number is required. It will be a letter, a number, a letter and number, or "blank" (no letter or number), engraved/located on the silver cylinder of the lock. These are model numbers 0500, 1100, 1170, etc...

For Personal, Home and Home/Office Safes: (model numbers will begin with: S0, S3, S4, S5; I0, I3, I4, I5; A3, A4, A5; J3, J4, J5; L0, L3, ,CS,CSW,DA,DS,KS,KSW,MS,MSW,OA,OS,and SC): Indicate your model number and the safe serial number found on the front right-hand side of the door, between the hinges.
Here is the direct link to the key replacement screen: http://www.sentrysafeshop.com/Keys-Sentry-Safe-Replacement-Keys-p/keys.htm
For Small Chests or Files: (Model numbers will begin with 0500, 1100, 1110, 1150, 1160, 1170, 1710, 1900, 1950, 1970, 1200, 1210, 1250, 2100, 2180, 2275, 2460, 6000, 6720, 7150, A3750, A5781, A5865, F2300, F3300, H2100, H2300, H3100, H2300, H3300, H4100, H4300, HD2100, HD4100, KDS-1, KS2100, KS4100, U2101, WD2, WD4, ESB-3, etc... ): A lock reference number is required. It will be a letter, a number, a letter and number, or "blank" (no letter or number), engraved/located on the silver cylinder of the lock (right around the hole where the key goes in at).

For Personal, Home and Home/Office Safes:(Model numbers will begin with: S0 (S0310, S0400, S0407, S0408, S0409, S0410), S3 (S3300, S3310, S3401, S3410, S3417, S3421, S3460, S3467, S3470, S3710, S3807, S3870, S3877, S3910), S4, S5; I0, I3, I4, I5; A3, A4, A5; J3, J4, J5; L0, L3, CS, CSW (CSW3460), DA (DA3831, DA3930), DS (DS3410, DS3431, DSW5781), KSW, MS, MSW, OA (OA3810, OA3821, OA5848), OS (OS0407, OS0410, OS0810, OS3407, OS3421, OS3470), SC, and X (X031, X075, X105, X125)): Indicate your model number and the safe serial number found on the front right-hand side of the door, between the hinges. Keys Sentry Safe Replacement Keys Keys Sentry Safe Replacement Keys

Well there is always risk in overseas business. You cannot back out just because there is risk. There is a company called Atmospherics Unlimited which is one of the leading companies which provides global security. It operated under high ethical standards and it ensures its clients strict compliance with laws and regulation in the countries in which they operate. They help you recruit staffs, hire qualified employees, create secure environment, make travel plans etc. AU's team provides high quality services in best value. Check following link for more information.
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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...

Why replace the tumblers when with free shipping you can order a key by code here

changed batteries and safe wont open

To order replacement keys, for small chests and files, you will need to know the key numbers which can be found right around where the key goes in. It should be a stamped number, letters, or both located around the keyhole. For Personal, Home and Home/Office Safes, you will need the model number and serial number. I think that the most economical place to buy keys is from www.SentrySafeShop.com. You can do a search for "lost keys" and it will give you a screen where you can enter your model number and key number. (It is a very easy screen to use. They just need 1.)Model # and 2.)Serial or Key #.)

In Summary:
For Small Chests or Files: (Model numbers will begin with 0500, 1100, 1110, 1150, 1160, 1170, 1710, 1900, 2100, 2275, 6000, 6720, F2300, F3300, H2100, H2300, H3100, H2300, H3300, H4100, H4300, HD2100L, KDS-1, KS2100, KS4100, WD2, etc... ): A lock reference number is required. It will be a letter, a number, a letter and number, or "blank" (no letter or number), engraved/located on the silver cylinder of the lock (right around the hole where the key goes in at). For Personal, Home and Home/Office Safes: (Model numbers will begin with: S0 (S0310, S0400, S0407, S0408, S0409, S0410), S3 (S3300, S3310, S3401, S3410, S3417, S3421, S3460, S3467, S3470, S3710, S3807, S3870, S3877, S3910), S4, S5; I0, I3, I4, I5; A3, A4, A5; J3, J4, J5; L0, L3, CS, CSW, DA (DA3831, DA3930), DS (DS3410, DS3431, DSW5781), KSW, MS, MSW, OA, OS (OS0407, OS0410, OS0810, OS3407, OS3421, OS3470), SC, and X (X031, X075, X105, X125)): Indicate your model number and the safe serial number found on the front right-hand side of the door, between the hinges. Here is the direct link to the lost key replacement screen: http://www.sentrysafeshop.com/Keys-Sentry-Safe-Replacement-Keys-p/keys.htm

To order replacement keys, for small chests and files, you will need to know the key numbers which can be found right around where the key goes in. It should be a stamped number, letters, or both located around the keyhole. For Personal, Home and Home/Office Safes, you will need the model number and serial number. I think that the most economical place to buy keys is from www.SentrySafeShop.com. You can do a search for "lost keys" and it will give you a screen where you can enter your model number and key number. (It is a very easy screen to use. They just need 1.)Model # and 2.)Serial or Key #.)

In Summary:
For Small Chests or Files: (Model numbers will begin with 0500, 1100, 1110, 1150, 1160, 1170, 1710, 1900, 2100, 2275, 6000, 6720, F2300, F3300, H2100, H2300, H3100, H2300, H3300, H4100, H4300, HD2100L, KDS-1, KS2100, KS4100, WD2, etc... ): A lock reference number is required. It will be a letter, a number, a letter and number, or "blank" (no letter or number), engraved/located on the silver cylinder of the lock (right around the hole where the key goes in at). For Personal, Home and Home/Office Safes: (Model numbers will begin with: S0 (S0310, S0400, S0407, S0408, S0409, S0410), S3 (S3300, S3310, S3401, S3410, S3417, S3421, S3460, S3467, S3470, S3710, S3807, S3870, S3877, S3910), S4, S5; I0, I3, I4, I5; A3, A4, A5; J3, J4, J5; L0, L3, CS, CSW, DA (DA3831, DA3930), DS (DS3410, DS3431, DSW5781), KSW, MS, MSW, OA, OS (OS0407, OS0410, OS0810, OS3407, OS3421, OS3470), SC, and X (X031, X075, X105, X125)): Indicate your model number and the safe serial number found on the front right-hand side of the door, between the hinges. Here is the direct link to the lost key replacement screen: http://www.sentrysafeshop.com/Keys-Sentry-Safe-Replacement-Keys-p/keys.htm

A locksmith can fit keys the the sentry safe 1170. Sentry safe lost key replacement is availble. You do need to know the key # that is on the face of the lock to cut a 1170 key by code.

There is a lock and there is a latch.
You can latch the safe without locking it and unlocking it does not unlatch it.

After you unlock it, then you must press up on the spring loaded latch while (this important) pressing down on the cover to releast the pressure on the latch hook, allowing it to move out of the way. After the latching hook is out of the way, you can release the pressure on the lid and it will open. You can't see the latch hook as it drops down from the lid, into the front wall of the safe where it engages a post, but perhaps you can imagine what it looks like.

Mine will not unlatch, even though it is unlocked, unless I press down on the lid to give it clearance first. There is quite a bit of spring in the plastic that this safe is constructed out of. It works against you when you try to open it and close it.

I can take digital photos of the mechanism if this description does not help.

Another Gary