High Density Polyethylene (HDPE) Shelters

The ULTIMATE in Corrosion Protection

50 year warranty

HDPE is an engineered polymer…a polyethylene thermoplastic made with a mold.

Advantages of HDPE include:

  • Rust proof
  • Water proof
  • Extremely long lasting
  • Superior corrosion resistance
  • High chemical resistance
  • Strong and durable
  • Crack resistant
  • Resistant to environmental stress
  • Resistant to mechanical damage
  • Maintenance free
  • Easy to wipe clean
  • Non-conductive
Flatsafe in-garage storm shelter
HDPE Storm Shelters From FlatSafe
oklahoma HDPE storm shelters
Below Ground Storm Shelters

Other Common Uses for HDPE:

High Density Polyethylene is also commonly used for: boat lifts and personal watercraft docks, plastic bottles, jugs, food containers, storage totes, underground piping and culverts, plastic lumber and decking, cutting boards, auto parts, toys, etc.

Single Piece Lid System

All of our in ground FlatSafe Tornado shelters come with our patented single piece lid system. The lid is ¼” thick steel plate with added structural tubing to provide extra strength. The single-piece lid is larger than the frame of the saferoom opening and sits above the frame, not down inside the frame. Our lid system is MUCH stronger than the typical 2-piece lid system offered by everyone else and provides more than adequate ventilation to the occupants.

Our Shelters Will Never Float – Guaranteed.

FlatSafe Tornado Shelters are back-filled 100% with ready-mix concrete (NOT dirt) to counteract buoyancy and flotation. FlatSafe Tornado Shelters will never float…Guaranteed!