Compatibility Rating
At 20°C (68°F)
Excellent
Excellent resistance - recommended for continuous use
At 50°C (122°F)
Excellent
Excellent resistance - recommended for continuous use
Why is LDPE resistant to Seawater?
LDPE shows excellent resistance to Seawater due to its flexible polymer chains that resist attack from most aqueous solutions and inorganic chemicals.
⚠️ When NOT to use LDPE
Avoid using Low-Density Polyethylene with strong oxidizers, chlorinated solvents, and aromatic compounds. Temperature limit is approximately 60°C.
Comparison Table — All Materials for Seawater
| Material | 20°C | 50°C |
|---|---|---|
| HDPE | A | A |
| LDPE | A | A |
| PP | A | A |
| PTFE | A | A |
| PVDF | A | A |
| FEP | A | A |
| ECTFE/ETFE | A | A |
| EPDM | A | A |
| Viton (FPM) | A | A |
| NBR | A | A |
| Silicone | NR | NR |
| SS 316 | A | NR |
| SS 304 | A | NR |
| Aluminium | C | D |
| PVC Rigid | A | C |
| PVC Flexible | A | C |
| PMP | NR | NR |
| Polystyrene | A | A |
| SAN | A | A |
| Polycarbonate | A | A |
| PETG | A | A |
| Acetal (POM) | A | A |
| Nylon (PA) | A | NR |
| Polysulfone | NR | NR |
A=Excellent · B=Good · C=Fair · D=Poor · NR=No Data
🌡️ Temperature Note
Good resistance at both 20°C and 50°C. Maximum service temperature for this material is 60°C — above this, degradation risk increases significantly.
🔄 Better Alternative?
Consider: HDPE (stronger) or PP (higher temp). View all materials for Seawater →
FAQ
Is LDPE resistant to Seawater?
LDPE has Excellent (A) resistance to Seawater at 20°C. Excellent resistance - recommended for continuous use.
Can I store Seawater in LDPE containers?
Yes, LDPE is rated A (Excellent) for Seawater.