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Related Reading

Melamine vs phenolic film-facedCore glue class (MUF vs PF) is a separate call from film-faced vs marine. That guide maps EN 636-2 vs EN 636-3 without confusing face film for bond class.
Marine vs regular plywoodWhen the question is wet-service structural plywood rather than a pour panel, this sibling compares marine cores to commodity framing sheets.
Marine Extra plywoodVoid-free hardwood core with premium keruing faces for permanent marine and outdoor wet duty, not formwork reuse.
Film faced formwork guideMill film-faced ladder, glue vs face film, and reuse cards when the job is concrete forming rather than marine wet work.

Quick Answers

Is film faced plywood waterproof?
No. Call it water-resistant. The phenolic face film and WBP core glue handle cyclical wet exposure on formwork. Permanent submersion and long outdoor structural duty still belong to a void-free marine core, not a pour panel.
Can marine plywood be used for concrete forms?
You can pour against it. You should not plan to. Without a phenolic film, wet concrete grips bare veneer, stripping scars both faces, and the finish shows wood grain. Film-faced panels are built for reuse and clean release at a lower program cost.
Which is cheaper, film faced or marine plywood?
Film faced is usually cheaper per sheet at equal thickness for formwork duty. Marine costs more because every ply is graded void-free. For pour cycles, cost-per-pour favors film faced when strip discipline holds.
When should I choose film faced instead of marine?
Choose film faced for concrete formwork: walls, slabs, columns, foundations, and precast. Choose marine when the panel stays wet for years in boats, docks, or permanent wet structures. Match the product to the job; do not force one sheet to cover both.
Do film faced panels still need edge sealing?
Yes. The face film covers the broad faces. Cut edges and drilled holes are the usual moisture paths between pours. Seal edges before the first pour, strip in the post-pour window, and store panels flat off the ground.
What outdoor plywood is not marine grade?
For outdoor formwork, EN 636-3 film-faced grades such as Pro Form Lite or Pro Form use WBP phenolic core glue. For permanent wet structural work that is not a pour cycle, specify a void-free marine panel instead of a film-faced formwork sheet.