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Should I use primer?

Primer is not always necessary but always recommended. Warmup recommends the use of:

For fleece-back applications: a solvent-free primer is recommended.

For a peel-and-stick application on an OSB subfloor: primer is required

For Peel-and-stick applications on a clean surface such as a plywood subfloor, Warmup insulation board, or concrete slab: primer is not required. The use of primer will always improve bonding.

Tip from Warmup: When in doubt, use primer!

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