Both are non-woven, but the adhesive system differs
tesa 8854 and tesa 8858 both use a non-woven carrier, but 8854 uses a modified acrylic adhesive optimized for foam-to-metal bonding, while 8858 uses a different acrylic formulation for general-purpose double-sided bonding.
The adhesive coat weight and total thickness also differ. Confirm the manufacturer data sheet for both models before substituting one for the other in a production specification.
Match the tape to the foam and metal
For foam-to-metal bonding, 8854 is the specified grade in many drawings because of its proven adhesion to a range of foam grades and metal finishes. 8858 may suit lighter-duty applications or different substrate combinations.
Run a sample trial with the actual foam and metal. Record the peel adhesion after 20 minutes, 24 hours, and 72 hours. The initial tack and the cured adhesion can tell different stories.
Check the liner and converting format
Confirm the liner type and release values. A heavier release liner can slow production if the line depends on fast liner removal. Both models are available in rolls, sheets, and die-cut formats.
Browse tesa tape products or send a sourcing request with your drawing and test conditions.