Polyurethane Foam Sealing Strip
- Common size: 6-50 mm width, 2-12 mm thickness
- Color: black, grey, white, or custom color
- Material: soft open-cell polyurethane foam
- Backing: single-side pressure-sensitive adhesive
- Format: roll strip or cut-to-length strip
- Use: door, window, cabinet, equipment, joint sealing
Polyurethane Foam Sealing Strip from Double Seal Tape Company is manufactured for door, window, cabinet, equipment, and construction joint sealing where a soft compression fit is needed. The adhesive side helps hold the strip in position, while the PU foam body fills the gap after closing. With typical 2 mm – 12 mm thickness, 6 mm – 50 mm width, and 30%-50% compression testing, it helps reduce dust, light, drafts, minor air movement, and light moisture splash.
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Product Overview
This strip is made for sealing edges and gaps, not for structural mounting or double-sided bonding. It is normally applied to one side of a door frame, window frame, equipment cover, cabinet edge, painted metal housing, PVC profile, glass contact edge, or coated wood surface. When the opposite surface closes, the foam compresses and forms a soft gasket line.
Thickness selection should be based on the real closed gap, not only on the drawing size. For example, a 5 mm strip often works well when it closes to about 3 mm – 3.5 mm. If the strip is barely compressed, small air and light paths may remain along corners or uneven frame edges. If it is over-compressed, the door or cover may feel tight, foam recovery may drop, and the adhesive edge may start to lift.
For production use, the surface condition matters as much as the foam size. Oil, dust, cleaner residue, powder coating texture, uncured paint, or PVC plasticizer migration can change adhesive performance. That is why sample testing on the real surface is more useful than testing only on a smooth metal plate.
Benefits
- Helps reduce dust, light, drafts, and minor air movement under correct compression.
- Single-side adhesive backing keeps the strip aligned during assembly and closing tests.
- Soft PU foam, typically 20-45 kg/m3 density, adapts to small frame irregularities.
- 2 mm – 12 mm thickness options support different door, cabinet, equipment, and joint gaps.
- A 30%-50% compression test range helps balance sealing contact and closing force.
- Slit width tolerance of +/-0.5 mm to +/-1.0 mm supports stable frame-edge installation.
- Surface checks help reduce edge lifting, adhesive transfer, paint pull, and residue risk.
- Roll strip and cut-to-length formats suit manual installation and repeated production work.
What should be tested before applying the strip to painted metal, PVC, glass, or wood?
Before batch use, test the adhesive side on the actual painted metal, PVC, glass, or wood surface. Painted metal should be fully cured, dry, and free from oil, powder, wax, or loose coating. PVC profiles need a 24-72h adhesion check because plasticizer migration or low surface energy may weaken the bond. Glass should be cleaned of moisture, dust, and cleaner residue. Wood and coated boards may absorb adhesive or release weak paint during removal, so a small-area residue test is important. For sensitive coatings, remove the sample slowly at a low angle, around 45 degrees, then check for paint pull, adhesive transfer, edge curl, and surface marks.
TDS
Item | Typical Value |
Product type | Polyurethane Foam Sealing Strip for compression gap sealing |
Foam structure | Soft open-cell PU foam for flexible gap filling |
Thickness range | 2 mm - 12 mm, selected by real closing gap |
Width range | 6 mm - 50 mm, slit tolerance +/-0.5 mm to +/-1.0 mm |
Foam density | 20-45 kg/m3 depending on softness grade |
Adhesive backing | Single-side acrylic PSA or rubber PSA option for positioning |
Release liner | Paper or film liner, 80 um - 120 um typical |
Recommended compression | 30%-50% after closing-force and contact test |
Surface test time | 24-72h adhesion, residue, edge lifting, and compression recovery check |
Working surface | Painted metal, PVC, glass, coated wood, cleaned and tested before use |
Removal check | Low-angle removal around 45 degrees for sensitive painted or coated surfaces |
Sealing function | Dust, light, draft, minor air movement, and light moisture splash reduction |
Use limitation | Not for structural mounting, submerged water sealing, or pipe insulation wrap |
Product Packaging
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Applications
- Door and window frame gaps where a soft compression strip is required
- Cabinet door edges that need dust reduction and anti-rattle cushioning
- Electrical boxes, control panels, and equipment cover gasket lines
- Painted metal housings and access panels after surface compatibility checks
- PVC profiles, glass contact edges, and coated wood frames after residue testing
- Protected construction joints where dust, light, and draft reduction are needed
How much compression helps the foam strip seal gaps without causing edge lifting?
The strip should be chosen by the real gap after closing, not only by the original foam thickness. A practical starting range is 30%-50% compression. At this level, the foam can contact both sides of the joint and reduce dust, light, and air paths without creating too much rebound force. A 5 mm strip compressed to about 3 mm – 3.5 mm is a useful reference for sample checking. If compression is too low, leakage lines may remain at corners or uneven areas. If compression is too high, the strip may push back strongly, make the door or cover hard to close, and increase edge lifting risk. During testing, check closing force, corner contact, foam recovery after 24-72 hours, and whether the adhesive edge remains flat.
FAQ
Q1: Is this strip waterproof?
It helps reduce light moisture splash when properly compressed, but it is not a full submerged-water seal.
Q2: Can it be used on painted metal?
Yes, if the paint is fully cured, clean, dry, and tested for adhesion and removal residue.
Q3: What compression ratio is recommended?
A 30%-50% compression range is a useful starting point, depending on gap size and closing force.
Q4: Is this a double-sided mounting tape?
No. It is a single-side self-adhesive compression sealing strip, not a structural mounting tape.
