We frequently get questions about how a cold room door seal should be replaced. Sometimes it is hard to explain without a visual example. That is why we have developed a series of new animation videos that show step by step how the different types of profiles are installed.
Rubber profiles that cannot be welded
Some cold room door seals are made of rubber. Unlike PVC profiles, these cannot be supplied with welded corners. They are always delivered in rolls or by length and must be custom-fitted on site.
In practice there are two ways to finish corners.
The first is to cut the profile at a right angle and let one side overlap the other. When the joint is neatly glued, a solid corner connection is formed.
The second method is to cut out a 90-degree angle from the inside of the profile. The material is not cut through on the outside, so that the outside remains closed. The profile can then easily be folded to form a clean corner. By carefully sealing the seams with rubber glue, the connection remains airtight and flexible.
TPE profiles that can be welded
TPE profiles can be recognized by the “E” in the profile code. These seals can be delivered with welded corners, making installation simple. As with other dart profiles, the profile is pressed into the groove of the door.
In some variants, it is possible to have the bottom part with a sweeper, which gives extra sealing, for example in profile 164-AE+BE, seen in this animation.
Door seals with pre-welded corner pieces
For certain cold room profiles we supply corner pieces that are already welded. The remaining parts of the seal can then be cut to size and glued on site. Because the ends are straight rather than 45° angles, gluing is simpler.
Always use the correct adhesive type: rubber adhesive for rubber profiles, silicone adhesive for silicone profiles.
See animation 41-AE for the method.
Door seals with retaining strips
Some cold room brands use seals that are clamped against the door with retaining strips. These strips are usually reusable, provided they are not damaged. Always remove them carefully.
When replacement is required, we also supply the strips separately. They can be recognized by the “C” in the product code, for example type 43-C. The new seal is cut to size and then securely attached with the correct strip.
View animation 43-A20 to see how this mounting method works.
“Universal” rubber sweeper
DSU offers a universal sweeper solution that is applicable to many cold- and freezer-room doors and can be mounted easily. This combination consists of sweeper profile H3-65 and retainingstrip 22-C.
When a retainingstrip is already present, replacement is simple: remove the old sweeper and install the new one. If there is no strip present, 22-C must first be installed. In some doors it may be necessary to remove the door to gain access to the underside.
See animation H3-65 + 22-C for the full installation.
Practical tip
Always check in advance which profile type is used (PVC, TPE or rubber) and whether the corners are welded. Also check for the presence and condition of mounting strips.
This ensures you avoid ordering the wrong parts and saves time during installation or maintenance.
