GERDA-PM-FR seal monolithic type

The Monolithic Transit is cast into a wall or floor opening. The opening can have any shape — the transit fills it during the casting process and hardens in place. A special intumescent material is used for formwork during casting. The Monolithic Transit is resistant to solutions of liquid aggressive media (acids, alkalis, and salts), and is also waterproof — it protects against the penetration of fresh or seawater under pressure up to 5.5 atm. The transit can be used on sea and river vessels, in railway rolling stock, including locomotives and special-purpose cars.

To confirm the fire resistance rating of the penetrations, tests were conducted at an accredited testing center in accordance with GOST R 53310-2009. The image below shows a fire-resistant penetration with installed cables — from the outside (a) and the inside (b) of the fire chamber of the test furnace. Note that inside the fire chamber (b), the penetration expanded in size, resulting in increased thermal insulation and the formation of a reliable barrier against the penetration of flame and combustion products.

The GERDA-PM-FR transit consists of the following components:

1. GERDA-PM-FR powder compound is the main component of the transit. When mixed with water, it forms a mixture for casting into the opening or floor slab. The mixture fills all free space in the opening or slab and hardens.
2. GERDA-PM-NM intumescent modules are used to create the formwork.
3. GERDA-PM-PZh impregnating liquid is intended for wetting the GERDA-PM-NM intumescent modules.
4. GERDA-PB-G-UF-FR fire-resistant sealant (if required). Used to provide the transit with hydrophobic properties and a clean, aesthetic appearance. Primarily applied in vertically installed transits — the top part is treated with the sealant.

1. Create a formwork frame in the opening or floor slab, for example, in the form of a casing pipe of circular or any other shape. The main requirement is that all corners in the formwork frame must be rounded. The formwork frame must include pouring holes with bosses (which help retain the pouring mixture).
2. Lay the required cables and pipes through the formwork/floor slab.
3. Use GERDA-PM-NM intumescent modules to fill the space in the formwork frame at the cable and pipe entry and exit points. Note that the intumescent modules expand approximately 10 times when wetted.
4. Thoroughly wet the laid intumescent modules with GERDA-PM-PZh impregnating liquid. Ensure tight adhesion of the swollen modules to the walls of the formwork frame.
5. Prepare the casting mixture from the GERDA-PM-FR powder compound in a special container (e.g., a bucket) by mixing GERDA-PM-FR with fresh water in a 2:1 ratio (by weight or volume). The mixture should be prepared at a temperature of no less than +3°C. The ready mixture must be poured into the formwork frame openings within 45 minutes (at +20°C). The mixture is poured manually or using a pump. The transit reaches its maximum hardness within 72 hours.
6. If necessary, apply the GERDA-PB-G-UF-FR fire-resistant sealant. The sealant is applied over the intumescent modules using a standard sealant gun, after which the surface is leveled with a trowel or spatula.