Polyurethane Based, One Component, Joint Sealant - PUMAST 600

Description

PUMAST 600 is a highly elastic, low modulus polyurethane sealant, with good UV resistance and excellent adhesion to typical construction materials. PUMAST 600 is one component and cures with moisture to form a flexible sealant which can be overpainted after curing is finished. The sealant is non sagging, highly thixotropic, easy smoothing and has good workability. It is a perfect product for all types of static and dynamic expansion joints of structural members.

Fields of Application

PUMAST 600 is designed for civil and industrial movement, expansion, control and dilatation joints in architectural and heavy construction.
To be used as a sealant between concrete, mortar, brickwork, natural and synthetic stone, metal, steel, aluminum, wood, ceramic tiles, rigid plastics etc.
It can be used in drinkable water tanks safely.

Features and Benefits

Very elastic.
Protects elasticity between -40 °C to +80 °C.
One component. Easy to apply.
Cures with the humidity in the air.
It can be used in drinkable water tanks safely.
No need primer before PUMAST 600 for many surfaces.
Provides excellent adhesion on concrete, metal, wood and other surfaces.
Resistant to chemicals.

Application Procedure

Preparation of Substrate

All surfaces must be perfectly clean, dry and free from dust and grease. Since Pumast 600 is affected by water, the joints must be dry and contact with water must be prevented until full hardness is achieved. Where necessary apply a coating of primer on the joint walls. Use PU 101 A for porous (absorbing) surfaces like concrete, mortar etc.

Application Method

The sealant should not adhere to the joint bottom; the use of a joint backing rod is recommended. The width and depth of the joint must not be less than 5 mm. In manual applications, the material is places in an application gun and injected into the joint without causing the formation of any air bubbles.