Bonding building materials together in damp conditions is par for the course with trade professionals working outdoors. There are 1001 different types of glue/silicone/sealant/polymer on the market. So what is the best option for damp conditions?

First of all, we need to be very honest: bonding “wet” surfaces is impossible. Adhesives must be given the chance to adhere to the surface, and water acts as a barrier that makes this impossible. So always remove any surface moisture before you start.

Most building materials absorb moisture, so in practice, it is hardly ever possible to get the surface bone-dry. Your glue must therefore be able to adhere well despite the humidity.

That is where the Solid John polymer comes in. Its strength? That is very easy:

  • Its adhesion is excellent in humid conditions.
  • Its elasticity is high enough to bond 2 (different) building materials. That is very important, because each material is subject to small dimensional variations on its own that should not interfere with the other material.

The main application? An elastic bond between the plywood cavity closer and the top of the wall surface (wall stone, cladding, etc.) Of course the polymer can also be used for other elastic adhesions in the construction industry, particularly in humid conditions.

The Solid John polymer is only available in a 600 ml sausage pack. The reason for this is very simple: the polymer is a fairly solid material to ensure easy application without any dripping. Tube application would leave many trade professionals with a “Solid John polymer elbow”.

If you would like to test our products or get some extra advice on a specific application, we will be pleased to give you advice. Click here for the technical data sheet or contact us at

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