FAQ

De Boer Liquids can be used at the following temperatures:

PMMA

• Temperature range in °C
• Air between - 5 and + 35
• Surface: between + 3 and + 50

PUR

• Temperature range in °C
• Air between + 5 and + 35
• Surface: between + 5 and + 50

See instruction table

When using De Boer Liquids, please consider the following hardening time:
 
PMMA
At 20 °C, 2% catalyst

• Working time: approximately 15 minutes
• Rain resistant: approximately 30 minutes
• Accessible / workable: approximately 1 hour
• Fully hardened: approximately 3 hours

 
PUR

• Working time: NA
• Rain resistant: approximately  4 hours
• Accessible / workable: approximately 24 hours
• Fully hardened: approximately 7 days

The more catalyst is added, the faster the product will harden and vice versa.

For catalyst dosage, please refer to the catalyst table.

Yes, it does. Taping the area which must be made waterproof is not only aesthetic; it also allows to check the layer thickness. The waterproofing system must have adequate thickness for the liquids to harden properly.

Yes, it can. In the case of small surfaces such as paths and markings, roofing can certainly be burnt on zones which have been coated with PMMA-based products. For bigger surfaces, please have De Boer NV assess the situation.

On a wet mineral surface such as stone and concrete a special kind of primer can be used. The surface must be wet, but should not be covered in water. The primer contains a special filling agent mixture which reacts with the humidity of the surface and which anchors to the surface. The primer thus shields from humidity and prevents moisture from mounting by capillary action. The next layer of the waterproofing system can be put on top of the primer. For all other kinds of surface, the surface needs to be perfectly dry when the products are applied. If the surface is wet, it can be dried with a wiper and/or a burner before applying De Boer Liquids.

Yes, they can. Once the waterproofing has hardened, an additional cover layer of De Boer DetailCryl is applied (ca. 1 kg/m²) and quartz sand 0,7-1,2 mm is immediately generously spread over it. Once the additional layer has hardened, the excess / loose sand is sucked away. The sand will give the required coarseness and mechanical resistance. The waterproofing itself should never be ground with sand. Use only dry quartz sand (available at De Boer NV).

See overview of surfaces.